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My legacy 12 inch subs are making a crackling sound what can do?

Well i have 2 legacy 12 inch 500watt subs and every time i turn the bass up on my amp the subs start making a crackling sound i was wondering if there is a way to fix this problem?

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Hi rodneybarton

The problem of your unit may be its amplifier. You need to open the box and inside of it, there is a component that attached on the heatsink you need to replace that one. or better send your unit to qualified technician.

Posted on Jan 25, 2014

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sir fixalot
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SOURCE: 12w3v2 Started making distorted bass noise at low volume

Connect each speaker coil one at a time to a square 9 volt battery and watch for the cone to move.

Also try hooking another speaker to your amp just to make sure the noise isn't in the amp.

You can use a 9 volt battery to test wire polarity also. Hook up the + wire of the speaker to the + terminal of the battery and the - speaker to the - battery terminal. If the speaker moved UP or OUT then the wiring is correct. If it moved IN or DOWN then the + and - wires are backwards on the speaker.

Also if you have two or more speakers hooked together test all the same way while they are hooked to each other. ALL of the speakers need to move in the same direction at the same time.

Clipping causes more speaker damage than anything. "Dirty Power" can happen in good quality amps too. The gain control is to match the voltage between the headunit and the amp. It is NOT a volume or boost knob. If you overdrive the first stage of the amp and then clip it damage will occur to the amp and speakers at some point.

Hope this helps.

Posted on Jan 04, 2008

zzedly
  • 300 Answers

SOURCE: bridging to 12 inch kicker competition subs to my 1000 watt alpine 4 channel amp

I'm a bit confused. For Alpine amps, the "M" prefix is for monoblock (aka single channel) amps and the "F" prefix is for multichannel amps. The only M550 I find is an MRD-M550, which is a monoblock, not a 4 channel like you say.
Unfortunately, I can't give you accurate help until we know weather it's truly 1 channel or 4 channel. Then I'll be glad to help!

Posted on Mar 07, 2008

  • 155 Answers

SOURCE: 2 12" subs + 600W amp. Turn on, goes boom once, then red light

Is your gain all the way up? If it done this before, sounds like your over working the amp. Make sure your subs ohm load is capable with the amp load to. If they are 1 ohm and your amp is only 2 ohm stable, it would beat for a lil bit then go into protection mode to. Check your wires too.

Posted on May 13, 2010

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