Soundstream Reference Series 644S Installation Manual page 5

SAMPLE SYSTEM #5
2 channels of RCA input
to drive virtually any load—all the way down to 1/2 ohm stereo (1
2 bridged channels of low pass output
ohm mono).
RCA line output set to high pass
Line output to an external amplifier driving satellite speakers
Dual Discrete Class A Drive Stages - Over six times the drive
current of most amplifiers, which maintains performance into low
impedance loads.
TM
Drive Delay Muted Turn-on/off Circuit - A unique circuit which
completely eliminates any amplifier-related turn-on/off noises.
Flexible Dual Input Level Sensitivity accepts 2 voltage ranges;
from 200 mV to 2.0 V and from 500 mV to 5.0 V, permitting
maximum output from the amplifier with virtually any source unit.
Differential Balanced Input Design for added immunity to noise
caused by component and vehicle electrical system interaction when
using unbalanced RCA inputs.
True Balanced Input for professional-quality performance and noise
cancellation. The 6-pin din plug carries (+) and (-) Signal information
for left and right channels, audio ground, and ±15 Vdc to operate the
Soundstream BLT Balanced Line Transmitter.
AIRBASS™ Upgradable - This feature allows RF remote control
level adjustment while the low pass filter on the amplifier's internal
crossover is being used.
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