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  1. 06-03-2008 12:50 PM #1
    gwh
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    Default Marantz MA500 mono blocks Bridging????

    How do you bridge two of these mono blocks?
    I've googled it and came up empty.


    Thanks for furthering my audio education!




    G
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  2. 06-03-2008 01:13 PM #2
    Hawkeye
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    I might be wrong, but what is there to bridge? They are monoblocks and don't have a second channel unless your planning to use 4?
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  3. 06-03-2008 01:23 PM #3
    Face
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    your best bet is to contact Marantz.
    Last edited by Face; 06-03-2008 at 10:30 PM.
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  4. 06-03-2008 01:26 PM #4
    unc2701
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    If you really mean bridge as in double the wattage here's what you do:

    1)preamp to input amp #1
    2)Inverted output amp #1 to input amp #2
    3)Strap the negatives together.
    4)Hook the speaker to the positives.
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  5. 06-03-2008 02:02 PM #5
    gwh
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    If you really mean bridge as in double the wattage here's what you do:

    1)preamp to input amp #1
    2)Inverted output amp #1 to input amp #2
    3)Strap the negatives together.
    4)Hook the speaker to the positives.
    Yes this is it!
    It's all clear to me now.


    Thanks,


    G
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  6. 06-03-2008 02:14 PM #6
    unc2701
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    No problem!

    FYI, you can bridge just about any common ground amp or identical monoblocks (where the negative is at zero potential) using the above method - assuming you can get an inverted signal somehow.
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  7. 06-03-2008 06:31 PM #7
    danger boy
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    i think you can invert the signal on the Marantz MA500 and MA700 mono blocks.. and with the MA500's if I recall.. it should pump out about 360 watts once bridged ;)
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  8. 06-03-2008 07:16 PM #8
    Hawkeye
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    Yep, I was wrong. At least I learned something today!
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  9. 06-03-2008 09:07 PM #9
    pearsall001
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    Just buy a pair of McIntosh MC501's & be done with it!!! :D Right Gordon!!!
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  10. 06-04-2008 11:34 AM #10
    DarqueKnight
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    Quote Originally Posted by Face View Post
    your best bet is to contact Marantz.
    This is excellent advice. Bridged amps usually only see 1/2 of a speaker's impedance. If you are using 8 ohm speakers the amp will see them as 4 ohms in bridged mode.

    If the MA500 is specified for use with 4 ohm speakers, it may require a minimum of 8 ohms in bridged mode. If the impedance dips too low in bridged mode, you could damage the amp.

    Your power output may or may not double depending to whatever current limiting arrangement the amp uses.

    You should check with Marantz to see if the MA500 can be configured in bridged mode. Some amps cannot be configured that way. If they can be used in bridged mode, Marantz can tell you how the performance (power output and impedance requirements) will change in bridged mode.
    Last edited by DarqueKnight; 06-04-2008 at 11:37 AM.
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  11. 06-04-2008 11:48 AM #11
    unc2701
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    The MA500's were specifically designed to be bridged (thus the inverted output).

    I can't seem to find the manual, but see:
    http://www.marantz.com/pdfs/u_amp_ma500_bck.pdf
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  12. 06-04-2008 05:39 PM #12
    gwh
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    So bridging two at one 4ohm speaker would produce a 2ohm load...correct?
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