Tapco Stereo Amplifier J1400 User Manual

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19. Exposure to extremely high noise levels may cause

permanent hearing loss. Individuals vary considerably in

susceptibility to noise-induced hearing loss, but nearly

everyone will lose some hearing if exposed to suﬃciently

intense noise for a period of time. The U.S. Government’s

Occupational Safety and Health Administration (OSHA) has

speciﬁed the permissible noise level exposures shown in the

following chart.

According to OSHA, any exposure in excess of these

permissible limits could result in some hearing loss. To

ensure against potentially dangerous exposure to high

sound pressure levels, it is recommended that all persons

exposed to equipment capable of producing high sound

pressure levels use hearing protectors while the equipment

is in operation. Ear plugs or protectors in the ear canals or

over the ears must be worn when operating the equipment

in order to prevent permanent hearing loss if exposure is in

excess of the limits set forth here.

Duration Per Day Sound Level dBA,

Typical

Example

In Hours

Slow Response

Packed garage concert

VW Bus Peace Train

100

102

105

110

115

Cranked psychedelic tunes

High speed chase on C.H.I.P.s

Loudest parts at a Heavy Metal concert

1.5

0.5

0.25 or less

What me, read a manual?

Before you begin, please make sure you read the Safety Instructions on page 2 and Getting Started on

page 4.

Your new TAPCO^®ampliﬁer is designed to set up quickly and operate easily. We know it’s often seen as a

sign of weakness to read a manual, along with asking for directions when lost, but maybe you can read the

rest when nobody is looking.

It is important to keep your receipt in a safe place, and not a bad idea to write your product information

here for future reference (i.e., insurance claims, tech support, return authorization, etc.).

Product Serial #:

Purchased at:

Date of purchase:

Part No. 0007787 Rev. B 06/05

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Getting Started

The following steps will help you set up your ampliﬁer, and get the

levels just right.

4. In STEREO and MONO modes, connect speaker

SETTINGS:

cables to the SPEAKER OUTPUTS, either the

1. Be sure the ampliﬁer’s POWER switch is oﬀ.

binding posts or the Speakon connectors.

ꢀ. Turn down both Level controls.

3. On the rear panel, set the SUBSONIC FILTER

switch OFF and the CLIP LIMIT switch ON.

4. Determine which AMP MODE is best for your

• The binding post connectors are wired as

follows:

red = hot (+ speaker terminal)

black = cold (– speaker terminal)

• The Speakon connectors are wired as follows:

1+ = hot (+ speaker terminal)

1– = cold (– speaker terminal).

application:

STEREO mode is the typical setup for amplifying

stereo signals. INPUT 1 is routed to CHANNEL

1 output, and INPUT 2 is routed to CHANNEL 2

output.

MONO mode is used for sending a mono signal

to both outputs, with separately adjustable level

controls. INPUT 1 is used in MONO mode (leave

INPUT 2 disconnected).

5. In BRIDGE mode, if using the binding post

outputs:

• CHANNEL 1 SPEAKER OUTPUT red post = hot

(+ speaker terminal)

• CHANNEL 2 SPEAKER OUTPUT red post =

cold (– speaker terminal)

BRIDGE mode uses both outputs to double

the power to one speaker (or set of speakers).

INPUT 1 is used in BRIDGE mode (leave INPUT 2

disconnected and the B Level control turned down).

NOTE: 4 ohms is the minimum speaker impedance

you should connect to the ampliﬁer in BRIDGE

mode. See “Do the Math” in Appendix B for

information on calculating speaker impedances.

Do not use the black terminals.

If using a Speakon connector, connect the

Speakon to the center BRIDGED connector.

• The BRIDGED Speakon connector is wired as

follows:

1+ = hot (+ speaker terminal)

2+ = cold (– speaker terminal).

6. Plug all the sound system components into

suitable AC outlets, properly grounded and

capable of delivering adequate current.

5. Set the AMP MODE switch according to your

application.

7. Make sure your signal source is powered up and

delivering signal to the amp.

8. Turn the power ampliﬁer’s switch on. Verify that

CONNECTIONS:

1. Using balanced cables, make connections from

your mixer (or other signal source) MAIN OUT to

your ampliﬁer’s INPUTs.

ꢀ. In STEREO mode, connect the cables from your

signal source to the ampliﬁer’s INPUT jacks,

either XLR or 1/4” TRS.

the POWER LED lights.

9. Slowly turn up both Level controls on the

ampliﬁer. You should hear music and see the

SIG LEDs ﬂashing. If the OL (Overload) LEDs

are ﬂashing, turn down either the Level controls

on the amp or the source signal’s output level

controls (i.e., master faders), until the OL LEDs

either blink occasionally or not at all.

• The XLR and TRS inputs for each channel are

wired in parallel.

• The balanced XLR inputs are wired as follows:

Pin 1 = shield (ground)

Pin 2 = hot (+)

Pin 3 = cold (–)

10.For quieter listening, it is preferable to adjust

the amp’s Level controls rather than the source

signal’s output level (unless you have the source’s

control all the way up!).

• The 1/4” TRS inputs are wired as follows:

Tip = hot (+)

Ring = cold (–)

Things To Remember:

• Never plug ampliﬁer outputs

into anything except speakers

(unless you have an outboard box

speciﬁcally designed to handle

speaker-level signals).

Sleeve = shield (ground)

3. In MONO mode and BRIDGE mode, connect

one cable from the input source to INPUT 1, and

connect nothing to INPUT 2.

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• Before making connections to an amp or

reconﬁguring an amp’s routing, turn the amp’s

level controls down, turn the power oﬀ, make the

changes, turn the power back on, and then turn

the level controls back up.

• If you shut down your equipment, turn oﬀ the

ampliﬁers ﬁrst. When powering up, turn on the

ampliﬁers last.

• Save the shipping box and packing material! You

may need it someday. If not, it makes a great end

table or hiding place for your cat.

Contents

SAFETY INSTRUCTIONS..............................................2

Getting Started..................................................................4

Introduction .........................................................................6

Hookup Diagrams .............................................................7

TAPCO Juice Features ..................................................8

FRONT PANEL FEATURES ....................................8

1. Level.............................................................................8

2. SIG ...............................................................................8

3. OL.................................................................................8

4. POWER ......................................................................8

REAR PANEL FEATURES ........................................8

5. Power Cord Socket ...............................................8

6. BREAKER...................................................................9

7. SPEAKER OUTPUTS ............................................9

8. INPUTS ......................................................................9

9. SUBSONIC FILTER ..............................................9

10. CLIP LIMIT ............................................................9

11. AMP MODE ..........................................................9

GENERAL PRECAUTIONS...........................................9

Rack Mounting .............................................................9

Thermal Considerations ....................................... 10

AC Power Considerations.................................... 10

Input Wiring................................................................ 10

Output Wiring ........................................................... 11

Appendix A: Service Information............................. 14

Warranty Service ..................................................... 14

T r oubleshooting........................................................ 14

Repair............................................................................ 15

Appendix B: T e chnical Inf o ......................................... 16

Do The Math: Ohms, Loads, and Such ............ 16

Juice Series Speciﬁcations .................................. 17

Juice Series Block Diagram ................................. 18

TAPCO LIMITED WARRANTY................................. 19

Don’t forget to visit our website at www.tapcogear.com

for more information about this and other TAPCO products.

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Introduction

Thank you for choosing a TAPCO Juice™ power ampliﬁer. The TAPCO product line hails back to the

days of TAPCO Corporation, Greg Mackie’s ﬁrst company. TAPCO revolutionized the audio industry in

1969 with the very ﬁrst 6-channel mixer speciﬁcally designed for keyboards and rock ‘N’ roll PA.

In essence, TAPCO re-deﬁned the price performance ratio and made high-quality professional audio

mixers accessible to virtually anyone. Today, TAPCO is reborn with the same ideals and is backed by

the world-class engineering and manufacturing horsepower of Mackie. The TAPCO J•800, J•1400, and

J•2500 are the ﬁrst power ampliﬁers in the TAPCO family.

The Juice Series™ of ampliﬁers are powerful and tough. They are designed to withstand the punishing

rigors of the road and continue to crank out ampliﬁed sound day after day, year after year.

Here’s a quick glance at the features packed into these juicy ampliﬁers:

•

J•800:

J•1400:

J•2500:

800 watts continuous @ 4 ohms bridged

1400 watts continuous @ 4 ohms bridged

2500 watts continuous @ 4 ohms bridged

•

Ultra-low noise/low-distortion design

Switchable low-cut ﬁlter @ 30 Hz on both channels

Switchable limiter on both channels

Balanced/unbalanced 1/4" TRS and XLR line input jacks

Speakon output connectors

Detented rotary gain controls calibrated in dB

Signal present and OL (overload) LEDs

Variable speed fans for superior cooling

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OPTIONALCONNECTION USING BINDING POSTS

TO SPEAKERS

Hookup Diagrams

Stereo Hookup

CHANNEL

BRIDGED

CHANNEL 1

SPEAKER CONNECTION

INPUT

CONNECTION

INPUT 2

CAUTION

CHANNEL

BRIDGED

CHANNEL 1

TO REDUCE THE RISK

OF FIRE OR ELECTRIC

SHOCK, DO NOT

EXPOSE THIS

BREAKER

OFF

SUBSONIC

FILTER AT 30Hz

APPARATUS TO

RAIN OR MOISTURE.

SEE INSTRUCTIONS

BEFORE USING.

LINE

FROM MIXING CONSOLE

LEFT AND RIGHT MAIN OUT

(BALANCED)

SPEAKER CONNECTION

AMP MODE

MONO

INPUT 1

CHANNEL

BRIDGED

CHANNEL

STEREO

BRIDGE

DESIGNED IN WOODINVILLE, WA, USA

"TAPCO" IS REGISTERED TRADEMARK

OF LOUD TECHNOLOGIES INC.

CLIP LIMIT

OFF ON

WWW.TAPCOGEAR.COM

LINE

(BALANCED)

AMP MODE SWITCH

STEREO

OPTIONALCONNECTION USING BINDING POSTS

TO SPEAKERS

Passive Speakers (Mackie C300s)

Mono Hookup

CHANNEL

BRIDGED

CHANNEL 1

SPEAKER CONNECTION

INPUT

CONNECTION

INPUT 2

CAUTION

CHANNEL

BRIDGED

CHANNEL 1

TO REDUCE THE RISK

OF FIRE OR ELECTRIC

SHOCK, DO NOT

EXPOSE THIS

BREAKER

OFF

SUBSONIC

FILTER AT 30Hz

APPARATUS TO

RAIN OR MOISTURE.

SEE INSTRUCTIONS

BEFORE USING.

LINE

(BALANCED)

SPEAKER CONNECTION

FROM MIXING CONSOLE

MAIN OUT

AMP MODE

MONO

INPUT 1

CHANNEL

BRIDGED

CHANNEL

STEREO

BRIDGE

DESIGNED IN WOODINVILLE, WA, USA

"TAPCO" IS REGISTERED TRADEMARK

OF LOUD TECHNOLOGIES INC.

CLIP LIMIT

OFF ON

WWW.TAPCOGEAR.COM

LINE

(BALANCED)

AMP MODE SWITCH

MONO

OPTIONALCONNECTION USING BINDING POSTS

TO SPEAKER

Bridge Hookup

– +

CHANNEL

BRIDGED

CHANNEL 1

Passive Speakers (Mackie C300s)

SPEAKER CONNECTION

INPUT

CONNECTION

INPUT 2

CAUTION

CHANNEL

BRIDGED

CHANNEL 1

TO REDUCE THE RISK

OF FIRE OR ELECTRIC

SHOCK, DO NOT

EXPOSE THIS

BREAKER

OFF

SUBSONIC

FILTER AT 30Hz

APPARATUS TO

RAIN OR MOISTURE.

SEE INSTRUCTIONS

BEFORE USING.

LINE

FROM MIXING CONSOLE

MAIN OUT

(BALANCED)

SPEAKER CONNECTION

AMP MODE

MONO

INPUT 1

CHANNEL

BRIDGED

CHANNEL

STEREO

BRIDGE

DESIGNED IN WOODINVILLE, WA, USA

"TAPCO" IS REGISTERED TRADEMARK

OF LOUD TECHNOLOGIES INC.

CLIP LIMIT

OFF ON

WWW.TAPCOGEAR.COM

LINE

(BALANCED)

AMP MODE SWITCH

BRIDGE

Passive Speaker (Mackie C300)

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TAPCO Juice Features

ꢀ

SIG

O O

dBu

POWER

3. OL

FRONT PANEL FEATURES

This is short for “overload.” These red LEDs

indicate when the output of the ampliﬁer has

reached the maximum, and is right on the hairy

edge of clipping. Clipping is bad for speakers and

should be avoided.

It is okay if the OL LED blinks occasionally. It

means that the transient peaks of the music are just

hitting the full output of the ampliﬁer.

However, if the OL (overload)

1. Level

These two knobs control the levels of Channels

1 and 2. The knobs are detented to make it easy to

set both controls to the same level. Usually, these

controls are set all the way up.

The ampliﬁers are designed so that a +3.4 dBu

(1.15V rms) input signal drives the ampliﬁer to full

power into 4 ohms:

J•800 = 300 watts per channel into 4 ohms

J•1400 = 450 watts per channel into 4 ohms

J•2500 = 750 watts per channel into 4 ohms

This equates to a gain of about 30 dB (30 dB, 32 dB,

and 34 dB respectively). The graphics around the

knob indicate full gain of (about) 30 dB when the

knob is all the way up (fully clockwise).

LED is blinking frequently or

continuously, turn down the source

signal (i.e., the mixer’s master

faders) or the ampliﬁer’s Level

controls.

4. POWER

After you have set the levels for the mixer (or

other signal source), adjust the Level controls on the

ampliﬁer as the ﬁnal adjustment to set the overall

volume for the system.

This handy switch turns the power ampliﬁer on

and oﬀ. When the ampliﬁer is on, the POWER LED

lights to let you know Juice is ready and rarin’ to go!

ꢀ. SIG

REAR PANEL FEATURES

This is short for “signal present.” These green

LEDs indicate when a signal is present after the

Level controls, at the output stage of the power

ampliﬁer. If the Level controls are turned all the way

down (fully counterclockwise), these indicators will

not light.

5. Power Cord Socket

Here is where you connect the detachable power

cord that came in the box with your ampliﬁer. Plug

the other end of the power cord into an AC outlet

properly conﬁgured with the voltage required for

your particular model.

INPUT

CONNECTION

INPUT 2

CAUTION

CHANNEL

BRIDGED

CHANNEL

TO REDUCE THE RISK

OF FIRE OR ELECTRIC

SHOCK, DO NOT

EXPOSE THIS

BREAKER

OFF

SUBSONIC

FILTER AT 30Hz

APPARATUS TO

RAIN OR MOISTURE.

SEE INSTRUCTIONS

BEFORE USING.

LINE

(BALANCED)

SPEAKER CONNECTION

BRIDGED

AMP MODE

MONO

INPUT 1

CHANNEL 2

CHANNEL 1

STEREO

BRIDGE

DESIGNED IN WOODINVILLE, WA, USA

"TAPCO" IS REGISTERED TRADEMARK

OF LOUD TECHNOLOGIES INC.

CLIP LIMIT

OFF ON

WWW.TAPCOGEAR.COM

LINE

(BALANCED)

10 11

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most speakers can’t reproduce frequencies that

low. By engaging the SUBSONIC FILTER, you allow

the ampliﬁer to power only the frequencies that

you can hear. In addition, this ﬁlter can remove low-

frequency stage noise (footsteps) and accidental

microphone pops that could damage a loudspeaker.

6. BREAKER

This is a resettable circuit breaker that monitors

the amount of current being drawn by the ampliﬁer.

Under normal operating conditions, this should never

pop. An unusual condition may cause the breaker to

pop, such as a mains voltage surge occurring at the

same time as a peak ampliﬁer output.

10. CLIP LIMIT

Turn the POWER switch oﬀ, and push the

The CLIP LIMIT switch is there to protect your

loudspeakers from the eﬀects of clipping. It is

designed to be virtually transparent, meaning you

probably won’t even notice any audible diﬀerence

when the switch is turned on.

BREAKER button in to reset the circuit breaker. Turn

the POWER switch back on and the ampliﬁer should

resume normal operation. If the circuit breaker pops

again, something probably isn’t right.

•

Make sure that the total impedance of the

speakers connected to the outputs is 2 ohms or

greater (per channel) in stereo mode, or 4 ohms

or greater in bridged mode.

We recommend that you leave this switch on at all

times. However, if you are working at quiet levels, or

you have already placed a compressor/limiter in the

signal path, you can leave the CLIP LIMIT switch oﬀ.

•

If the breaker pops right away, even with the

Level controls turned down and the speakers

disconnected, there may be something wrong

inside the ampliﬁer. Refer to “Appendix A:

Service Info.”

11. AMP MODE

This switch determines the input signal routing

within the ampliﬁer. For most applications, you

will use the STEREO setting. However, some

applications might be better suited for using either

the MONO or the BRIDGE setting.

7. SPEAKER OUTPUTS

You have two options for connecting your

STEREO: This mode accepts separate left and right

inputs (A and B), and routes them to the CHANNEL

1 and CHANNEL 2 outputs. Each channel’s Level

control adjusts the gain for its own channel.

MONO: This mode accepts a single input (INPUT

1), and routes it to both the CHANNEL 1 and

CHANNEL 2 outputs. Each channel’s Level control

adjusts the gain for its own channel.

BRIDGE: This mode accepts a single input (INPUT

1), and uses both ampliﬁer outputs to double the

power to one speaker (or set of speakers). Use the

CHANNEL 1 Level control to adjust the gain (turn

the CHANNEL 2 Level control all the way down).

See “Output Wiring” on page 11 for information on

how to connect a speaker in Bridge mode.

speakers: binding posts and Speakon connectors.

Normally, you would use either the binding posts

or the Speakon connectors. Since the connectors

are wired in parallel (e.g., CHANNEL 1 binding

post and Speakon are in parallel, and CHANNEL 2

binding post and Speakon are in parallel), you can

connect a speaker to each connector, as long as the

total impedance per channel is two ohms or more.

•

Two 8 ohm speakers in parallel equals 4 ohms.

Two 4 ohm speakers in parallel equals 2 ohms.

See “Output Wiring” on page 11 for information

on output connection wiring.

8. INPUTS

The Juice ampliﬁers give you two options for

connecting the input signal — XLR input connectors

and 1/4” TRS (Tip-Ring-Sleeve) connectors. These

inputs are in parallel, and are identical, electrically

speaking. You can connect either a balanced or an

unbalanced signal here.

Since these two inputs are in parallel, you

shouldn’t connect more than one source to the

INPUT 1 or INPUT 2 jacks. However, you can use

the unused input jack as a “Thru” connector, to

daisy-chain the signal to another ampliﬁer. See

“Input Wiring” on page 10 for information on input

connection wiring.

GENERAL PRECAUTIONS AND

CONSIDERATIONS

Rack Mounting

The Juice ampliﬁers are designed to be mounted

in a standard rack. They require two rack spaces

(2U = 3.5”). They also require 15.75” depth inside

the rack, including the rear support brackets. When

designing your rack, put the heavier items at the

bottom and the lighter items toward the top.

Secure the front panel of the ampliﬁer to the

front of the rack using four screws with soft washers

to prevent scratching the panel. In addition,

9. SUBSONIC FILTER

Turn this switch on to engage a low-frequency

cutoﬀ (high-pass) ﬁlter at 30 Hz. The Juice

ampliﬁers can amplify signals below 20 Hz, but

because of the weight of the ampliﬁer, you must

secure the rear support brackets of the ampliﬁer to

the back of the rack. You could use a support rail or

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shelf across the back of the rack, or angle brackets

attached between the rear support rails and the

rear rails of the rack. This is recommended for all

components mounted in a rack that is going to be

moved frequently (or thrown in the back of a pickup

truck and transported down a bumpy gravel road to

that outdoor festival!).

Input Wiring

Use a high-quality 3-conductor shielded cable

to connect the signal between the signal source

(mixing console, equalizer, etc.) and the balanced

inputs to the ampliﬁer. If you are using unbalanced

inputs, use a high-quality 2-conductor shielded

cable. Your TAPCO Dealer can recommend a

suitable cable for your application.

Thermal Considerations

When connecting a balanced signal, the

The Juice ampliﬁers are fan-cooled with two

separate fans. One fan brings cool air in from the

back and the other fan blows the warm air out

the front of the chassis. Make sure that cool air is

available at the back of the ampliﬁer, and that there

is room in the front for the warm air to exit from the

ampliﬁer and dissipate. If rack-mounted, make sure

the air being drawn from the rack is cool. Some rack-

mounted equipment expel warm air into the rack.

When the ampliﬁer is ﬁrst turned on, the fans run

at low speed. As the power output increases and

the amp warms up, the fans gradually increase in

speed to provide additional cooling.

connectors are wired thusly, according to the AES

(Audio Engineering Society) standards:

XLR TRS

Pin 2 Tip

Hot (+)

Cold (–)

Pin 3 Ring

Shield (Gnd) Pin 1 Shield

SHIELD

COLD

HOT

SHIELD

COLD

HOT

AC Power Considerations

Be sure the ampliﬁer is plugged into an AC outlet

that is able to supply the speciﬁed voltage. Be sure

the AC outlet can supply enough current to allow

full power operation of all the ampliﬁers plugged

into it. The outlet should be a three-prong socket

that matches the power cord.

BalancedXLRConnector

RING SLEEVE

TIP

SLEEVE RING TIP

WARNING: Bypassing the

plug’s safety ground pin can be

dangerous. Don’t do it!

RING

TIP

SLEEVE

Balanced1/4" TRSPlug

The AC current demand of an ampliﬁer varies

depending on several factors, including the load

impedance, the crest factor, and the duty cycle of

the program material. Under typical conditions

reproducing rock music where musical peaks are

just below clipping, the Juice ampliﬁers require the

following average currents.

Unbalanced TS (Tip-Sleeve) lines can be

accommodated via the TRS jack. Make sure the cord

terminates with a TS plug (like a guitar plug), or if it

is a TRS plug (like a headphone plug), make sure the

ring is tied to the shield, preferably at the source.

SLEEVE

TIP

J•800 = 5 A

J•1400 = 7 A

J•2500 =10 A

TIP

It is recommended that a stiﬀ supply of AC

power be used because the ampliﬁer places high

current demands on the AC line. The more power

that is available on the line, the louder the ampliﬁer

will play and the more peak output power will be

available for cleaner, punchier bass.

If you have more than one ampliﬁer sharing an

AC outlet, you should avoid turning them all on at

the same time. Rather, sequence them on, one at a

time, to prevent popping the circuit breaker (due

SLEEVE

Unbalanced1/4" TSPlug

If you set the AMP MODE switch

to MONO or BRIDGE, use the

INPUT 1 input only.

10^{to in-rush current).}

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Using the 1/4" TRS INPUT 1s a “Thru” Connector

Because the XLR connector and the 1/4" TRS

connector are in parallel, you can use the 1/4" TRS

jack as a “Thru” connector to pass the input signal on

to another ampliﬁer’s input (see Figure below).

Note: If you use an unbalanced

1/4" TS cable to daisy-chain

the TRS input jack to another

ampliﬁer, you will unbalance the

XLR input on the Juice ampliﬁer.

This negates the beneﬁts

associated with balanced lines

and inputs.

INPUT

CONNECTION

INPUT 2

CAUTION

CHANNEL

BRIDGED

CHANNEL

TO REDUCE THE RISK

OF FIRE OR ELECTRIC

SHOCK, DO NOT

BREAKER

OFF

EXPOSE THIS

APPARATUS TO

RAIN OR MOISTURE.

SEE INSTRUCTIONS

BEFORE USING.

SUBSONIC

FILTER AT 30Hz

LINE

(BALANCED)

FROM MIXING CONSOLE

LEFT AND RIGHT MAIN OUT

SPEAKER CONNECTION

AMP MODE

MONO

INPUT 1

CHANNEL

BRIDGED

CHANNEL

STEREO

BRIDGE

DESIGNED IN WOODINVILLE, WA, USA

REGISTERED TRADEMARK

"TAPCO" IS

OF LOUD TECHNOLOGIES INC.

CLIP LIMIT

WWW.TAPCOGEAR.COM

OFF

LINE

(BALANCED)

AMP MODE SWITCH

STEREO

INPUT

CONNECTION

INPUT 2

CAUTION

TO REDUCE THE RISK

OF FIRE OR ELECTRIC

SHOCK, DO NOT

EXPOSE THIS

OFF

SUBSONIC

FILTER AT 30Hz

Passive Speakers (Mackie C300s)

APPARATUS TO

RAIN OR MOISTURE.

SEE INSTRUCTIONS

BEFORE USING.

LINE

(BALANCED)

MONO

INPUT 1

CHANNEL

BRIDGED

CHANNEL

DESIGNED IN WOODINVILLE, WA, USA

REGISTERED TRADEMARK

"TAPCO" IS

BRIDGE

OF LOUD TECHNOLOGIES INC.

CLIP LIMIT

OFF ON

WWW.TAPCOGEAR.COM

LINE

(BALANCED)

AMP MODE SWITCH

STEREO

Usingthe1/4" TRSINPUT1sa“Thru”Connector

Passive Speakers (Mackie C300s)

In MONO and BRIDGE modes,

LOOK

INPUT 1 and INPUT 2 are

connected together in parallel.

This allows you to use INPUT 2 as a

“Thru” connector to daisy-chain the

input signal to another ampliﬁer.

Load

Wire Length Impedance

Gauge of

Wire

CLOSER

Up to 25 ft.

Up to 40 ft.

Up to 60 ft.

Up to 100 ft.

Up to 150 ft.

Up to 250 ft.

2Ω

4Ω

8Ω

2Ω

4Ω

8Ω

2Ω

4Ω

8Ω

2Ω

4Ω

8Ω

2Ω

4Ω

8Ω

2Ω

4Ω

8Ω

14 gauge

16 gauge

18 gauge

12 gauge

14 gauge

18 gauge

10 gauge

12 gauge

16 gauge

8 gauge

Output Wiring

Use heavy gauge, stranded wire for connecting

speakers to the Speakon outputs jacks. As the

distance between the ampliﬁer and the speakers

increases, the thickness of the wire should also

increase. Speaker wire has resistance, and when

electricity passes through a resistor, power is lost. The

thicker the wire, the less resistance it offers, and the

more power actually gets to the speaker.

10 gauge

14 gauge

6 gauge

The thickness of the wire is rated in gauges. Use the

chart at the right to determine the correct gauge of

wire to use according to the distance between the

speakers and the ampliﬁer, and the impedance of

the load the ampliﬁer is driving. This ensures that the

power lost across the speaker wire is less than 0.5 dB.

8 gauge

12 gauge

4 gauge

6 gauge

10 gauge

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Stereo and Mono Modes

Binding Posts

Bridged Mode

Binding Posts

When using the binding posts in bridge mode,

connect the positive side of the speaker cable to

the CHANNEL 1 red (+) binding post, and connect

When using the binding post

outputs in stereo or mono modes,

you can terminate your speaker

cables with single or double banana the negative side of the speaker cable to the

plugs, spade lugs, or leave them CHANNEL 2 red (+) binding post. No, that’s not a

unterminated (bare wires): unscrew typo. You only use the red binding posts in Bridged

the amp’s binding posts enough to

reveal the holes on their sides, then

insert your stripped wires (stripped

about 3/8" back) into the holes and

retighten the posts (ﬁnger tight is

ﬁne). Be careful that no runaway

strands touch the chassis or other

terminal.

The red posts are labeled “+,”

which means positive. The black

posts are labeled “–” for negative.

You probably know the importance

of getting these correct — if one

speaker is hooked up “in phase” and

the other speaker is “out of phase,”

you’ll be “out of work.” (By the way,

although everyone says “phase” in

this situation, the correct word is

“polarity.”)

mode. Do not use the black posts.

TO SPEAKER

– +

CHANNEL 2

BRIDGED

CHANNEL 1

SPEAKER CONNECTION

BridgedBindingPostConnection

Since bridged mode is a type of mono mode,

turning a stereo ampliﬁer into a single channel

ampliﬁer, use only the CHANNEL 1 input. Turn the

CHANNEL 2 level control all the way down.

Speakons

When using bridge mode, wire the Speakon

connector as follows:

When using the Speakon outputs in stereo or

mono modes, wire the Speakon connectors as

shown below:

1–

COLD

1–

AMPLIFIER

END

HOT

COLD

1–

2–

HOT

2–

1–

StereoandMonoSpeakonConnection

COLD

HOT

1–

SPEAKER

END

2–

BridgedSpeakonConnection

1ꢀ

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Dual-Channel Connection

The BRIDGED connector has the added feature

of providing both speaker outputs on a single

connector. This allows you to use a single cable

to carry both channels from the ampliﬁer to the

speakers.

Many speakers with Speakon connectors provide

an Input connector and a “Thru” connector for

connecting a second speaker in parallel. You can

use the Thru connector to connect the CHANNEL 2

ampliﬁer output to the CHANNEL 2 speaker.

In stereo mode, CHANNEL 1 output is available

at Pins 1+ and 1–, and CHANNEL 2 is available at

Pins 2+ and 2– on the BRIDGED connector. Wire all

four pins in the Speakon connector, as shown below,

at both ends of the cable. For the cable connecting

the “Thru” connector to the second speaker, you

need to use a “crossover” cable that connects pins

2+ and 2– on the “Thru” connector to pins 1+ and

1– on the second speaker input end.

CAUTION

INPUT

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS APPARATUS TO RAIN OR

MOISTURE. SEE INSTRUCTIONS BEFORE USING.

CONNECTION

INPUT B

SERIAL/DATE CODE

BREAKER

SPEAKER CONNECTION

OFF

SUBSONIC

FILTER AT 30Hz

LINE

(BALANCED)

FROM MIXING CONSOLE

LEFT AND RIGHT MAIN OUT

STEREO/MONO

CHANNEL

BRIDGED

AMP MODE

MONO

INPUT A

BRIDGED

CHANNEL

BROUGHT TO YOU BY THE GROOVY FOLKS IN

STEREO

BRIDGE

WOODINVILLE, WA, USA. MANUFACTURED IN

ITALY. "TAPCO" AND "MACKIE" ARE REGISTERED

TRADEMARKS OF MACKIE DESIGNS INC.

CLIP LIMIT

OFF ON

WWW.TAPCOGEAR.COM

LINE

(BALANCED)

Passive Speakers (Mackie C300s)

AMP MODE SWITCH

STEREO

TO FIRST

SPEAKER INPUT

CHANNEL A

COLD

SPEAKER

END

AMPLIFIER

END

TO SECOND

SPEAKER INPUT

FROM "THRU"

OUTPUT

1–

HOT

2–

Crossover Cable

2–

(Pin 2+ to Pin 1+

Pin 2– to Pin 1–)

COLD

CHANNEL B

COLD

1–

TO SECOND

SPEAKER INPUT

FROM "THRU"

OUTPUT

HOT

2–

Dual-ChannelSpeakonConnection

CHANNEL B

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Appendix A: Service Information

One side is way louder than the other

Warranty Service

•

Are both Level controls set to the same position?

Details concerning Warranty Service are spelled

out in the Warranty section on page 19.

If you think your ampliﬁer has a problem, please

do everything you can to conﬁrm it before calling

for service. Doing so might save you from the

deprivation of your ampliﬁer and the associated

suﬀering.

Check your source signal to make sure the left

and right signals are balanced.

•

Are the speaker impedances matched? Diﬀerent

speaker loads can cause diﬀerent volume levels

on each side.

Try switching sides: Turn oﬀ the amp, swap the

speaker cables at the amp, turn the amp back

on. If the same side is still louder, the problem

is with your speaker cabling. If the other side is

louder now, the problem is with the mixer, the

amp, or the line-level cabling.

These may sound obvious to you, but here are

some things you can check. Read on.

Troubleshooting

No Power

•

Our favorite question: Is it plugged in? Make sure

the AC outlet is live (check with a tester or lamp).

Our next favorite question: Is the POWER switch

on? If not, try turning it on.

Is the red LED next to the POWER switch

illuminated? If not, make sure the AC outlet is

live. If so, refer to “No Sound” below.

The stereo music sounds kind of

sideways, and the bass frequencies

diminish when standing center, but get

louder as you approach one side

•

Check the polarity of the speaker cable

connections. You may have your positive and

negative reversed at one end of one speaker cable.

•

Has the BREAKER switch popped? Try pushing

in the BREAKER switch. If it pops out again right

away, refer to “Repair” on the next page.

The AC fuse inside the ampliﬁer is blown. This is

not a user-serviceable part. Refer to “Repair” on

the next page to ﬁnd out how to proceed.

As soon as the music gets loud, the amp

shuts down

•

Check the OL LEDs and make sure that they are

not lighting continuously. If they are, turn down the

signal source or the Level controls on the amp.

No Sound

•

Can the amp breathe? The ampliﬁer draws

its ventilation air in from the back. It needs

plenty of fresh air to stay cool. Do not block the

ventilation holes.

•

Are the channel Level controls turned up? Slowly

turn them up and see if you hear anything.

•

Is the signal source turned up? Make sure the

signal level from the mixing console (or whatever

device immediately precedes the ampliﬁer) is

high enough to produce sound in the ampliﬁer.

The SIG LEDs should be blinking to indicate that

signal is present.

I hear thunder, even when the ampliﬁer

is turned oﬀ

•

It’s going to rain. Get inside quickly. Bring the

ampliﬁer with you.

•

If the speakers are wired for BRIDGE mode,

make sure the AMP MODE switch is set to

BRIDGE.

If the ampliﬁer has gotten extremely hot, the

thermal protection circuit may have activated.

Allow the ampliﬁer to cool down and normal

operation should resume.

Are there fuses in the speakers, or in-line fuses

in the speaker wire? Check ‘em to see if they’re

blown.

Poor sound

•

Is it loud and distorted? Turn down the signal

coming from the mixer or signal source.

•

Is the input connector plugged completely

into the jack? Check the speaker connections

and verify that all connections are tight and

that there are no stray strands of wire shorting

across the speaker terminals.

•

If possible, listen to the signal source with

headphones plugged into the console. If it

sounds bad there, the problem is not in the

ampliﬁer.

Make sure the speakers are working properly.

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Noise/Hum

•

Check the signal cable between the mixer and

the ampliﬁer. Make sure all connections are

good and sound.

Make sure the signal cable is not routed near

AC cables, power transformers, or other EMI-

inducing devices.

Is there a light dimmer or other SCR-based

device on the same AC circuit as the ampliﬁer?

Use an AC line ﬁlter, or plug the ampliﬁer into a

diﬀerent AC circuit.

If possible, listen to the signal source with

headphones plugged into the console. If it

sounds noisy there, the problem is not in the

ampliﬁer.

4. Pack the ampliﬁer in its original package,

including endcaps and box. This is VERY

IMPORTANT. When you call for the Service

Request Number, please let Tech Support know

if you need new packaging. You can order new

packaging through our parts department.

TAPCO is not responsible for any damage that

occurs due to non-factory packaging.

5. Include a legible note stating your name,

shipping address (no P.O. boxes), daytime phone

number, RA number, and a detailed description of

the problem, including how we can duplicate it.

•

6. Write the Service Request Number inBIG PRINTon

top of the box. Units sent to us without the Service

Request Number will be refused.

Repair

7. Tech Support will tell you where to ship the

ampliﬁer for repair. We suggest insurance for all

forms of cartage.

Service for TAPCO ampliﬁers is available

at a factory-authorized service center. Service

for TAPCO ampliﬁers living outside the United

States can be obtained through local dealers or

distributors.

If your ampliﬁer needs service, follow these

instructions:

1. Review the preceding troubleshooting

suggestions. Please.

2. Call Tech Support at 1-877-827-2669, 7 am to

5 pm PST, to explain the problem and obtain a

Service Request Number. Have your ampliﬁer’s

serial number ready.

8. We’ll try to ﬁx the ampliﬁer within ﬁve business

days. Ask Tech Support for the latest turn-

around times when you call for your Service

Request Number. The ampliﬁer must be

packaged in its original packing box, and must

have the Service Request Number on the box.

Once it’s repaired, we’ll ship it back the same

way in which it was received. This paragraph

does not necessarily apply to non-warranty

repair.

Note: You must have a sales receipt from an Authorized

TAPCO Dealer to qualify for a warranty repair.

You must have a Service Request Number

before you can obtain factory-authorized.

3. Keep this owner’s manual and the detachable

power cord. We don’t need them to repair the

ampliﬁer.

Lonely? Looking for that special someone? Do you have a question about your

TAPCO Ampliﬁer?

Please call our Technical Support folks at 1-877-8ꢀ7-ꢀ669, Monday to Friday, from 7 am to 5 pm PST.

After hours, visit www.tapcogear.com and look under Support, or e-mail us at [email protected]

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Appendix B: Technical Info

Do The Math: Ohms, Loads, and

Such

speaker fails in a parallel conﬁguration, the others

will still work.

An ohm is a unit of resistance — the more ohms,

the more resistance (or, more accurately in this case,

impedance). The more the resistance, the less the

power.

Calculating parallel loads is easy, as long as

each speaker has the same value — just divide the

value by the number of speakers. For instance, four

8-ohm speakers, connected in parallel, will equal 2

ohms (8/4 = 2). If the loads are not all the same, the

formula gets a little more complicated, but nothing

that you can’t do with a simple calculator.

If you’re dealing with just one speaker (or cabinet)

per output, the load in ohms is usually printed on it

somewhere. That’s your load, usually 8 ohms or 4

ohms.

If you’re driving an assortment of speakers,

things can get complicated. There are two basic

ways of linking multiple loads (or speakers in this

case): series and parallel.

Since series connections are not normally used

in PA applications, we’ll concentrate on the parallel

connection. Parallel means that the positive amp

output connects to the positive terminals of all the

speakers, and the negative amp output connects

to the negative terminals of all the speakers. If one

Z =

. . .

Using this formula, an 8-ohm speaker and a 4-

ohm speaker, connected in parallel, will equal 2.7

ohms. Remember that the Juice ampliﬁers require

2 ohms or greater per channel in Stereo or Mono

mode, and 4 ohms or greater in Bridge mode.

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Juice Series Speciﬁcations

Continuous Sine Wave Average Output Subsonic Filter

– 9 dB @ 30 Hz

Power for each channel with both

channels driven, ꢀ0 Hz to ꢀ0 kHz

Topology

J•800

J•1400

800 W

450 W

310 W

J•ꢀ500

1400 W

750 W

575 W

J•800, J•1400:

J•2500:

Class AB

Class H

2 ohms:

4 ohms:

8 ohms:

480 W

300 W

205 W

Cooling

Dual variable-speed fans with back to front airﬂow

Bridged Mono Operation, ꢀ0 Hz to ꢀ0 kHz

J•800

800 W

560 W

J•1400

1400 W

900 W

J•ꢀ500

2500 W

1500 W

Indicators

4 ohms:

8 ohms:

Channels A and B

SIG (Signal Present), OL (Overload)

POWER

Note: Power ratings are speciﬁed at 120 VAC line voltage.

Current Consumption

Power Bandwidth

J•800

0.5 A

3.9 A

5.0 A

7.0 A

J•1400 J•2500

5 Hz to 50 kHz (+0, –3 dB)

Idle

0.5 A

5.1 A

1.0 A

8.1 A

Musical Program @ 8Ω

Musical Program @ 4Ω

Musical Program @ 2Ω

Frequency Response

6.7 A

10.6 A

10.0 A

17.2 A

25 Hz to 25 kHz (+0, –1 dB)

Distortion

AC Power Requirements

THD and SMPTE IMD; 20Hz to 20kHz

< 0.03% @ 8 ohms

U.S.

120 VAC, 60 Hz

240 VAC, 50 Hz

Europe

Japan

Korea

100 VAC, 50/60 Hz

220 VAC, 60 Hz

Signal-to-Noise Ratio

> 100 dB below rated power into 4 ohms

Physical Dimensions and Weight

Channel Separation

Height:

Width:

Depth:

Weight:

3.5 in/89 mm

> 90 dB @ 1 kHz

19.0 in/483 mm

15.7 in/400 mm

Damping Factor

J•800:

J•1400:

J•2500:

43.6 lb/19.8 kg

48.5 lb/22.0 kg

56.2 lb/25.5 kg

> 300 @ 1 kHz and below

Input Impedance

20 kΩ balanced

Disclaimer

10 kΩ unbalanced

Since we are always striving to make our products better by

incorporating new and improved materials, components, and

manufacturing methods, we reserve the right to change these

speciﬁcations at any time without notice.

Input Sensitivity

1.15 V (+3.4 dBu) for rated power into 4 ohms

Gain

J•800:

30 dB

32 dB

34 dB

J•1400:

J•2500:

Maximum Input Level

9.75 Vrms (+22 dBu)

Turn On Delay

2.5 seconds

“TAPCO” is a registered trademark of LOUD Technologies Inc. “Juice” is a trademark of LOUD Technologies Inc.

All other brand names mentioned are trademarks or registered trademarks of their respective holders, and are hereby acknowledged.

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Juice Series Block Diagram

This shows an outline of the interesting things going on inside the ampliﬁer.

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TAPCO LIMITED WARRANTY

A. LOUD Technologies Inc. warrants all materials,

workmanship and proper operation of this TAPCO

product for a period of one year from the original

date of purchase. If any defects are found in the

materials or workmanship, or if the product fails to

function properly during the applicable warranty

period, LOUD Technologies, at its option, will repair

or replace the product. This warranty applies only

authorized service centers may use refurbished parts for

repair or replacement of any product. Products returned

to LOUD Technologies that do not meet the terms of this

Warranty will not be repaired unless payment is received

for labor, materials, return freight, and insurance.

Products repaired under warranty will be returned

freight prepaid by LOUD Technologies to any location

within the boundaries of the USA.

to equipment sold and delivered within the U.S. by

LOUD Technologies or its authorized dealers.

B. Failure to register online or return the product

G. LOUD Technologies warrants all repairs performed for

90 days or for the remainder of the original warranty

period. This warranty does not extend to damage

resulting from improper installation, misuse, neglect

or abuse, or to exterior appearance. This warranty

is recognized only if the inspection seals and serial

number on the unit have not been defaced or removed.

H. LOUD Technologies assumes no responsibility for

the quality or timeliness of repairs performed by

Authorized TAPCO Service Centers.

I. This warranty is extended to the original purchaser

and to anyone who may subsequently purchase

this product within the applicable warranty period.

A copy of the sales receipt is required to obtain

warranty repairs.

J. This is your sole warranty. LOUD Technologies Inc.

does not authorize any third party, including any

dealer or sales representative, to assume any liability

on behalf of LOUD Technologies or to make any

warranty for LOUD Technologies Inc.

K. THE WARRANTY GIVEN ON THIS PAGE IS

THE SOLE WARRANTY GIVEN BY LOUD

TECHNOLOGIES INC. AND IS IN LIEU OF

ALL OTHER WARRANTIES, EXPRESS AND

IMPLIED, INCLUDING THE WARRANTIES

OF MERCHANTABILITY AND FITNESS FOR

A PARTICULAR PURPOSE. THE WARRANTY

GIVEN ON THIS PAGE SHALL BE STRICTLY

LIMITED IN DURATION TO ONE YEAR FROM

THE DATE OF ORIGINAL PURCHASE FROM

AN AUTHORIZED TAPCO DEALER. UPON

EXPIRATION OF THE APPLICABLE WARRANTY

PERIOD, LOUD TECHNOLOGIES INC. SHALL

HAVE NO FURTHER WARRANTY OBLIGATION

OF ANY KIND. LOUD TECHNOLOGIES INC.

SHALL NOT BE LIABLE FOR ANY INCIDENTAL,

SPECIAL, OR CONSEQUENTIAL DAMAGES

THAT MAY RESULT FROM ANY DEFECT IN THE

TAPCO PRODUCT OR ANY WARRANTY CLAIM.

Some states do not allow exclusion or limitation of

incidental, special, or consequential damages or

a limitation on how long warranties last, so some

of the above limitations and exclusions may not

apply to you. This warranty provides specific legal

rights and you may have other rights which vary

from state to state.

registration card will not void the one-year warranty.

C. Service and repairs of TAPCO products are to be

performed only at a factory-authorized service

center. Unauthorized service, repairs, or modiﬁcation

will void this warranty. To obtain repairs under

warranty, you must have a copy of your sales receipt

from the authorized TAPCO dealer where you

purchased the product. It is necessary to establish

purchase date and determine whether your TAPCO

product is within the warranty period.

D. To obtain factory-authorized service:

1. Call TAPCO Technical Support at 877/827-2669,

7 AM to 5 PM Monday through Friday (Paciﬁc Time)

to get a Service Request Number. Products returned

without a Service Request Number will be refused.

ꢀ. Pack the product in its original shipping carton.

Also include a note explaining exactly how to

duplicate the problem, a copy of the sales receipt

with price and date showing, and your return stree

address (no P.O. boxes or route numbers, please!).

If we cannot duplicate the problem or establish the

starting date of your Limited Warranty, we may, at

our option, charge for service time.

3. Ship the product in its original shipping carton,

freight prepaid, to the authorized service center.

The address of your closest authorized service

center will be given to you by Technical Support.

IMPORTANT: Make sure that the Service Request

Number is plainly written on the shipping carton.

E. LOUD Technologies Inc. reserves the right to

inspect any products that may be the subject of any

warranty claims before repair or replacement is

carried out. LOUD Technologies may, at our option,

require proof of the original date of purchase in the

form of a dated copy of the original dealer’s invoice

or sales receipt. Final determination of warranty

coverage lies solely with LOUD Technologies Inc.

F. TAPCO products returned to one of the LOUD

Technologies factory-authorized service centers and

deemed eligible for repair or replacement under the

terms of this warranty will be repaired or replaced

within thirty days of receipt. LOUD Technologies and its

Please keep your sales receipt in a safe place.

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