Soundstream USA 180 Owner's Manual
PARALLEL/SERIES WIRING DIAGRAMS
USA•100
two 4 ohm woofers
in parallel = 2 ohms
SOUNDSTREAM TECHNOLOGIES
120 Blue Ravine Road Folsom California 95630 USA
ph 916.351.1288 fax 916.351.0414 ver. 1.17.96a
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two 4 ohm woofers
in series = 8 ohms
&
USA•180
Power Amplifiers
OWNERS MANUAL AND
INSTALLATION GUIDE
1
CONGRATULATIONS!
You now own a Soundstream Amplifier, the result of a unique design and
engineering philosophy.
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 amplifiers are the result of American craftsmanship and the
highest quality control standards. When properly installed, they will provide
you 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.
Serial # __________________________________________________
Dealer's Name _____________________________________________
Date of Purchase ___________________________________________
Installation Shop ___________________________________________
Installation Date ____________________________________________
SERVICE
Your Soundstream amplifier is protected by a limited warranty. Please read
the enclosed warranty card.
SPECIFICATIONS
POWER OUTPUT
USA•100
USA•180
THD < 0.1%
Signal to Noise > 90 dB
Frequency Response 20 Hz to 20 kHz +/- 0.5 dB
Stereo Separation > 90 dB
Power
4 ohms
40w x 2 60w x 2
60w x 2 90w x 2
Power
2 ohms
Bridged Power
4 ohms
100w x 1
180w x 1
CAUTION!
Prolonged listening at high levels may result in hearing loss.
Even though your new Soundstream amplifier sounds better than
anything you’ve ever heard, exercise caution to prevent hearing
damage.
2
Damping > 200
Input Sensitivity 100 mV - 2.5 V
Input Impedance 12 k ohms
CROSSOVER SPECIFICATIONS
High Pass: 12 dB/octave, factory set at 150 Hz
Low Pass: 12 dB/octave, factory set at 75 Hz (fixed on USA•100)
DIMENSIONS
USA•100: 7-1/8” W x 8-3/16” D x 2-3/16” H
USA•180: 8-1/2” W x 8-3/16” D x 2-3/16” H
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PROTECTION CIRCUITRY
Your USA amplifier is protected against both overheating and short circuits by
means of the following circuits:
• Main power supply fuses.
• Speaker output circuit breakers.
• A fail-safe thermal protection circuit activating at 95°C.
NOTE: If 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.
TROUBLESHOOTING
PROBLEM CAUSE
No sound and LED is not lit
Repeatedly blown amp fuse, frequent activation of Thermal Protection Circuit
• no power or ground at amp
• no remote turn-on signal
• blown fuse near battery
• blown amp power supply fuse
• check speaker configuration—
impedance may be less than 2
ohms stereo or 4 ohms mono
• speaker or leads may be shorted
• verify adequate amplifier ventila-
tion
TABLE OF CONTENTS
USA•100 Diagram ....................................................... 4 - 5
USA•180 Diagram ....................................................... 6 - 7
Features ........................................................................... 8
Crossover Modes ............................................................. 9
Crossover Adjustments (USA•180 only) ......................... 10
Selecting Input Modes .................................................... 11
Wiring & Wiring Diagram ......................................... 12 - 13
Installation and Mounting ............................................... 14
Level Setting .................................................................. 15
Sample Systems ..................................................... 16 - 21
Protection Circuitry & Troubleshooting ........................... 22
Service ........................................................................... 23
Specifications ................................................................. 23
22
3
USA•100
USA•180
4
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