Question about Performance Teknique ICBM-892 Car Audio Amplifier

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I cant stop the whine

I cant stop the whinning noise i have my amp grounded to the frame but it stii does it my power wires are on the oppisite side of the car from my rca jacks how can i stop this and i tried a ground loop isolator and it didnt help

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  • Sean Rodgers May 14, 2009

    it only happens when the car is running and it does change frequency when i step on the gas

  • Sean Rodgers May 14, 2009

    thanks for your help and for gettin back to me so quickly ill give it a shot and i learned something to i now know what dirty power is thanks

  • Sean Rodgers May 14, 2009

    i will thank you

  • Sean Rodgers May 18, 2009

    ok i brought a farad 1.0 and its till making the noise what can i try next

  • Sean Rodgers May 19, 2009

    thanks again for your quick responce ok ill try it thanks

  • Sphynkter
    Sphynkter May 11, 2010

    Does the noise only happen when the car is running or does it whine when the car is off? For example, the stereo is running on battery in accessory mode? Does the whine change frequency or is it constant?

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Ok, if it only happens when the engine is running and the noise changes with the gas, that's alternator whine. Alternator whine is caused by the ambient noise in the voltage which is produced by the alternator. Alternators don't make DC current, they make AC current. The AC current is then converted to DC current and then sent to the rest of the car. The noise comes from an imperfect conversion from AC to DC. That noise travels down the power cable to the amp and causes noise in your speakers. This is often called "dirty power". Dirty power can be variations in voltage, inconsistent current, or noise within the voltage. One of the simplest ways to clean up noise in a car stereo system is to use capacitors. If you add a capacitor to your system just before the amplifier's power cable, it will help filter out the noise from the alternator. Start with 1/2 Farad or 1 Farad. That should be plenty to clean up the noise. The capacitors will also have a positive effect on your amplifier's thermal and sound performance, but you may not notice it.

Posted on May 14, 2009

  • Sphynkter
    Sphynkter May 14, 2009

    Glad to help. If you found this post useful, please rank my responses. Have a nice day!

  • Sphynkter
    Sphynkter May 18, 2009

    Did the capacitor change anything? Where is the cap installed? and how? There should be a thick power cable coming from the 12V+ system into the positive terminal of the cap, the negative terminal should be well grounded to the chassis. You can even run a second lead from the cap directly into the power input of the amp to be sure that the power passes over the cap before the amp. Also, you need to make sure that all the grounds for the car battery, alternator, amp, and cap are really clean, tight, and using high-gauge cables. You should be using at least 4 gauge cables for ALL power and ground cables. If your alternator uses a thin little cable that's all rusted or corroded, you'll need to replace that, too. Alternator whine is always a case of dirty power - we just need to find it and get rid of it.

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