Polk Monitor 10B - Wired Out of Phase

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SolidSqual
SolidSqual Posts: 5,218
edited September 2010 in Speakers
Hey Guys,

One of the the Monitor 10Bs I picked up today are wired out of phase. I just flipped the speaker wiring on the binding posts to confirm. The sound is much better. Now, I actually have a center to my soundstage. Can I flip the binding posts internally? If I do, do I need to flip anything else?

Regards,

Mike
Post edited by SolidSqual on
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  • DaveHo
    DaveHo Posts: 3,584
    edited September 2010
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    Has the speaker been opened before? Maybe someone removed the drivers & got the polarity reversed when they reinstalled. Here is the schematic for the 10B:

    http://www.polkaudio.com/forums/attachment.php?attachmentid=18776&d=1155784729

    Pop out the passive & you should be able to check the wiring to the MW drivers & the tweeter.

    -Dave
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  • FTGV
    FTGV Posts: 3,650
    edited September 2010
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    Maybe one had a woofer replaced and was reinstalled out of phase?I would inspect both speakers to see thats the case .If so then the connections need to be reversed at the woofer terminals as this will bring it into phase with the tweeter aswell.Just reversing the binding posts will place the woofers in phase ,but the tweeter on one side will then be out of phase.
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  • DaveHo
    DaveHo Posts: 3,584
    edited September 2010
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    Had another thought. The black & red plastic pieces on the binding posts can be removed easily. Are they reversed? Check it against the other speaker. Should be the same.

    -Dave
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  • SolidSqual
    SolidSqual Posts: 5,218
    edited September 2010
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    DaveHo wrote: »
    Had another thought. The black & red plastic pieces on the binding posts can be removed easily. Are they reversed? Check it against the other speaker. Should be the same.

    -Dave

    Hey,

    After taking the speaker apart, it definitely looks like everything is stock and nothing has been removed before. Based on a comparison with the other, I think the binding post lug was merely flipped. Thank God, because this is a much easier fix.

    Thanks for the help,

    Mike
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  • FTGV
    FTGV Posts: 3,650
    edited September 2010
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    Good call Dave.
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  • hittlevm
    hittlevm Posts: 3
    edited September 2010
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    Hey Mike, you still have the 10's ? I am thinking of buying some for myself…. I live in Greenwood, please let me know if you see some nice Monitor 10's for sale…. Thanks,

    Michael
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  • SolidSqual
    SolidSqual Posts: 5,218
    edited September 2010
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    I have two pairs of monitor 10s. I'll sell you mine for $115.
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