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d Line input 3, left (L) and right (R) — A line level audio source, such as a CD player,
output from a switcher, DVD player, or other audio device, may be connected to
the 5-pole 3.5 mm captive screw connector. Line inputs provide gain settings to
accommodate consumer and pro operating line level sources. Balanced or unbalanced
stereo connections can be wired to this connector (see the following example
diagram).
DVD
CSR 6 RCA Adapter
MAIN 3
LR
MVC 121 MAIN wiring.eps
NOTE: Input devices cabled with two RCA male outputs may be connected to the
5-pole 3.5 mm captive screw connector using the Extron CSR 6 adapter,
part number 26-575-01, as shown above.
To wire the captive screw connectors to the RCA or 3.5 mm mini phone plugs, see the
following illustrations below.
Tip (+)
Sleeve ( )
RCA Connector
Sleeve ( )
Ring (R)
Tip (L)
3.5 mm Stereo
Plug Connector
Balanced audio
Tip
Ring
Tip
Ring
LR
Sleeves
Unbalanced audio
Tip
Sleeve
Sleeve
Tip
LR
Do not tin the wires!
e Variable output left (L) and right (R) — The balanced/unbalanced stereo output
to an amplifier from the 5-pole 3.5 mm captive screw connector is controlled by the
large main volume control knob on the front panel. See the Front Panel Features
section. Volume range is from 0 to 100%, or -100 to 0 dB.
Adjust the speaker volume by using the following sequence:
1. Adjust the volume of the amplifier down to its minimum setting.
2. Adjust the main volume knob of the MVC to its default level of 100% volume, or
0 dB.
3. Adjust the volume of the amplifier to the desired level.
4. Make subsequent volume level adjustments by using the volume knob of the
MVC.
NOTE: Output devices cabled with two RCA male outputs may be connected
to the 5-pole 3.5 mm captive screw connector using the Extron CSR 6
adapter, part number 26-575-01, as shown in the following illustration.
MVC 121 Plus • Installation 6