X3.60 / X3.71
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TABLE OF CONTENTS
INTRODUCTION
2
3 ~ 4
FEATURES & SPECIFICATIONS
CONTROLS & FUNCTIONS
5 ~ 10
PLANNING & MOUNTING YOUR SYSTEM
WIRING DIAGRAM
11
12
13
14
15
BRIDGING TWO AMPLIFIERS
ADJUSTING & TUNING
TROUBLE SHOOTING
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INTRODUCTION
Ampliꢀer's provide high-performance sound reinforcement for your
mobile audio equipment. TheMulti-Mode bridging capabilities allow
ꢁexibility in hosting severaldiꢂerent speaker conꢀgurations.
To achieve optimum performance, it is highly recommended that you read
this Owners Manual before beginning installation.
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2
FEATURES
X3.60
4000Watts
Max Power
350<@80Hz(+/- 5Hz)
15Hz ~150Hz
0.5 ~ 10.0 (volts)
24dB / octave
18dB
50Hz ~ 150Hz
0 ~ 180 deg.
0 ~ 18dB
Damping factor
Operating frequency(band-width)
Input Sensitivity
Low-Pass crossover slope attenuation factor
Subsonic(cut/increase) range factor (15Hz ~ 40Hz)
Continuously variable low-pass control(range)
Continuously variable phase control(range)
Continuously variable bass boost control(range)
Source voltage (Automobile battery)(range)
Maximum DC current 1 Ohm, 1% THD +n
Dimensions(L x W x H)
11 ~ 16V DC
249 amperes DC *
21" x 11.5" x 2.5"
13.5V DC & 14.4V DC
Test voltage
Platinum RCA connectors
Strap-able; Slave-master relationship
* "maximum" current consumption reading was extracted at the impedance speciꢀed and at
a source voltage of 14.4V DC
Source voltage is limited to 11V~16V.
If source voltage beyond this limit is applied to the Ampliꢀer, the warranty will be voided.
Speciꢀcations
X3.60
16 Volts DC
14.4 Volts DC
12 Volts DC
Impedance Load Measurement 1%THD 5%THD 10%THD 1%THD 5%THD 10%THD 1%THD 5%THD 10%THD
2860
53.4
2070
64.3
1086
65.9
2940
54.2
2130
65.3
1120
66.9
3180
56.3
2300
67.8
1200
69.3
2780
52.7
1920
61.9
1050
64.8
2880
53.6
1988
63
3115
55.8
2150
65.6
1178
68.6
2560
50.5
1344
51.8
898
2635
51.3
1380
52.5
925
2840
53.3
1490
54.5
998
RMS Wattage
RMS AC Volts
RMS Wattage
RMS AC Volts
RMS Wattage
RMS AC Volts
1 Ohm
2 Ohm
4 Ohm
1085
65.8
59.9
60.8
63.1
4000 Watt 2-second Burp Power at 16V and 10%
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3
FEATURES
X3.71
6500Watts
Max Power
350<@80Hz(+/- 5Hz)
15Hz ~150Hz
0.5 ~ 10.0 (volts)
24dB / octave
18dB
50Hz ~ 150Hz
0 ~ 180 deg.
0 ~ 18dB
Damping factor
Operating frequency(band-width)
Input Sensitivity
Low-Pass crossover slope attenuation factor
Subsonic(cut/increase) range factor (15Hz ~ 40Hz)
Continuously variable low-pass control(range)
Continuously variable phase control(range)
Continuously variable bass boost control(range)
Source voltage (Automobile battery)(range)
Maximum DC current 1 Ohm, 1% THD +n
Dimensions(L x W x H)
11 ~ 16V DC
510 amperes DC *
23.75" x 11.5" x 2.5"
13.5V DC & 14.4V DC
Test voltage
Platinum RCA connectors
Strap-able; Slave-master relationship
a source voltage of 13.5V DC
Source voltage is limited to 11V~16V.
X3.71
16 Volts DC
14.4 Volts DC
12 Volts DC
Impedance Load Measurement 1%THD 5%THD 10%THD 1%THD 5%THD 10%THD 1%THD 5%THD 10%THD
4650
68.1
3400
82.5
1805
84.9
4780
69.1
3505
83.7
1860
86.3
5180
71.9
3780
86.9
2010
89.7
4450
66.7
3240
80.5
1750
83.6
4580
67.6
3330
81.6
1800
84.8
4960
70.4
3600
84.8
1945
88.2
3560
59.6
2310
67.9
1270
71.3
3670
60.5
2380
69
3950
62.8
2570
71.7
1410
75.1
RMS Wattage
RMS AC Volts
RMS Wattage
RMS AC Volts
RMS Wattage
RMS AC Volts
1 Ohm
2 Ohm
4 Ohm
1305
72.25
6500 Watt 2-second Burp Power at 16V and 10%
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4
Controls & Functions
X3.60
<Front panel>
1 0
1
2
8
3
4
7
5
9
6
<Rear panel>
14
13
11
12
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Controls & Functions
X3.71
<Front panel>
1
2
3
4
5
6
7
8
9
10
<Rear panel>
11
13
12
14
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Controls & Functions
1.Low Level OUT RCA jacks
LINEOUT LINE IN
LINEOUT LINE IN
R
L
R
X3.71
X3.60
L
The LINE OUT allows you to build multiple amplifier systems without having to use splitter
cords to distribute the signal. Now it is simply a matter of bringing one set of RCAS into the
first amplifier, then using the line out RCA jacks as the feed to the next amplifier.
2. Low Level Input RCA jacks
LINEOUT LINE IN
LINEOUT LINE IN
R
L
R
X3.71
X3.60
L
These inputs are for signal cables from the source. Always use high quality shielded RCA
cables.
3. Input Sensitivity Adjustment
LEVEL
Min
Max
This control allows you to vary the amplifier's input sensitivity between 0.5 (500 millivolts) and
10 volts. Clockwise (right-side) rotation raises the threshold and lowers the sensitivity, requiring
higher input signal voltage from the source, in order to obtain maximum output.
Counterclockwise (left-side) adjustment lowers the threshold and raises the sensitivity, requiring
a lower source voltage from the headunit. The overall objective is to set this control to some
intermediate point (0.5 - 10 volts), which closely matches the voltage produced by the headunit.
Avoid setting the threshold too low and supplying excessive input signal voltage, as this would
saturate the input stages and introduce unwanted distortion.
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Controls & Functions
4.Subsonic Filter Control
SUB
SONIC
15Hz
40Hz
Variable Subsonic Filter (15Hz - 40Hz) :
The Subsonic ꢀlter will roll oꢁ all of the unwanted frequencies below 15Hz - 40Hz.
This will allow the ampliꢀer to use that wasted power on the audible bandwidth.
5. Bass Boost Control
BASS
BOOST
0
+18dB
By using the bass boost function, bass notes at 45Hz are emphasized as much as 18dB.
X3.71
X3.60
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8
Controls & Functions
7. Low Level Filter Control
LOW
PASS
50Hz 150Hz
This control is used to set the desired low pass frequency (50 ~ 150HZ).
The filter acts to cut-off frequencies above the set-point. In general, the selected frequency
should closely match the resonant frequency of the speaker box.
8. Phase Shift Control
PHASE
SHIFT
00
180
0
The Variable phase control allows you to adjust the relative phase relationship between
your subwoofers and/or your subwoofers & other speakers in your system. This is done by
varying the control between 0 and 180 degrees.
9. Bridged Mode
BRIDGED MODE
SLAVE
MASTER
DATA LINK
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Controls & Functions
10. LED indicatior
POWER
PROTECTION
POWER : This GREEN LED will illuminate when the amplifier is turned "ON". If it fails to
illuminate, check the power connections to the Amplifier and fuses.
PROTECT: The amplifier protection circuitry will disable the amplifier if input overload, short
circuit or extremely high temperature conditions are detected. When the protection mode
is in operation, the red LED indicator on the side panel will be illuminated, indicating the
amplifier has gone into a self-preservation mode.
If you observe that the Protection LED is lit, please check the system carefully to determine
what has caused the protection circuit to engage. The amplifier can be reset by turning
the remote power off and then on again. If the amplifier shut down due to a thermal
overload condition, please allow it to cool down before restarting. If the amplifier shut
down because of an input overload or short circuit, be sure to repair these conditions
before attempting to power up the amplifier again.
11. Power(Battery positive)
X3.60
X3.71
Due to the power requirements of the Amplifier, this connection should be made
directly to the positive(+) terminal of battery. For safety measure, install an in-line fuse
-Holder (not included)as close to the battery positive(+) terminal as possible with an
ampere rating not to exceed the maximum current specified on page #3.
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Controls & Functions
12.B-Terminal (Chassis ground)
X3.60D
X3.71
To avoid unwanted ignition noise caused by ground loops, it is essential that the
Amplifier be grounded to a clean, bare, metal surface of the vehicles chassis.
Note : GROUND WIRE SHOULD NOT BE EXTENDED MORE THAN 3 FT (1 METER).
13. Remote Power On
X3.60D
X3.71
To remote wire From car stereo.
The amplifier is turned "ON" remotely when vehicle's stereo is turned "ON"
Note : IF YOUR RADIO DOES NOT HAVE +12 VOLT OUTPUT LEAD WHEN TURNED ON, THE
"REMOTE" TERMINAL ON THE AMPLIFIER CAN BE CONNECTED TO VEHICLES ACCESSORY
CIRCUIT WHICH PROVIDES +12V WHEN THE CAR IS ON.
14. Speaker Terminals
X3.71
X3.60D
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Planning and Mounting Your System
The mounting position of your Amplifier will have a great effect on its ability to
dissipate the heat generated during normal operation.
Under normal conditions, the heatsink will dissipate sufficient heat to avoid thermal
shutdown. However please do not install the amplifier in a wooden box or similar
device as this will prevent heat dissipation into the atmosphere.
Temperatures in car trunks have been measured as high as (155'F) in the summer
time. since the thermal shut-down point for the amplifier is (158'F) it is easy to
see that it must be mounted for maximum cooling capability. To achieve
maximum advantage of convection air flow in an enclosed trunk, mount the
amplifier in a horizontal position.
Cooling requirements are considerably relaxed when mounting inside the passenger
compartment since the driver will not often allow temperatures to reach a critical
point. Floor mounting under the seat is usually satisfactory as long as there is at least
1 inch of clearance (2.54 cm) above the Amplifier's fins for ventilation.
A. Select a suitable location that is convenient for mounting, is accessible for wiring.
And has ample room for air circulation and cooling.
B. Use the amplifier as a template to mark the mounting holes. Remove the Amplifier
and drill holes. Use extreme caution, inspect underneath surface before drilling!
C. Secure the Amplifier using the screws provided.
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Wiring Diagram
X3.60
SUB WOOFER
1 OHM
X3.71
SUB WOOFER
1 OHM
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Bridging Two Ampliꢀers
X3.60
SLAVE
MASTER
MASTER AMP
SLAVE
MASTER
SLAVE AMP
MASTER AMP
SPEAKER IMPEDANCE
2 OHMS
SLAVE AMP
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14
Bridging Two Amplifiers
X3.71
SLAVE
MASTER
MASTER AMP
SLAVE
MASTER
SLAVE AMP
MASTER AMP
SPEAKER IMPEDANCE
2 OHMS
SLAVE AMP
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Tuning on the Amplifier
The amplifier automatically turns on a few seconds after you turn your vehicle's ignition
switch to ACC or ON or turn on your auto sound system, depending on how you wired
the system. The POWER indicator on the top of the amplifier lights when the amplifier is on.
Important : Your amplifier requires 30 amps or more of power from your vehicle's
battery during operation. To protect your battery from discharging,
do not operate the amplifier unless your vehicle is running.
Adjusting The Audio Level
For the best performance, you must set GAIN (MIN / MAX) on the side of the
amplifier to adjust the level of the audio signals that enterthe amplifier.
1. Use a screwdriver to turn GAIN (MIN / MAX) fully counterclockwise to MIN.
2. Turn the auto sound system's volume control to about one-third of its full range.
3. Adjust GAIN (MIN / MAX) to a comfortable listening level.
4. Turn up the auto sound system's volume control until the sound begins to distort.
Then immediately turn the volume down to a point just before where the
distortion began.
Caution : Never turn up the auto sound system's volume control more than needed
to adjust the audio level, more than two thirds of its maximum volume.
5. Adjust GAIN (MIN / MAX) until the sound is at the maximum level you want the
amplifier to produce.
6. Adjust the auto sound system's volume control to a comfortable listening level.
FREQUENCY RESPONSE
BASS BOOST ON
+20dB
+10dB
0dB
35
80
-10dB
-20dB
-30dB
10
45
100
500
1K
5K
20K
50K
FREQUENCY (Hz)
NOTE: Raising the Bass frequency allows higher frequencies to reach the bass speakers
while blocking lower frequencies from midrange speakers. Lowering the Bass
frequencies allows lower frequencies to reach the midrange speakers while
blocking higher frequencies from bass speakers.
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Trouble Shooting
SYMPTOMS
NO SOUND
CHECK
REMEDY
Is the power
LED illuminated?
(NO)
Check all fuses to amplifier.
Be sure Turn-on lead is connected
Check signal leads.
Check gain control.
Check Tuner/Deck volume level.
Clean contacts on fuse holders.
Is the Diagnostic
LED illuminated? (YES)
Check for speaker short or
amplifier overheating.
No power to power wire
Repair power wire or connections.
Check connections to radio.
AMP NOT
SWITCHING
ON
No power to remote
wire with receiver on
Replace fuse
Burnt or broken fuse
NO SOUND
IN ONE
CHANNEL
Check Speaker Leads
Inspect for short circuit or an
open connection.
Check Audio Leads
Reverse Left and Right RCA inputs
to determine if the problem is
occurring before the amp.
Be sure proper speaker load
impedance recommendations
are observed.
Check Speaker load
impedance
AMP TURNING
OFF
MEDIUM /
HIGH
VOLUME
(If you use an ohmmeter to check
speaker resistance, please
remember that DC resistance and
AC impedance may not be the same.)
PROTECTION
LAMP ON
Shut down
Turn radio down
Wait for AMP to cool
Speaker wires shorted
Separate speaker wires and
insulate
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