Soundstream Technologies Stereo Amplifier SA120 User Manual

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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