245
Power Amplifiers
OWNERS MANUAL AND
INSTALLATION GUIDE
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TABLE OF CONTENTS
You now own a Soundstream Amplifier, the result of a unique design and
engineering philosophy.
Diagram.. ........................................................
Diagram..
4 5
6 -7
8 - 9
To maximize the performance of your system, we recommend that you
thoroughly acquaint yourself with its capabilities and features. Please retain this
manual and your sales and installation receipts for future reference.
Soundstream
are the result of American craftsmanship and the
provide you
Diagram
..........................................................
highest quality control standards, and when properly installed,
with many years of listening pleasure. Please record the following information
which will help protect your investment should your amplifier ever need
replacement or service..
Features
Crossover Modes and Adjustments..
.........................................................................
.......................
11 12
Serial
Selecting Input Modes..
..................................................
Dealer’s Name
Date of Purchase
Installation Shop
Installation Date
Wiring Wiring Diagram..
Installation and Mounting..
14 15
.......................................
..............................................
Level Setting
..................................................................
Sample Systems .....................................................
18 21
...........................
Protection Circuitry Troubleshooting
Service
3
Specifications..
...............................................................
2
3
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Key to
1 .
Connected to fuse or circuit breaker, then battery’s positive post.
2.
Ground Main ground connection. Bolt to a clean chassis ground in the
vehicle.
3.
4.
5.
Remote Remote turn-on input from the head unit. Accepts
LED Indicates amplifier power on.
Speaker Output Connections Channels 1
2
6. Crossover Output Low level output to auxiliary amplifier for high or low
pass.
Top
(partial)
7.
6.
Bass EQ Adjustable bass equalization circuit, Cl to
Input Level Variable from to
boost at 45 Hz.
1
2
3
5
6
7
6
9
9. Inputs Right and left channel inputs; only right channel input used in
“Mono” mode.
[underside] Main Fuse Main power supply fuse. Replace only with
same fuse value.
[underside] Crossover
amplifier and crossover line outputs.
Crossover frequency settings for
11.
12.
Side view
[underside] Stereo/Bridged Mono Switch Select “Mono” for bridged
operation (use only right channel input) or “Stereo” for
I
-
Stereo or
Mixed Mono operation; See crossover section for more details.
[underside] Line Out Crossover Switch Select high pass, low pass, or
full range operation of crossover outputs.
13.
14.
15.
[underside] Amplifier Crossover Switch Select high pass, low pass, or
full range operation of amplifier.
[underside] Bass EQ Switch On/Off switch for bass equalization circuit.
Underside
4
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Key to Cailouts
Connected to fuse or circuit breaker, then battery’s positive post.
1.
2.
Ground
vehicle.
Main ground connection. Bolt to a clean chassis ground in the
3.
4.
5.
6.
Remote Remote turn-on input from the head unit. Accepts
LED Indicates amplifier power on.
Speaker Output Connections Channels 1 & 2
High Pass Crossover Output
Low level high pass outputs to auxiliary
amplifier.
7.
Bass EQ
Adjustable bass equalization circuit, 0 to boost at 45
Hz-Channels 1
2.
8. Input Level Variable from
9.
to
Inputs Right and left channel inputs; only right channel input used in “Mono”
mode-Channels 1 2.
Speaker Output Connections Channels 3
Low Pass Crossover Output Low level low pass output to auxiliary amplifier.
Bass EQ Adjustable bass equalization circuit, 0 to boost at 45
Hz-Channels 3 low pass output.
13. Input Level Variable from to
14.
1
2.
IO.
11,
12.
4
4
3
4.
Inputs Right and left channel inputs; only right channel input used in “Mono”
mode-Channels 3 4.
15. [underside] Main Fuse Main power supply fuse. Replace only with same fuse
value.
16.
[underside] Xover
Crossover frequency settings for amplifier and
outputs-channels 1 2 8 high pass and low pass outputs.
17. [underside] Xover
outputs-Channels 3
Crossover frequency settings for amplifier and
low pass outputs.
4
18. [underside] Stereo/Bridged Mono Switch
Select “Mono” for bridged
operation (use only right channel input) or “Stereo” for 2-channel Stereo or
Mixed Mono operation; See crossover section for more details-Channels 1 2.
19. [underside] Amplifier Crossover Switch Select high pass, low pass, or full
range operation-Channels 1 & 2.
20. [underside] Bass EQ Switch
circuit-Channels 1 2.
[underside] Stereo/Bridged Mono Switch
On/Off switch for bass equalization
2i
21.
Select “Mono” for bridged
Underside View
operation (use only right channel input) or “Stereo” for
Mixed Mono operation; See crossover section for more details.
Stereo or
22. [underside] Amplifier Crossover Switch Select high pass, low pass, or full
range operation-Channels 3 4.
On/Off switch for bass equalization
23. [underside] Bass EQ Switch
circuit-Channels 3 4.
24
[underside] Input Select Selectable inputs from internal (from channels 1
2) or external.
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Key to
1.
Connected to fuse or circuit breaker, then battery’s positive post.
2.
Ground Main ground connection. Bolt to a clean chassis ground in the
vehicle.
3.
Remote Remote turn-on input from the head unit. Accepts
2V.
4. LED indicates amplifier power on.
5.
6.
Speaker Output Connections Sub Channels.
Bass Adjustable bass equalization circuit, 0 to
boost at 45
Hz-Sub Channel only.
7.
8.
Input Level Variable from 40mV to
Channel.
Inputs Right and
channel inputs; Subwoofer Channel.
9. Speaker Output Connections Channels 1
IO.
2
Input Level Variable from
to
1
2.
11. Inputs Right and left channel inputs; only right channel input used in
“Mono” mode-Channels 1 2.
n
12.
Speaker Output Connections Channels 3
13. input Level Variable from 1 to
4
3
4.
14.
Inputs Right and left channel inputs; only right channel input used in
“Mono” mode-Channels 3 4.
15.
[underside] Main Fuse Main power supply fuse. Replace only with same
fuse value.
18. [underside] Xover S.I.P.
Crossover frequency setting for subwoofer
channel.
17.
[underside] Bass
Switch On/Off switch for bass equalization
circuit-Subwoofer Channel.
18. [underside) Subwoofer Input Select
internal (Channels l-4) or external.
19. [underside] Amplifier Crossover Switch
Selects sub channel input from
Select high pass or full range
operation-Channels 1
20. [underside] Stereo/Bridged Mono Switch “Mono” for bridged operation
(use only right channel input) or “Stereo” for Stereo or Mixed
Mono operation; See crossover section for more details-Channels 1 2.
21. [underside] Amplifier Crossover Switch Select high pass or full range
operation-Channels 3 4.
[underside] Input/Stereo/Bridged Mono Select
2.
22
Selectable inputs from
internal (from channels 1 2) or external and stereo or mono-Channels 3
4. “Mono” for bridged operation (use only right channel input) or “Stereo”
for 2-channel Stereo or Mixed Mono operation.
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INSTALLATION STEP 1
DESIGN FEATURES
SETTING THE CROSSOVER MODES
Handcrafted in the U.S.A. with
glass epoxy circuit boards, low-loss
connections, gold plated input connectors, and metal film resistors.
The Soundstream
electronic crossover for each of their pairs of
as well as the outputs
244,
245 incorporate a replaceable S.I.P.
channel only on
244, 245
Darlington High Current Discrete Output Topology Soundstream’s
“overbuilding” of the output section incorporates Darlington output devices
sandwiched between the circuit board and the heat sink in a design called
to ensure cool, efficient amplifier operation.
&
The
amplifiers can drive a complete system without need of an outboard electronic
crossover.
Before installing the amplifier, make certain the switches on the bottom are set
to the correct positions and hole plugs are installed on the bottom of the
amplifier.
Mixed Mono Capable so you can simultaneously drive a stereo and mono
load (satellites and subwoofer).
2 Ohm Drive Ability Soundstream SA Series amplifiers are designed to
drive loads down to 2 Ohms stereo and 4 Ohms bridged.
CHANNELS 1
2
CHANNELS 3
4
Built-in Staggered Asymmetrical Crossover Built in
electronic
crossover is designed to send either high or low pass information to the
amplifier. Outputs are included to drive another amplifier with either high or
low pass information
Bass EQ Adjustable bass equalization circuit allows you to boost bass by
as much as
at 45 Hz. A built in subsonic filter protects speakers.
Drive Delay” Muted Turn-on/off Circuit A unique circuit which
completely eliminates any amplifier-related turn-on/off noises.
LOW PASS
Flexible Input Sensitivity Accepts input voltages from 100
to 2.5 V
The low pass crossover is used for sending only low frequency information to
particular speakers (or crossover outputs). Activate the low pass crossover if
you intend to drive subwoofers.
(from 40
to 2.5 V on the
subwoofer channel), which permits
maximum output from amplifier with virtually any source unit.
“Balancing Act” Input Topology for added immunity to ground loops
caused by component and vehicle electrical system interaction.
HIGH PASS
The high pass crossover is used for sending only midrange and high frequency
information to particular speakers (or crossover outputs). Activate the high pass
crossover if you intend to drive satellite or coaxial speakers in the system along
with subwoofers. Even if your system does not include subwoofers, it may be
helpful to activate the high pass crossover with smaller speakers to protect them
from low frequency information.
Bridged Power
4 ohms
Power
4 ohms
Power
2 ohms
NOTES on the
High Pass
is
& 2
I &
To
Pass
the
P.
change’
I
Low Pass RCA
To the
Channels 3 4 Low Pass
inputs.
‘2 and
be
x 1
150wx 1
Low
identical
the Low Pass
11
1 0
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INSTALLATION STEP 2
In most car audio installations, there is a tendency for a
boom.”
Your multi-channel Soundstream amplifiir
either one or two pairs of stereo inputs (three with the
has front and rear outputs, you can take advantage of its fading capability by
driving the multi-channel amplifiers with two pairs of input
another amplifier, you can drive it with the outputs of the
can be driven
If your source unit
Because of their interior dimensions, most cars will resonate or ring at these
frequencies. If we design the system so there is less musical
information in this region, the final response is very smooth and natural
sounding.
In addition, if you have
or 244. When
operating a pair of amplifier channels in mono, only one input is necessary.
The
244,
On
amplifiers, pairs of channels may be bridged for mono
incorporate a
electronic crossover. The high
and low pass portions of the
crossover
independent of one another.
staggered
operation. To do so, simply put the stereo switch into the ‘mono” position and
follow the mono wiring (Right Positive goes to speaker’s positive; Left Negative
goes to speaker negative).
can
be
set
Stereo for normal operation.
Below is a chart of S.I.P. values
which can be used for changing
the factory preset crossover
points (low pass only on SA-245).
in order to drive stereo and mono simultaneously; works well for
center channels. It can be used anytime you need a summed mono channel. It
also makes for a cost-effective means of driving an entire system with only 2
channels of amplification.
vet
for dedicated single channel operation; ideal for driving
It is also used when large amounts of power are necessary for
FREQUENCY RESISTOR VALUE
COLOR CODE
subwoofers.
single speakers.
mono,
the
channel input (per
of
53 Hz
Green-Green
channels) is active.
73 Hz
a9 Hz
107 Hz
Green-White
MIXED MONO
STEREO
MONO
Use R Input Only
Violet-Green
Violet-White
145 Hz
11
a.2 K
288 Hz
485 Hz
5.6
K
3.3 K
2.0 K
MONO
NOTE:
following formula may be used to
values in
resistor packs. The
is
to
by the
use
4
valued
of 296 or tighter tolerance.
the
of
the S.I. P.
12
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INSTALLATION STEP 3
{Continued from page 14)
WIRING
INTERNAL
The Soundstream amplifiers are fused internally with automotive-type fuses.
The fuses are accessible via a plastic plug on the bottom of the amplifier. Never
replace the fuses with a higher value than what is supplied. This may
POWER AND GROUND
To assure maximum output from your amplifier, use high quality, low-loss power
and ground cables. Soundstream SA amplifiers incorporate gold-plated barrier
strips for maximum power transfer and protection from corrosion. The screw
terminals back out for use with spade & ring terminals, as well as bare wire.
Determine from the chart below the minimum gauge power and ground wire for
your application.
result
amplifier damage and
void
warranty!
REMOTE TURN-ON
Connect the ‘Remote” to the turn-on lead from the source unit.
is received, the amplifier will on.
volts
up
up to 20’
Depending on your application and amplifier
244, or
you may
Soundstream Power80
use one, two, or three pairs of signal cables to drive your amplifier. To
guarantee optimum performance, use a high-quality cable that will be easy to
install and has minimal signal loss.
Soundstream Power80
Soundstream Power80
SPEAKER CABLE
Use a high quality, flexible, multi-strand cable for best performance and
longevity. Soundstream Speaker120 & 160 (12 16 gauge) are ideal.
Soundstream Power80
or
00
or 8 or 10 ga.)
WIRING DIAGRAM
CIRCUIT BREAKERS/FUSES
EXTERNAL
Like all other amplifiers, the Soundstream
must be fused near the
battery. A fuse or circuit breaker must be located within 18” of the battery. This
will prevent a fire in the event of a shorted cable. See the chart below to
determine the value of your battery fuse/circuit breaker.
Model
Amplifier Fuse
Battery Fuse/
Circuit Breaker
25 amp automotive
30 amp automotive
30 amp automotive
30 amp
40 amp
40 amp
(Continued on page 15)
HEAD UNIT
14
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INSTALLATION STEP 4
6
LEVEL SETTING
INSTALLATION AND MOUNTING
The input levels are adjusted by means of the input level controls located on the
front of the amplifier.
AMPLIFIER LOCATION
The SA amplifiers employ highly efficient circuitry and a unique
design to maintain lower operating temperatures. Additional cooling may be
required if the amplifier is located in a tightly confined area, or when driving
especially low impedance loads at extremely high levels.
In the ideal situation, all components in the audio system reach maximum
undistorted output at the same time. The reason is because an amplifier will
only make what comes into it bigger. So, if you send it a distorted signal from
the head unit, it is going to amplify distorted information. The same thing holds
true if an outboard processor or crossover begins to distort before you have
maximum output from the amplifier. By setting all components to reach clipping
at the same time, you can maximize the output of your system.
When mounting the amplifier, it should be securely mounted to either a panel in
the vehicle or an amp board or rack that is securely mounted to the vehicle. The
mounting location should be either in the passenger compartment or in the trunk
of the vehicle, away from moisture, stray or moving objects, and major electrical
components. To provide adequate ventilation, mount the amplifier so that there
are at least two inches of freely circulating air above and to the sides of it.
Follow the below procedure for the quickest, easiest means of setting the levels:
1. Turn the amp’s input levels to minimum position (fully counter-clockwise).
2. Set source unit volume to approximately 314 of full volume.
2. S W I T C H E S
Set Input and Crossover switches to the appropriate positions (see pages 18
21). Be sure to re-install the plugs included with the amplifier.
3. While playing dynamic source material, slowly increase the amplifier’s
input level until a near maximum undistorted level is heard in the system.
3. MOUNTING THE AMPLIFIER
a. Using the amplifier as a template, mark the mounting surface.
b. Remove the amplifier and drill the holes.
c. Mount the amplifier to the surface using the provided hardware.
NOTE: Your best combination of output and Signal to Noise ratio will be
4.
when the input levels
set between
and
a. Route and connect the audio signal and remote turn-on cables to the
amplifier from the source unit.
b. Carefully run the positive cable from the amplifier to a fuse or circuit
breaker within 18 inches of the battery.
c. Then connect the fuse or circuit breaker to the battery. Leave the circuit
breaker off or the fuse out until everything is bolted down.
d. Secure the ground cable to a solid chassis ground on the vehicle. It may be
necessary to sand paint down to raw metal for a good connection.
e. Double check each and every connection!
f. Re-connect the fuse or circuit breaker.
5. POWER UP
Power up the system and look at the LED and it should be lit. There may be a
2
3 second delay from the time the source unit is turned on to the time the LED
on the amp turns on, which is normal. Once the amplifier power LED is on and
the source unit is playing, you should have sound coming from the speakers.
16
17
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20
pass outputs to an
amplifier
SOUNDSTREAM
Stereo amplifier in high pass; low pass
auxiliary amplifier
output to an
HEAD UNIT
SOUNDSTREAM
18
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h pass;
an
2 channels of
2 channels in
2 channels of input; 2 bridged channels
in low pass, high pass output to an
auxiliary amplifier
pass, mono channel in low pass
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SERVICE
PROTECTION CIRCUITRY
Your Soundstream amplifier is protected by a limited warranty. Please read the
enclosed warranty card.
Your SA amplifier is protected against both overheating and short circuits by
means of the following circuits:
l
l
l
Main power supply fuses.
A fail-safe thermal protection circuit activating at 95°C.
Self-resetting circuit breakers to protect against short circuits.
SPECIFICATIONS
NOTE: you experience blown main power supply fuses, DO NOT increase
values beyond the original values! Doing so will void your warranty and may
damage your amplifier.
POWER OUTPUT
Bridged
1
2
Stereo
Stereo
I
I
I
TROUBLESHOOTING
150wx 1
0.5
1
PROBLEM
CAUSE
0.1%
THD
No sound and LED is not lit
l
l
l
no power or ground at amp
no remote turn-on signal
blown fuse near battery
Signal to Noise
Frequency Response
Damping
20 Hz to 20
200
Repeatedly blown amp fuse,
frequent activation of Thermal
Protection Circuit
l
check speaker
impedance may be less than 2
ohms stereo or 4 ohms mono
100
Input Sensitivity
(40
12 k ohms
400 out
2.5 V on the
subwoofer channel)
l
l
speaker or leads may be shorted
verify adequate amplifier
ventilation
Input Impedance
Crossover Output
100
input at 1
No sound from channels 3 4 with
2 channels of input
l
l
check input settings on bottom of
amplifier-switch should be set to
inputs “1 & 2”
CROSSOVER SPECIFICATIONS
High Pass: 12
Low Pass: 12
24
shipped with 160 Hz S.I.P. (fixed on
shipped with 80 Hz S.I.P.
shipped with 80 Hz S.I.P.
Channels cut in and out
circuit breakers are activating.
Check for a possible short in the
speaker wire or in the speaker
itself
verify that the impedance of the
load is at or above the minimum
rated impedance
DIMENSIONS
W x
W x
W x
D x
D x
D x
H
6” H
H
13-l
l
23
22
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DIAGRAMS
Amplifier
Amplifier
4 Ohm
Ohm
two 4 ohm woofers
two 4 ohm woofers
in series 8 ohms
in parallel 2 ohms
C
H
0
L
0
G
I
S
SOUNDSTREAM TECHNOLOGIES
120 Blue Ravine Road Folsom California 95630 USA
ph 916.351.1288 fax 916.351.0414
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