Soundstream Technologies Class A 10.0 Mode D'Emploi

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The REFERENCE Class A amplifiers have the ability to operate in any one of 
the following modes: 

 with identical left and right stereo channels for 

maximum fidelity.  Best choice for satellite speakers.  Use this mode unless 
Mixed-Mono is necessary. 

 in order to drive stereo and mono simultaneously; works well 

for center channels.  It can be used anytime you need a summed mono 
channel.  Somewhat sacrifices sonic accuracy as additional circuitry is 
introduced to one channel.  In Mixed-Mono, the left channel is inverted, see 
diagram below or on the bottom of the amplifier. 

 for dedicated single channel operation; ideal for driving 

subwoofers.  It is also used when large amounts of power are necessary for 
single speakers.  In bridged mono, only the right channel input is active. 

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The REFERENCE Class A amplifiers have the ability to accept either a 
standard Unbalanced RCA signal inputs, or a Balanced "Pro Audio" inputs with 
the use of the Soundstream BLT Balanced Line Transmitter or some other 
balanced line audio source.  Before installing your system, you should decide 

The REFERENCE Class A amplifiers' signal inputs accept two ranges of input 
signal levels:  0.2 - 2.0 Vrms, or 0.5 - 5.0 Vrms for both Balanced and 
Unbalanced inputs.  The input range switch position and level settings are 
dependent upon the preamplifier / source unit output signal level.  For the best 
system Signal to Noise Ratio, we recommend that the input level controls be 
set as far down as possible (rotated counter-clockwise), while maintaining an 
acceptable level of output. 

 

 
When using the Unbalanced RCA input, the RIGHT channel input signal 
switch  MUST be in the "UNBAL" position.  Also, when first installing the 
amplifier using this input configuration, we suggest that the left channel input 
signal switch be in the "UNBAL" position as well.  If you experience 
alternator wine or other installation noise with both switches in the 
"UNBAL" position, try moving the LEFT channel input signal switch to 
the "BAL" position.  This should remove any system noise due to 
installation. 
 

 
When using the Balanced 6-pin DIN input, both switches MUST be in the 
"BAL" position.  Also, we recommend that when using this input configuration, 
the "INPUT LEVEL" switch be in the "0.5 - 5V" position, and the gains on the 

 

 

 

 

1. Most preamplifier / source 

units have "UNBAL" RCA 
outputs.  (Industry stan-
dard) 

2. No Interface module is nec-

essary 

1. Improved Signal to Noise 

Ratio. (S/N Ratio) 

2. Excellent noise cancellation 

characteristics. 

3. Immune to  noise radiated in 

the car audio environment.