Question about Fusion FEW12PK Car Subwoofer

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High Pitch Noise Coming Out Of My Subs?

When i plug in the audio cable to my amp my subs make a high pitch noise. What could be causing this?

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  • musicman1336 Mar 16, 2009

    Is it a "squeel"? Alternator whine (changes when motor is reved?)
    How can i Fix This?
    Thanks Larry T.


  • dnda Apr 03, 2009

    it keeps making a popping noise

  • Larry Tezekjian
    Larry Tezekjian May 11, 2010

    Is it a "squeel"? Alternator whine (changes when motor is reved?) In theory, NO high frequenct should be coming out of subwoofers as they play low frequency, unless your crossoveris set to high. Let me know.



    Larry T

    Winona Lake, IN

    http://www.cybersoundsaudio.com/cybersou...

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  • 77 Answers

Sounds like it could be a warning sound that indicates either a short or a bad connection and is tripping the safety warning. check all speaker terminal connections and connections on the amp to make sure there is nothing loose or touching

Posted on Feb 18, 2009

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Why static coming from subs


several things can cause unwanted noise, poor ground, reversed directional rcas, rcas routed too close to power wires, gain turned too high, defective amplifier or h/u(deck),
if your amp is grounded to the body, the size of the body ground at the battery must be increased larger than the amp ground.
check the outside sheathing on the rcas, look for an arrow. it must point from the h/u.

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Every time my sub hits it makes a buzzing


There may be any of several problems.

If you send high pitch signals to a speaker designed for lows, it can cause waves to propagate outward causing a buzzing. Look up the specs on the speaker and verify that your crossover cuts off well below the high end frequency for this speaker.

Another problem can be due to the mounting which can resonate. This should be mounted on at least plywood that is 1/2 inch or more thick. It needs to be wood as plastic or metal will rattle and buzz.

Another problem can be the wiring near this can rattle and buzz.

Check out these possibilities.

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Hello markwasicki,

You did not specify what type of enclosure the subs are in or if they share the same airspace. But the sound you describe sounds suspiciously like the enclosure is at fault and not the sub itself.

Remove and reverse the subs in the box and test for the noise again. If the noise is still produced on the same side of the box, it's the enclosure. If the noise follows the sub, then you have a problem with that sub.

If the box is making the noise, and it's a ported box, you probably have "port noise". If it's a sealed enclosure, you could have either an air leak or flexing noise. In either case, repair the enclosure or put the subs in a new one. If the sub itself is making the noise, there probably isn't much you can do. Most likely some part of the voice coil assembly is touching where it should not.

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Make sure the gain isn't set too high. That's a very common cause of distortion. You'll never want it set above 3/4 of the way to high. It will be a small dial on your amp marked "gain".

See if your receiver has a built in crossover on the channel your amp is hooked up to and set it so the cut off is at 400hz if possible. Meaning that the receiver will only send frequencies of 450hz or lower to your amp

Look on the amp for a built in crossover to the channel your amp is hooked to and set it to 450hz.

Make sure the cable that connects your amp to your stereo isn't running near any power cables of any kind because electricity running through a power cable can be picked up and then the sound it makes will be amplified, sent to your subs and cause distortion.

Make sure your amplifier isn't grounded to
your battery as this can cause what's called ground loop noise...also distortion.

Ground your amp as far away from the amp itself and your subs as the manufacturer safely recommends.

If none of those help then i'll try again :)

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