PolyPlanar IMR-2 - Manual (Page 4)

MRR-7 Keypad - IMR-2 Interface 7
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Maryland USA (410) 761-4000 - www.polyplanar.com
poly-planar
Waterproof Marine Audio
(figure 6) example system configuration with cabin mounted Audio Center, 8
speakers, 2 remote controls, 2-way intercom, independent Zone Amplifier.
Configuring the MRR-7
9) The MRR-7 has a Volume Mode Switch [17] and a rotary Mic Volume
control [16] on the rear panel (refer to figure 1). Before the MRR-7 is
permanently mounted, please follow the steps below:
IN M
S V T
DI B M A
P
Helm Zone
Cabin Zone
IMR
2
Rear
channel
speakers
Front
channel
speakers
Audio Center
MRR-7
MRR-7
IN M
S V T
DI B M A
P
IMR
4
MZ-100
Zone
Amplifier
MRR-7 Keypad - IMR-2 Interface 8
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Maryland USA (410) 761-4000 - www.polyplanar.com
poly-planar
Waterproof Marine Audio
a. The Volume Mode Switch [17] enables the Volume control
buttons [3] & [4] and Mute [10] to control the volume of a
separate audio zone. If you have a separate Poly-Planar
Zone Amplifier connected such as in Figure 6 above, then the
Volume Mode switch should be set to the ‘Zone Amp’ setting
(slide toward the left looking at the rear side.) With the switch
in this setting the Audio Center will ignore volume control
buttons. Instead the volume control information will be sent
directly to the Zone Amplifier. Otherwise, leave the switch set
to the ‘Radio’ setting (slide switch toward right) to control the
Audio Center.
b. The Mic Volume Control [16] adjusts the sensitivity of the
intercom microphone. Before permanently mounting the
MRR-7 to the dash you should test the intercom function to
insure that the level is adequate. If the sensitivity is too high
then there may be a chance of feedback or howling. If the
sensitivity is too low then the signal may not be loud enough to
overcome engine and cabin noise. For best results follow the
steps below:
i. Make all connections as described in previous section
ii. Verify that the system is functioning as desired. Test
volume buttons and intercom.
iii. When pressing the intercom, the microphone should
transmit into the opposite zone of the one that you are
in. If you hear yourself or experience loud howling in
the speaker near to you then it is likely that the
connections to the IMR-2 are reversed. Swap the
MRR cable to the opposite IMR-2 connector and try
again.
iv. Start the engine of your boat and select an RPM that
creates typical noise level during cruising.
v. Adjust the Mic Volume Control on all Intercom
microphones in your system to achieve a comfortable
level without any feedback. You should push the
MRR-7 into the mounting hole while testing the Mic
level in order to best simulate the actual operating
condition.