amplifer bridge

Discussion in 'The Projects Forum' started by jaspalgarde, Feb 12, 2014.

  1. jaspalgarde

    Thread Starter New Member

    Feb 9, 2014
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    what can happen if I bridge 4 mono amplifer together, will my speaker die or ampli...
     
  2. crutschow

    Expert

    Mar 14, 2008
    12,977
    3,220
    You can possibly bridge two amps (if the phase of one is inverted) but how do you plan on bridging four? :confused:
     
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  3. jaspalgarde

    Thread Starter New Member

    Feb 9, 2014
    14
    0
    Hey ur right, but if I do like this
    1. 4 amp Ic in diffent metal box
    2. I will be conneting ve side of output to one amp -ve side. And the -ve side of output to another amp so now from -ve of one amp having sound singal from ve and visi-varsa with another amp. Will It work.

    And if it workd then there are 2 types of output from amp so the amps ve and -ve point can be shorted with another amp without distrotion. Will this work. Or amp will at risk.
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    I know what that will do.

    KAPOW ! :D & Possibly BANG !! too

    Well at least you will smoke if not above :D


    Here is the real deal.
    You can only bridge two.
    Parallel connection is possible but dangerous if not properly matched.

    Bridging to a 4Ω is dangerous as each amp will see 2Ω. If used, each amp must be 2Ω stable. Meaning you can bridge two identical amp to a 4Ω speaker if only each amp can handle a 2Ω load without a problem. And should be stable at it's maximum output level. If not stable one will blow sooner than you can go...hell, Yeah, I did. :p

    That is why a bridge config can and should be run at 8Ω or 16Ω speaker loads. As Amps can be stable at 4 to 8Ω nominally.

    Bridging will quadrangle power output. Meaning you can get 200W from two 50W amp.
     
    Last edited: Feb 15, 2014
  5. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    Even bridging two amps is dangerous because you have the problem of equalizing the DC levels at the outputs or you must use capacitance coupling.
     
  6. crutschow

    Expert

    Mar 14, 2008
    12,977
    3,220
    If the amp is a direct drive output then DC offset is a concern whether it's one amp driving the speaker or two amplifiers driving in it a bridge configuration. Don't see that two amps makes it any worse.
     
  7. Ramussons

    Active Member

    May 3, 2013
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    Come again ! :eek:

    Ramesh
     
  8. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,733
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    What do you wanna know,Mate.

    BANG part or power part :D
     
  9. tubeguy

    Well-Known Member

    Nov 3, 2012
    1,157
    197
    Along with the speaker impedance, another limiting factor in power output when bridging a stereo power amp is the amps own power supply. If you are very lucky :), it will be designed to supply just enough current to run both amp channels simultaneously to full rated RMS power.

    So typically you won't be able to get much more than the total rated wattage of the amp into a single speaker at an impedance of twice the minimum rated single-channel impedance.

    And these days, many amplifier power supplies won't actually supply enough current to drive both channels simultaneous to full power.
     
    Last edited: Feb 22, 2014
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