Boss Audio Systems MR250.4 User Manual Download Page 1 | Manualshive

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Summary of Contents for MR250.4

Page 1: ...User s Manual 2 CHANNEL BRIDGEABLE MOSFET MARINE POWER AMPLIFIER 4 CHANNEL BRIDGEABLE MOSFET MARINE POWER AMPLIFIER ...

Page 2: ...rs of listening pleasure Thank you for making 9 Marine your choice for marine audio entertainment page CONTENTS 2 Introduction 2 What is included 3 Features 3 About 2 Ohm operation 4 General precautions 4 Protection circuitry 5 Installation precautions 5 Fuses 6 Mounting the amplifier 6 Connecting the amplifier 8 Low level input wiring 9 High level input wiring 10 Power and speaker wiring 2 Channe...

Page 3: ...ng Class A B operation Bridgeable outputs TriMode capable MOSFET PWM Pulse Width Modulated Power Supply 2 Ohm stable stereo operation with output power increase Thermal and speaker short protection Soft turn on cirCUit Remote turn on turn off circuit Variable input gain control Variable low and fixed high pass crossovers Variable bass boost 0 to 18dB Exclusive protective coating on PC board to pro...

Page 4: ...rcuit to engage To reset the amplifier when it is in PROTECT mode turn the power off to the system usually by turning off the head unit or other signal source which feeds the amplifier and then turn it on again If the amplifier has shut down due to thermal overload you should first allow it to cool down before restarting If the shut down was due to either an input overload or a short circuit be su...

Page 5: ...p e amplifiers are being used in your system either Run a separate pair of cables from the battery and a chassis ground pOint to each amplifier Each cable must have its own inline fuse or Run a 0 or 2 cable from the fuse holder at the battery to a distribution block at or near the amplifier s location Then run separate cables from the amplifier to this distribution block and to independent chassis...

Page 6: ...igh level and low level inputs from your receiver to your amplifier at the same timet 2 Channel Amplifier 2 Channel Amplifier MR400 2 1 MR400 2 J 7 Optlonnl remote ulJwoofer level conlrQI sold epamtelvl To Audio Outputs of head unit or signal processor IObO z x I l l R R Optional remote ubwoofcr lellel contro sold separately To Speaker Terminals of head unit 4 Channel Amplifier Optlonal remote ubw...

Page 7: ...lows you to connect this amplifier to a pair of main speakers plus a sUlbwoofer on one pair of output channels The main speakers will operate in STEREO while the subwoofer simultaneously operates In MONO To set up the amplifier to run In this mode put the crossover switch in the FULL position Insert h igh pass filter capacitors and a low pass fliller nditJctor into the wiring as shown below Be sur...

Page 8: ...el Amplifier MR250 4 Tri mode operation allows you to connect this amplifier to a pair of main speakers plus a subwoofer on one pair of output channels The main speakers will operate in STEREO while the subwoofer simultaneously operates in MONO To set up the amplifier to run In this mode put the crossover switches in the FULL position Insert high pass filter capacitors and a low pass filter induct...

Page 9: ...ible Th best sUbjective s gna to noise ratio is achieved In this manner Try 0 s the head unit as high 8S possible I lhout distortion and the amp Inpu level as low as possIble Squealing noise from speakers Check for improperly grounded RCA Interconnects Distorted sound Check that the Input Level Contrails set to match the signal level of the head unit Always try to set the Input Lavel as low as pos...

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