Soundstream Technologies Class A 5.0 Installation, Coherent Stereo Mixed-Mono /Bridged Mono

INSTALLATION STEP 1

COHERENT STEREO™ /

MIXED-MONO / BRIDGED MONO

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

Coherent Stereo™ with identical left and right stereo channels for maximum fidelity. Best choice for satellite speakers. Use this mode unless Mixed-Mono is necessary.

Mixed-Monoin 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.

Bridged Mono 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.

In bridged mono, only the right channel input is active.

NOTE: If you intend to drive a REFERENCE Class A amplifier in Mono but have stereo outputs from your crossover or source unit, you can put the switch in

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INSTALLATION STEP2

BALANCED / UNBALANCED INPUT

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

	UNBALANCED INPUT	BALANCED INPUT
ADVANTAGES	1. Most preamplifier / source	1. Improved Signal to Noise
	units have "UNBAL" RCA	Ratio. (S/N Ratio)
	outputs. (Industry stan-	2. Excellent noise cancellation
	dard)	characteristics.
	2. No Interface module is nec-	3. Immune to noise radiated in
	essary	the car audio environment.

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.

Using the "Unbalanced" RCA input

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.

Using the "Balanced" RCA input

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

NOTE: The pin configuration shown in the diagram is the view looking into the Balanced input jack on the amplifier.

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