Rolls Stereo Receiver DB24 User Manual

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INTRODUCTION
Thank you for purchasing the DB24 Stereo Direct Interface. This sturdy device is
designed and manufactured to the most demanding specifications in order to provide
years of faithful survice. The DB24 converts high impedance audio signals to low
impedance via Rolls proprietary audio transformers, and a variety of inputs.
DESCRIPTION
FRONT PANEL
- L.Ster: 1/4" Tip-Ring-Sleeve jack for connection to a "Left" portion of a signal, or
a Tip-Ring-Sleeve "Stereo" signal.
- Left Level: Adjusts the input level to the Left channel.
- L & R: Stereo RCA jacks, for connection to an unbalanced stereo signal. Note:
The Right and Left jacks may be used individually as well.
NOTE: The Red RCA jack connects to the Right Out, and the White RCA jack
connects to the Left Out.
- St. IN: 1/8" (3.5mm) Tip-Ring-Sleeve jack for connection to an unbalanced Stereo
signal
only
.
- Right Level: Adjusts the input level to the Right channel.
- R. Mon: 1/4" Tip Sleeve jack for connection to the "Right" portion of a stereo
signal, or to a "Mono" signal.
REAR PANEL
NOTE: DESCIPTIONS FOR THE FOLLOWING ARE IDENTICAL FOR
THE LEFT AND RIGHT OUTPUTS.
- Grou
nd L
ift (La
beled
"gnd/lift"):
When
positioned to the side of the
switc
h lab
eled
"lift", the
shield of the XLR plug is separated f
rom the ground pin (pin 1).
- Left/Right OUT: Balanced XLR jacks - for connection to mixer inputs, amplifiers,
etc.
SCHEMATIC
CONNECTION / OPERATION
1/4" Jacks:
1/4" Jacks:
Stereo Operation
Stereo Operation
:
A. Individual Right and Left connections - Connect Tip-Sleeve 1/4" plugs to the
Right and Left Input jacks.
B. Stereo Tip-Ring-Sleeve connection - Connect a Tip-Ring-Sleeve 1/4" plug to
the Left/Stereo Input jack.
IMPORTANT NOTE: Connecting a Tip-Sleeve MONO
plug into this jack, with nothing connected to the Right/Mono Input will
result in the Right/Mono Input being shorted to ground.
1/4" Jack: Mono Operation
1/4" Jack: Mono Operation
: Connect a Tip-Sleeve Mono plug to the Right/Mono
Input.
1/8" (3.5mm) Jack
1/8" (3.5mm) Jack
: Connect a Tip-Ring-Sleeve stereo plug into this jack for stereo
operation only.
NOTE: Connecting a Tip-Sleeve MONO plug into this jack, with
nothing connected to the Right/Mono 1/4" Input will result in the Right/Mono
Input being shorted to ground.
RCA Jacks
: Connect Stereo RCA plugs into these jacks for stereo or dual-mono
operation.
Connect XLR outputs to the next device in your signal chain.
Adjust the Right and Left Level controls for an appropriate input level. For ex-
ample, for maximum amount of attenuation (least amount of signal), turn the Level
control to -60. For minimum attenuation (maximum signal), turn the Level control
up to -20.

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