8
Reference700s
17
BALANCED / UNBALANCED INPUT
The REFERENCE 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 upon
The REFERENCE 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
UNBALANCED INPUT
BALANCED INPUT
ADVANTAGES
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.
INSTALLATION STEP 2
NOTE: The pin
configuration shown
in the diagram is the
view looking into the
Balanced input jack
on the amplifier.
