Ensemble Designs 6600 Series Analog Audio DAs and Frame Models 6601, 6601R and Frame 6600 - Manual (Page 5)

Model 6600 Analog Audio DAs and Frame
6600-5
6601 ANALOG AUDIO DA
Description
The 6601 Analog Audio Distribution Amplifier (DA) is a modular, high performance audio
distribution amplifier intended for studio quality audio distribution systems. It is
designed to be operated from the 6600 audio mounting frame.
The module can be configured as a 1 input by 8 output monaural, or as two, 1 input by 4
output stereo amplifiers, just by moving one internal jumper. In the MONO mode only the
Channel A input connectors are used.; the Channel B input is left unconnected.
All inputs can be connected balanced or unbalanced. Outputs are always balanced. Both
preset and variable gain controls are available which will provide a gain range of – 6 to
+ 33 dB.
Each module has its own on-board voltage regulators with fuse protection. Any failure of a
single module will not effect any other.
Installation
The 6600 audio distribution amplifier is designed to be mounted in the 6600 audio
mounting frame, (up to twelve modules can be installed). There are no special cooling
requirements, although care should be taken to ensure that extremely hot equipment is
not installed directly beneath the frame.
It is recommended that when redundant power supplies are included in the frame, the
two power cords be connected to different AC supplies. In this way the frame will continue
to operate even if there is a partial failure of plant power.
Before installing the module in the frame, it is necessary to set three internal jumpers to
the desired mode. Jumper H2 selects either MONO or STEREO mode, and jumpers H1
and H3 set the desired gain of each channel. Jumpers and gain controls are illustrated in
the figure below.
+27 dB +18 dB
+9 dB
0 dB
+27 dB +18 dB
+9 dB
0 dB
H1
RV
3
RV
1
RV
2
RV
4
MONO
STEREO
H3
H2
CH A GAIN
CH B GAIN
CH B BALANCE
CH A BALANCE
6601 Component Side View