VOLUME CONTROL BYPASS INPUT MODE
The preDAC includes a Volume Control Bypass (VCB) input mode that removes the
built-in output level control from the signal path. This is useful when using digital sources
that have their own volume control built in that you prefer to use for convenience.
When an input is selected, the LED will light blue if VCB mode is disengaged (the built-
in volume control is in the signal path) or green if VCB mode is engaged (the volume
control in the source device must be used).
To set up Volume Control Bypass mode:
1. Make sure the connected device is set to a low volume level!
2. Press and hold the desired input button for ~5 seconds to engage the VCB input
mode, indicated by the input LED turning green. Note: repeat this step to disengage
the VCB input mode, indicated by the input LED turning blue. VCB input mode
disengaged is the factory default setting.
The Volume Control Bypass feature is not available on the AUX-2/PHONO input.
Pressing and holding the AUX-2/PHONO input for ~10 seconds activates the PHONO
(green LED) input mode. Pressing and holding this button for ~5 seconds deactivates
the PHONO input mode (blue LED).. This feature is unique to the AUX-2/PHONO
input.
Caution: when the preDAC is in VCB input mode, the source device is in complete
control of the output level sent to the power amplifier and speakers. If extra care is not
taken, significant damage to the speakers or power amplifier may occur. Peachtree
Audio does not accept any responsibility for damage caused by improper setup or use
of this feature.
LOOP FEATURE
LOOP OUTPUT & LOOP INPUT: This is a loop feature (similar to a processor or
tape monitor loop) with an output and input that are tied together to allow an audio
processing device to be inserted into the signal path of the currently selected input.
The loop is active when the LOOP Button LED on the front panel is lit blue. The loop is
engaged and disengaged using the LOOP button on the front panel or remote control.
Please note that when the loop is active, the audio signal from the preDAC is output
on the LOOP OUTPUT connectors and the audio signal output from the connected
device is looped back into the LOOP INPUT connectors on the preDAC. Improper
wiring or use of this feature may result in no audio when the loop is engaged. When
the loop is disengaged, the circuit is completely bypassed to shorten the audio signal
path and minimize potential interference.
To set up Loop Feature mode:
1. Turn off the preDAC and the device to be connected.
2. Connect the LOOP OUTPUT connections on the preDAC to the input connections
on the external processing device.
3. Connect the output connections on the external processing device to the LOOP
INPUT connections on the preDAC.
4. Turn on the preDAC and the connected device.
5. Press the LOOP button on the front panel or remote control to engage (LED lit
blue) and disengage (LED off) the connected device from the signal path.
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