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  1. #1

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    Join Date
    Oct 2006

    Question (Long and drawn-out) Crossover question...

    I upgraded from db6750's to MMC6500's about a year ago and the difference amazed me. I thought the db's were great but the momo's were a huge step up.

    Just recently my right component set has been cutting out randomly so I pulled the crossovers out of the dash and noticed that if I held the right crossover in my hands and twisted it the speakers perked right up! Investigating further, I found the specific electrical component on the crossover PC board which must be loose, cuz I could wiggle it to get sound out of the right channel. Also, I noticed that the PC board has "MMC5250" stamped on it!

    This makes me wonder a few things:

    1) Did the wrong crossovers get packaged with my MMC6500's?
    2) If they are the wrong crossovers, have I been overpowering them with 100Wrms from my JL 500/5?
    3) Rather than send them in for exchange/repair, I could just resolder the inductor/capacitor/whatever it is. Has anybody ever removed a crossover PC board from the housing?

    Thanks in advance...

  2. #2

    Member Sales Rating: (0)

    Join Date
    Dec 2006


    I think both the MMC5250 and MMC6500 utilize the same crossover (they both crossover at 2.6kHz 2nd order High & Low Pass). They are both essentially the exact same components, the difference being the size of the driver 5.25" and 6.5", respectively. Both components can handle a decent amount of power... 100 watts for either of them wouldn't be overpowering them.

  3. #3

    Member Sales Rating: (0)

    Join Date
    Dec 2003
    Chattanooga, TN


    Actually the 5250 is cut off at 2.75 KHz while the 6500 is 2.6. Both are at 12 db octave slopes. Thats splitting hairs tho - wont make a difference.

    If you bought them thru an authorized dealer and not Ebay, contact Polk customer service. Id be willing to bet theyd have a new crossover out to you in no time.
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    Last edited by MacLeod; 12-17-2007 at 06:25 PM.
    polkaudio sound quality competitor since 2005
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  4. #4

    Member Sales Rating: (3)

    Join Date
    Sep 2007


    I had a crossover on a set of SR5250's defective out of the box and Polk sent me a new one ASAP. Great customer service.

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