Question about Nitro BMW-481 Car Audio Amplifier

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1200w Nitro amp

When I plug in my red and white connectors in the amp, the subs start to pulse and the connectors are sensitive whenever I touch them. One guy said that the shield ground could be broken

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Yes it could be your ground..check your negative from the amp is going to the car body and not the battery. also try a new set of rca leads from the stereo to the amp..also check that your stereo audio out voltage is the correct voltage for the amp inputs.

Posted on Jul 27, 2008

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Hello, here is Clarions wire codes.
FRONT Right SPKR: +Gray -Gray/Blk,
FRONT Left SPKR: +White -White/Blk,
REAR Right SPKR: +Purple -Purple/Blk,
REAR Left SPKR: +Green -Green/Blk

Brown Wire = Phone Mute Lead (If applicable)
Yellow Wire = 12V battery lead in (Connect directly to battery)
Red Wire = 12V Ignition wire (Connect to Acc switch)
Blue/White Wire = Amp turn on lead
Black Wire = Chassis Ground
Orange/White Wire = Illumination Lead (Connect to dimmer switch)
Blue Wire = Auto Antenna Lead (lowers power antenna Do not use for Amp Turn on! Use the Blue/White Wire for Amp,EQ, Ect.. turn on wire only

RCA Connectors if applicable:

Black RCA Harness:
White RCA = Rear Audio Left Sub Output 1
Red RCA = Rear Audio Right Sub Output 2

Gray RCA Harness:
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Red RCA = Front Right Audio Out to amp

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Hi and welcome to FixYa,

Initially if electrical, disconnect the black/white wire from the engine stop switch, try and observe if problem persists:
  • if yes, then a loose / dirty / faulty engine stop switch;
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  1. 2 connectors to CDI;
  2. connector from pulse generator (black/yellow - blue/white & green/white wires);
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It sounds like the shield ground in the amplifier is broken. If that's the case, the connections would have to be repaired.

Let me know if you have any other questions.

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