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  1. #1

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    Default bi-amping MMC6500's

    I have a question about bi-amping my Polk Momo MMC 6500 component set. Right now I am powering them with a 2-channel Pioneer amp pushing 125 watts to each. My question is how much power can they handle if I bi-amp them and what are the benefits or downfalls of bi-amping them?

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    no downfall. benifits are more control. 125 per speaker might be too much even with the gains set to flat.
    2013 Toyota Prius - Planning this one out.

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    Id go with 60-75 watts per channel.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
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    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D

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    Quote Originally Posted by eloplayspolo View Post
    no downfall. benifits are more control. 125 per speaker might be too much even with the gains set to flat.
    Yeah I will get a lower power 4 channel amp if I do bi-amp them. My question was how much rms per channel should I get? I couldn't find ratings anywhere on how much they can handle when bi-amping them.

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    Quote Originally Posted by MacLeod View Post
    Id go with 60-75 watts per channel.
    Now you mean 60-75 watts for each mid and each tweeter correct? So I should get an amp that is 60-75 x 4 channels? If I understand what your saying.

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    Yup.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D

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    Quote Originally Posted by MacLeod View Post
    Yup.
    I did find yesterday here on the Polk website they recommended bi-amping them with the C400.4 amp which is pushing 100 watts times 4 correct? For one they don't make this amp anymore do they and secondly do you think that would be too much power? The last thing I want to do is blow my components. I love them too much and got them for a great deal on Crutchfield.

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    I have a JL 300/4 Great x-over control for bi amping and over all sound quality. I had it bi-amped to my bostons for awhile, and than changed around my system again. If your interested hit me up
    Speakers:
    Definitive BP7001sc mains
    Definitive C/L/R 3000 center
    Polk RT800i's rears
    Definitive supercube I Sub
    Audio:
    Onkyo TX-NR3010
    Adcom GFA 7500
    OPPO BDP-103 CD, SACD, DVD-A
    Video:
    Mitsubishi WD65837 DLP
    OPPO BDP-103 Bluray
    Directv x's 2

  9. #9

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    Quote Originally Posted by ntculenuff View Post
    I have a JL 300/4 Great x-over control for bi amping and over all sound quality. I had it bi-amped to my bostons for awhile, and than changed around my system again. If your interested hit me up
    Might be. How much? Whats the output of the amp?

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    there was a Polk C400.4 Amp for sale a while back, it looks like its still available. its 75 watts x 4 @ 4ohms.
    here is the link:
    http://www.polkaudio.com/forums/show...490#post953490

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    Quote Originally Posted by IrishChamp View Post
    there was a Polk C400.4 Amp for sale a while back, it looks like its still available. its 75 watts x 4 @ 4ohms.
    here is the link:
    http://www.polkaudio.com/forums/show...490#post953490
    Thanks for the link. Thats a bit more than I can spend right at the moment but its still good info. Thanks to everyone who responded.

  12. #12

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    Correct. The 400.4 was 75x4. I still think those were some of the best looking amps ever. Even like the looks of them more than the new ones but like the power of the new ones better. :D
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D

  13. #13

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    heres the specs of the JL 300/4

    INPUT SECTIONS:
    No. of Inputs: Two Stereo Pairs (Front, Rear)
    Input Type: Differential-balanced with RCA jack inputs
    Input Range: Switchable from 200mV - 2V RMS
    to 800mV - 8V RMS

    AMPLIFIER SECTIONS:
    Amplifier Topology: Class AB with patented Absolute
    Symmetry™ dual N-Channel MOSFET output design
    Power Supply: Independent, pulse width modulationregulated
    switching power supply with multistage
    impedance optimizing circuitry.
    Rated Power (Stereo):
    75W RMS x 4 @ 1.5-4Ω (11V - 14.5V)
    Rated Power (Bridged):
    150W RMS x 2 @ 3-8Ω (11V - 14.5V)
    THD at Rated Power: <0.03% @ 4Ω per channel
    (20 Hz-20 kHz)
    Signal to Noise Ratio: >108.5 dB referred to rated power
    (A-weighted, 20 Hz-20 kHz noise bandwidth)
    Frequency Response: 5 Hz - 30 kHz (+0, -1dB)
    Damping Factor: >200 @ 4Ω per ch. / 50 Hz, >100 @ 2Ω
    per ch. / 50 Hz
    Slew Rate: ± 25V/μs

    FILTER SECTIONS:
    Front and Rear Filters (2): State-variable, 12 dB/octave
    Butterworth or 24 dB/octave Linkwitz-Riley low-pass or
    high-pass with continuously variable cutoff frequency from
    50 - 500 Hz, switchable to a range of 500 - 5000 Hz, via
    x10 switch. Defeatable.

    Name:  IMG_0584.JPG
Views: 85
Size:  392.7 KB seen here bridged b4 I pulled it out

    link to the manual
    http://mobile.jlaudio.com/pdfs/Slash_amps/300_4_MAN.pdf
    Last edited by ntculenuff; 11-26-2008 at 12:23 AM. Reason: added pic
    Speakers:
    Definitive BP7001sc mains
    Definitive C/L/R 3000 center
    Polk RT800i's rears
    Definitive supercube I Sub
    Audio:
    Onkyo TX-NR3010
    Adcom GFA 7500
    OPPO BDP-103 CD, SACD, DVD-A
    Video:
    Mitsubishi WD65837 DLP
    OPPO BDP-103 Bluray
    Directv x's 2

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