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Thread: Subwoofer / bass delay

  
  1. #1
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    viio's Avatar
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    Subwoofer / bass delay

    I've just installed the following Alpine equipment and I'm having a problem with the subwoofer missing the beats, and sounding a split second after it's supposed to.

    Alpine 9833R head unit (no time correction applied, only some EQ adjustment)
    Alpine MRPM650 mono amp
    Alpine SWR1242D Type R 12" subwoofer
    Power cables are 4awg.

    Any suggestions what this might be? Perhaps Mr Coo can suggest something obvious... I did wonder if the sub having the wrong polarity wired could do this.
    The Lord works in mysterious ways...
    Corsa CDTi - 120bhp / 215 lb-ft

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    DanSport16v's Avatar
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    Did you run the power and RCA signal leads down the same side of the car to the boot?

    Do the lights dim at all when the sub kicks in and have you tried playing about with the settings on the amp?

  3. #3
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    Power and RCA are on seperate sides of the car, and the earth is good.

    The lights dim if the sub is very loud. As for the settings, I've not really played with them because I don't know what effect they'll have. I don't want to make it worse or blow the sub :P

    I've got gain, bass Eq, and Low pass filter, I've turned up the gain slightly but left the others on the defaults.
    The Lord works in mysterious ways...
    Corsa CDTi - 120bhp / 215 lb-ft

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    autoSRI's Avatar
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    low pass should be about 80hz and i wouldnt use the eq do that on your head unit id say its a power supply problem what power is the amp what size cable have you got how did you set your gains? have you done the big three if you have time alignment on your head unit you gould delay the other speakers or speed up the sub

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    The amp is 650 RMS with 4awg cable through the car. The gain is set so that I get more bass at low volume, I tend to listen to my music fairly quiet in the front so I turned it up so I can still feel the sub.

    I may just delay the other speakers on the head unit to see if that helps.
    The Lord works in mysterious ways...
    Corsa CDTi - 120bhp / 215 lb-ft

  6. #6
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    autoSRI's Avatar
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    the gain should be set on a lower setting id could be distotion thats why there is a delay

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