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Thread: Can a 12" and 8" sub be used together?

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    Default Can a 12" and 8" sub be used together?

    As per the title, I have an 8" underseat blaupunkt sub which has been in the car for some time. I have now added a 12" polk audio sub in the boot.

    The problem is, I just cant get them to sound right with both of them running.

    Any help or advice in setting them up together, or am I just going to have to turn off the 8" sub altogether?

    Thanks

    Dan

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    Regular Member craigbarlow18's Avatar
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    imo yes the 8" is a punchier bass than the deep 12" well thats how i set mine up

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    Regular Member Lump's Avatar
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    not unless you have a channel sinc. one will get to your ears before the other, id just take out the 8 IMO

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    Tbh I would fit a switch and dissable the 8" one and use the 12" one most of the time, then if you need the boot space you still have bass by switching on the 8" one.

    If you send different frequencies to each, sending most to the 8" one, but really deep stuff to the 12" that would also solve the problem but you would need an active crossover to do so (from around £40)

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    ok, so looks like disabling the 8" whilst the 12" is working is the best option.

    Now another question as I know next to nothing about audio, my amp has a crossove freq. dial,where should this be set at for optimum performance/quality?

    Thanks

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    what does the dial say and what does it run ?

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    Quote Originally Posted by Lump View Post
    what does the dial say and what does it run ?

    These are the dials(sorry, not very clear):



    from left there is bass boost, switch for hpf/full/lpf, freq. and input level.

    The filter switch and freq. dial are both grouped under x-over and the freq dial goes from 35hz to 350hz.

    Im not sure what you mean when you say 'what does it run?' sorry?

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    The setting is for your personal preference. Bass is meant to be omnidirectional (youcan't tell which direction its coming from) that is why you can have one sub but have stereo speakers. It is normally aceppted that bass is omnidirectional from around 50-60hz down, but in practice your mid-range units wonLt go down low enough at anything but a queit level, so it is necessary to have the subwoofer producing higher frequencies to give you volume.

    Basically the higher the frequency setting the less stereo imaging, but has the potential to go louder because of reduced bass strain on the mids. The lower you have it the mids have to produce morw making them distort at a lower level.

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