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Thread: Problem with bass buzz in back speakers

  1. #1
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    Problem with bass buzz in back speakers

    A couple weeks ago I started noticing a buzzing noise from the 2 back speakers in my 94 Accord whenever something really bassy would be playing on my cd player. The buzzing gets better when I turn down the bass in the eq (obviously) but it's still present and very annoying when the volume is up loud. Anything I can do or are my speakers just dying?

  2. #2
    Maximum Bitrate Woofnstuff's Avatar
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    if it reduces when you turn the volume/bass down sounds like new speaker time,

    The speakers may have been over driven buy not using strong enough amp.

    you should always try and match your amp to speakers,
    eg:
    200W RMS speakers should have a 200W RMS amp
    putting a 50W amp into 200W speakers is bad for them,
    they will work but there will be no real control over the speaker as the amp isnt strong enough.

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    too small of an amp wont damage speakers. if that was true every time you turned the volume down the speakers would need to be replaced. if they are the stock speakers from '94 then replace them. the surrounds have probably fallen apart. until you get new speakers, keep the bass down

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    Maximum Bitrate Woofnstuff's Avatar
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    thats one of the biggest myths out there , actually too small an amp if driven hard WILL destroy speakers.

    bass/low frequencies take more energy to reproduce, a less powerfull amp will push the speaker out but wont have enough electrical control over the speaker to pull the cone back in place properly, so the suspension pulls it back in. this puts the speaker under stress and you get distortion, and distortion leads to the dark side.

    thats the condensed version ...

    its better to slightly overpower a speaker than under power it.

    having said that, i only have a 50w amp on my 200w speakers, but thats a 50w RMS amp and 200w max speakers, they sound fine, but im not expecting them to last forever, and i dont crank the bass, so i pretend that its ok.

    when i wire the heavy duty cable into my car for the carpc ill be putting proper amps in at that point.

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    I understand what you're saying, but once again if you put 200rms to a 200rms speaker the amp only delivers 200 rms at full volume, correct? So by turning the volume down on the deck then less than 200 watts is going to the speaker. If i play my music at 50% volume all the time, then that is only giving the speaker 100 watts. Therefore if underpowering a speaker is harmful then we would all be replacing speakers everytime we turned the volume down.

  6. #6
    Maximum Bitrate Woofnstuff's Avatar
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    yes and no, if you were just using test tone you would be fine, but music is all up and down bits

    You are correct, by the way. "under-powering" a driver won't blow it. But, people "under-powering" a driver often push it too far into the "clipping" zone, causing the damage.

    if you have a matched amp, and its turned half way down, the amp still has the potential ability to control the speakers better if it needs to, the distortion generated by the amp will be lower (more transient headroom)

    unless you ring the snot out of it, speakers dont die that fast. its a slow thing you probably wont notice, then one day you'll hear a rattle or something.

    and for reference
    http://www.polkaudio.com/education/s...uestion_num=70

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    woof is correct
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    Have you tried looking for a "Loose Ground" on ANY of your equip. Ground Loops will cause this "Buzzing" in speakers. It is also very prevailing in connections from most PC's to non-amped/regulated speakers. Car speakers are not regulated, they are just there receiving a amp'd signal. They are not hooked up to noise/supress circuitry, hence the "Buzz" when a ground loop occurs. Could have come from altering a piece of your equip, changing hardware, or accidently loosining a wire/ground somewhere.
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    Quote Originally Posted by japeeler View Post
    Have you tried looking for a "Loose Ground" on ANY of your equip. Ground Loops will cause this "Buzzing" in speakers. It is also very prevailing in connections from most PC's to non-amped/regulated speakers. Car speakers are not regulated, they are just there receiving a amp'd signal. They are not hooked up to noise/supress circuitry, hence the "Buzz" when a ground loop occurs. Could have come from altering a piece of your equip, changing hardware, or accidently loosining a wire/ground somewhere.
    I think this is your problem too. Make sure your ground lead isnt to long, and its actualyl attached to the CHASSIS! If there is a coating over the metal, sand it off and BOLT it on so it doesnt move.

  10. #10
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    To get to the original Q:

    If you turn the bass down and the rattel or buzz goes away, your speakers most likely can't handle the input or, as mentioned, they may be underpowered (the amp, not the speaker) and the amp is "clipping" (kills speakers quicker than you can say "oops").

    They may be ratched, they may just not be "up to the task" from your system. Either way, replacement sounds in order.

    There is the chance that your signal is crap due to a dying amp or other component but need more info on your system for that diagnosis (ie: hu, amps, speakers, install, 'puter, soundcard, etc).

    Good luck.
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