blown momo 12's

Systems
Systems Posts: 14,873
edited November 2002 in Car Audio & Electronics
Recently I blew my 2 momo 12's.I bought them new off ebay about 2 years ago so ofcourse i dont have a receipt.What i need to know is if I can still send them i to be repaired or swaped or whatever it is that you do to them.If so could you please give me an address, what type of documentation if any to include with the subs and any aother information that i might need to know.thanks DAN
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  • PoweredByDodge
    PoweredByDodge Posts: 4,185
    edited October 2002
    ya gotta be careful w/ buying offline (ebay etc) as like kim says -- 99% of these guys cannot offer you a 'real ' warranty since they're not authorized dealers.

    If you're looking to replace your momo's cheaply --- last time i checked, ebay had new in box old school (red cap) momo 12's for 150 each... and the new (aluminum cone) momo's were going about 175 each.

    used ones (but nobody likes used subs -- since u're inheriting someone else's problems) were about 75 - 100 each.

    you can also hunt through crutchfield's "open box" section for a returned / scratch and dent pair of momo's -- since crutchfield is a registered dealer for polk you would get a full warranty (and if its scratch dent / open box, and polk wont give u the warranty, cruthfield backs it up with a 'crutchfield warranty' that is of equal length and conditions as the polk one) --from crutchfield u can usually grab a pair of open box momo's for 175 - 190 each ((compared to their 225 list price on the momo 12 (without custom lexan box).

    good luck dude :o)
    The Artist formerly known as PoweredByDodge
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  • whitelightnin'
    whitelightnin' Posts: 1
    edited November 2002
    Kim, My old school red cap Momo 12" does not sound tight. When pushing it a little it thuds sometimes....like the cone is bottoming out or something...I am running a Sony XM-7557. The sub channel is only 220W at 0.04 THD at 4 ohms. I am not sure the installers used polyfill. Also I noticed the seal was not used....I have since lost the seal. Can I purchase a new seal? This would be a start as I could verify polyfill. Thanks! jw

    these were purchased via the net from www.matrixcaraudio.com I received the 12" Sub less than 2 years ago. I certainly hope they are an authorized dealer. Please advise. Thank You, jw


    :confused:
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  • [Deleted User]
    [Deleted User] Posts: 0
    edited November 2002
    The only authorized online dealers are Crutchfield and Circuit City. Anybody else should be considered unauthorized.
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  • PoweredByDodge
    PoweredByDodge Posts: 4,185
    edited November 2002
    if you're referring to the "seal" that is a foamy type gasket around the mounting ring of the sub, then do not stress my friend... you dont need a new seal -- well not an actual one i mean... all that stuff is is some high density foam -- go to your local Valu Home Center / Home Depot / Lowe's hardware store and ask them where the "Door and Window home weather stripping material" is... they'll show you a line of stuff that ranges from cloth to rubber and also foam... you can purchase a 10 foot roll for 3 dollars or less. I suggest the 1/4 or 3/16th inch with kind, and get the one that's more dense (firm and weighty) than the other... Frost King (brand) usually makes a real thin lightweight one that is white (ok, but not as good as next one) and a heavier gray colored one that's more dense (reccomended). I've used that stuff to seal everything from 200 watt Mtx subs -- to 400 watt polk's -- to 1200 watt IDmax's and it's never failed me.

    the stuff will compress as you screw down the subwoofer and seal any and all minute air gaps u might have. works great. :)
    The Artist formerly known as PoweredByDodge
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  • PoweredByDodge
    PoweredByDodge Posts: 4,185
    edited November 2002
    almost forgot ---

    regarding polyfill -- polyfill isn't really anything special... people will tell you it kills resonance, it does this and that and whatever... but it really doesn't (or at least not noticeable) ... all polyfill really is good for is making a small air space seem larger to the subwoofer.

    if you're box is 0.88cubic (for a 12) or 0.66(for a 10), then there is no need for polyfill... even if it is a perfect square... and the poly would definately not affect the thudding and performance of the sub that you are describing.

    what sounds much more probably is underpowering. momo's have never been "sensitive" subwoofers... they need a respectable amount of power -- 300 at LEAST.

    what is very probable is that you tried to turn the volume up / gain up with an amp that is not powerful enough for the subwoofer... compensating for lack of power you juiced it and ended up driving the amp into distortion (which would sound crappy) or you drove it to distortion and damaged the sub, now it sounds crappy all the time... solution would be to put a true 400 watts on it and see how it performs.

    maybe yo'ull get lucky and the sub isn't hurt at all...
    The Artist formerly known as PoweredByDodge
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