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poly-planar
Waterproof Marine Audio
IMR-4 Auxiliary Input / Output Interface Module
Introduction:
The IMR-4 is designed to interface to the Audio Expansion Port™ of the Poly-
Planar line of Audio Centers. It provides 2 Auxiliary inputs, a fixed level Pre-
amp line output, and both front and rear variable line level outputs. All inputs
and outputs are stereo (Left + Right). The Auxiliary input channels can be
configured to accept line level, or high level (power amplifier output) signals.
Differential input circuits are used to minimize interference, and to isolate
grounding for connections from bridged mode amplifiers. Refer to the
specification section for details on signal levels and limitations.
Uses
Some of the possibilities enabled with the IMR-4 include:
Connect audio from TV, VCR or DVD
Connect audio from portable MP3, cassette, or CD player
Connect audio from VHF Radio or any other Boat electronics
Provide output for external subwoofer
Provide output for external powered loudspeakers
Provide output for separate audio zone with independent volume
Provide output for headphone connection (requires external
headphone booster)
IMR-4 I/O Interface Module
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1095 Mearns Rd. Warminster PA 18974 TEL (215) 675-7805
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Summary of Contents for poly-planar IMR-4
- Page 1 IMR-4 Auxiliary Input / Output Interface Module Introduction: The IMR-4 is designed to interface to the Audio Expansion Port™ of the Poly- Planar line of Audio Centers. It provides 2 Auxiliary inputs, a fixed level Pre- amp line output, and both front and rear variable line level outputs. All inputs and outputs are stereo (Left + Right).
- Page 2 If the IMR-4 is your only expansion device then it can connect directly to the Audio Center. 4) Connect the IMR-4 in the proper location making sure that the ears on the locking 26 pin connector are latched, and the blue protective tape is removed from any connectors that need to be used.
- Page 3 6) Good quality, shielded cables should be used for all connections to and from the IMR-4 7) It is recommended to use vinyl electrical tape around the RCA jacks for any permanent connections to protect contacts from moisture and to insure that the connection cannot vibrate loose.
- Page 4 Waterproof Marine Audio Configuring the IMR-4 8) The IMR-4 has a bank of 6 DIP Switches. Access the switches by pulling back the clear adhesive tab over the rectangular access hole. Use a small screwdriver or pen tip to slide the switches on or off. Be sure to replace the tab after setting the switches.
- Page 5 Mounting 11) The IMR-4 should be mounted to a flat surface as close to the Audio Center as possible. It should be mounted in an area that is free from dripping water. There are 2 tabs on the plastic case that can be used for screw mounting, or the unit can be fixed using a durable double- stick foam tape.
- Page 6 Remove power by either disconnecting the entire Audio Center 12 pin harness or disconnect the vehicle battery for 10 seconds. IMR-4 I/O Interface Module ———————————————————————————— 1095 Mearns Rd. Warminster PA 18974 TEL (215) 675-7805...
- Page 7 If connecting to a Mono source, you should use a ‘Y’ adapter to send audio to both Left & Right channels of the IMR-4 c. Be sure that audio cable are routed away from vehicle main wire bundles or other cables carrying large currents.
- Page 8 19) Signal is too quiet / too loud from external subwoofer or powered speakers a. Be sure that you have connected the output of the IMR-4 to the LINE level input of your woofer or amplifier. If input switch settings are available then set them to ‘LINE’ or ‘low level input’...
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