Any Options?

lollypop7
lollypop7 Posts: 10
edited February 2006 in Car Subwoofer Talk
A couple of years ago I purchased a Polk/Momo C300.2 amplifier and (2) 1230 Infiniti Reference Subs. They are single VC and wired in parallel, I think. Now I've heard that this isn't a good setup based on wiring but these subs kick. They are both bridged down to two ohm's. Is this ok or what? haven't had any problems yet. Also they are installed into a bandpass box that I feel isn't constructed properly. What should i do to ensure greatest SOUND QUALITY. Use both channels on my amp, change the sub box, use only one sub, or what? Don't want to hurt anything. Thank you for taking the time to reply! I appreciate it!
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Comments

  • 1996blackmax
    1996blackmax Posts: 2,436
    edited February 2006
    I would not use a bandpass box if SQ was my concern.

    Are the subs 4 ohm subs? Are both of their connections connected to the amp? Are any of their connections wired to each other? Meaning is the Positive (+) of one sub connected to the Negative (-) of the other sub?

    I do not think that amp can handle a 2 ohm bridged load. If they are 8 ohm subs then their is no danger to the amp if they are wired in parallel and bridged. You can have two 4 ohm subs wired in parallel if you are using only one channel of the amp (left or right). So we need a little more info about the subs.
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  • neomagus00
    neomagus00 Posts: 3,899
    edited February 2006
    bandpass does not equal sq, except in extremely rare and carefully-configured instances... sealed is best, followed by ported, followed distantly by the various bandpass configurations...
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • MacLeod
    MacLeod Posts: 14,358
    edited February 2006
    I cant believe you havent fried that amp yet! That thing is not rated for 2 ohms mono. Wire each sub up to one channel of the amp.

    Bandpass boxes suck. They make a lot of noise but so would a cow falling off a building. Doesnt mean its going to sound good. Build you a good sealed box at the proper spec for those subs and wire them properly to that amp and youll notice an immediate improvement in SQ. It may not be as loud but you wont have cow guts all over you either.
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  • neomagus00
    neomagus00 Posts: 3,899
    edited February 2006
    hehe... you ARE getting good with your analogies, mac :D
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • lollypop7
    lollypop7 Posts: 10
    edited February 2006
    Well remarkably both positive terminals of each sub is connected to same terminal on amp and same for the negative. These are both SVC 4-ohm subs. This is real wierd. Filter set at 120hz and gain at about 10:00. Do I risk it and keep it the same or what. How many watts are being used? If I do put each sub onto its own channel will these subs sound loud or what? Also Infinity doesn't give any dimensions on making an enclosure for twin 12's. Each should have 1.25cuft. Seperate them or keep together. This system is installed into a 98' Tacoma extended cab. thanks for the help. appreciate the reply's.
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  • neomagus00
    neomagus00 Posts: 3,899
    edited February 2006
    that amp is not designed to handle that load... putting each sub on its own channel will ease the burden considerably... here is a gains setting walkthrough... 120 is a very high cutoff, try 80-ish, see how it sounds... you can make the box one chamber of 2.50 cubic feet, for both subs, or 2 chambers of 1.25 cubic feet, one for each sub, doesn't matter... the divider will take up space, but provide extra rigidity...
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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