Question about Hifonics Brutus BXi 1206D Car Audio Amplifier

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High Pitch Whine from Amp (not speaker)

I have a newly installed Brutus BXi 1206D and I'm hearing a really high pitched whine coming out of the amp. It is not from the speakers, as I've disconnected the sub to check this. The noise is coming from the amp itself. Any ideas?

Thanks...

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  • Mossman44 Apr 21, 2008

    Thanks.
    I can totally remove the RCA's and the amp still makes the noise. I removed the speaker leads and RCA's, and the internal ringing starts once the amp sees the remote turn on signal.

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  • 52 Answers

Make sure your rca andpower/remote wires are ran on seperate side of your car.it maybe recieving some kind of interference from the alternator. try buying higher shielded wiring too

Posted on Apr 20, 2008

  • john wasson
    john wasson Apr 29, 2008

    hm it sounds like there is a current problem within the amp. i would possibly take it back and get another one or just get another one. or try on of your friends to see if the problem continues

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I have a brutus bxi 1206d 1200 watts, and the amp is coming on fine not protected. But there is no sound output. u can hear a small feedback rumble when connecting the input rca's. But thats it. My...


i would check the speaker cables to see if something came disconnected first maybe wire i touching other terminal shorted out the channels output .

run a new set of rca cable to see if one use are bad . check to see if rca cables pluged into right output of radio . check to see if your remote wire is powering up the amp to turn on the amp ..

will still light up with battery power but will never put output to the speakers with out the remote turn from the radio ... how to check this is to disconnect the cable at the amp and take a short 18 gauge wire and strip both ends and touch the battery terminal at the amp terminal one end the other end where the remote wire is mounted on the amp if do this for a few seconds to see what happens or better yet buy a digital volt meter and check for 12volt a the remote wire when you turn on your radio

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Make sure the red, yellow, and remote cable (usually blue and white stripes) that are coming from the radio are connected to the correct positions in the amp. Make sure amp is also grounded well enough that the ground cable does not come loose. make Sure none of the cables touch each other or the frame of the car (except for ground). Also make sure the cables for the speakers are connected to the amp and subs/speakers properly and not touch any part of the amp or other cables. Check the cables then write again if it happens again.

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If you actuate the subwoofer by hand, do you hear any scraping sounds?

It's possible the voice-coil is rubbing and tripping the amplifiers protection.

Try the amp on a different sub.

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u need at least another amp and set em at 2 ohm and then just take it to a shop aand ask thee guy to equalize it he shouldnt charge u or at least 10 bucks

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The phase is used to match the phase of the sub, highs amps. If you don't know how to determine if there's a phasing problem between the two amps and you can hear no difference, leave it set to 0.

Many people use the subsonic to prevent over driving speakers in a ported enclosure. If you're using a sealed enclosure, leave it set to the lowest frequency. If you have a ported enclosure, set it just below the resonant frequency of the port in your enclosure.

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The shield ground is probably open in the head unit. You can check the shield ground by measuring the resistance from the shield of the RCA connector to the chassis of the head unit. It should be near 0 ohms. Disconnect all RCA cables from the head unit before testing.

If you find that the shield ground is indeed open, the following link has more information for a temporary fix.
Temporary Shield Ground Repair

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