The XLR/RCA Switch selects which input connector feeds
audio to the priority signal chain.
The PAD Switch attenuates the incoming audio of either
the XLR or RCA inputs by 20dB. This is useful for
controlling high level signals that could clip the electronic
preamp stages.
The PRIORITY ZONE VOLUME OVERRIDE Switches
select how the Priority Input signals from P1 and P2 are
delivered to the Zone Outputs. In the OFF condition, the
audio from all four Priority Inputs is delivered to the Zone
Outputs identically: prior to the current setting of the Zone
Volume Controls. This means that the priority signal level
will be no louder than the current setting of the Volume
Control in each Zone. When the Override switches are on,
the Priority Input 1 and 2 audio is fed to the Zone Outputs at
the level determined by the setting of the Zone Max Level.
This bypasses the current setting of the Zone Volume
Control and sets the Ducking Level of any Source Input to
70dB, regardless of the Ducking Level switch position.
Priority Inputs
The MPM4 has four Priority Inputs for the insertion of
paging, music, announcement or other audio signals into
the Zone Outputs. The audio from the Priority Inputs is
added to or replaces Source Input audio in any Zone to
which the Priority Input is assigned. The Priority Inputs
assigned within each Zone have a cascading hierarchy
with signal input on P3 muting P4; input on P2 mutes P3
and P4; and input on P1 mutes all three.
The MIC/LINE female XLR Input accepts balanced mic or
line signals with levels up to +24dB. Phantom power is
automatically supplied at +15VDC to power most
commercial condenser microphones. Paging mics with
ON/OFF switches are recommended to prevent the
Priority Input from triggering accidentally.
The stereo RCA Inputs accept unbalanced line audio up to
+24dB. The Left and Right signals are summed together
and the mono signal is distributed to the Zone Outputs.
The DUCKING LEVEL Switch sets the amount of volume
reduction of the Source Input in the Zone Outputs when the
Priority Input is active. In the 0 position, the source signal
and the priority signal are mixed together with no change in
the source signal level. At -20 the source signal is reduced
by 20dB and at -70 the source signal is effectively turned
off leaving only the priority audio signal.
7
XLR/
RCA
PRIORITY
ZONE
VOLUME
OVERRIDE
ON
OFF
PAD
XLR
RCA
PAD XLR/RCA
ON
OFF
PAD
XLR/
RCA
PAD
XLR/
RCA
FOUR ZONE MUSIC & PAGING MANAGER
MODEL MPM4 MADE IN USA
WHIRLWIND - ROCHESTER, NY USA
www.whirlwindusa.com
C US
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