blew my amp lol need to know why?

Discussion in 'General Electronics Chat' started by mkskate35678, May 13, 2006.

  1. mkskate35678

    Thread Starter New Member

    May 12, 2006
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    ok this is what i did...............connected my 2 12's kicker L7's(750 watts RMS each) and then bridged it into my kenwood 7252 amp(170x2 at 4 ohms)

    i know that it blew because i bridge it but can u explain to me how in a mathamatical way because i am really confused at how the whole Amps, volts, and watt system works
     
  2. thingmaker3

    Retired Moderator

    May 16, 2005
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    By bridging the amp, you made it's load half as much. Since E=I*R, I=E/R. You cut R in half wihtout changing E, so you doubled I. This means you doubled power out, since power = I*I*R = E*E/R. The components which were designed to dissipate only 170 watts were forced to dissipate 340 watts. The extra 170 watts generated 170 joules of heat per second (a watt is one joule per second, after all). The heat caused the temperature of said components to rapidly increase. This is why we say we "fried" the components.
     
  3. mkskate35678

    Thread Starter New Member

    May 12, 2006
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    lol screw it i think ill just still with the mono amps........but now in order to prevent the amp from frying would it be better to have a more powerful amp then the sub? so that i can know at what volume i can keep it on because the subs usually sound distorted after they go over their RMS while a amp i wouldnt know when im going overboard?????
     
  4. mkskate35678

    Thread Starter New Member

    May 12, 2006
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    like lets say i have my 2 subs(750RMS each)

    should i buy two 1000 x 1 RMS amps

    should i buy two 500 x 1 RMS amps

    or should i buy two 750RMS amps JUST LIKE MY SUBS?
     
  5. Papabravo

    Expert

    Feb 24, 2006
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    like do 'em all dude, u surely have more money than knowledge or experience
     
  6. alim

    Senior Member

    Dec 27, 2005
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    Hi depends on what you are using the amp for, 1000 watts may prove to be insufficient for you.
     
  7. mkskate35678

    Thread Starter New Member

    May 12, 2006
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  8. mkskate35678

    Thread Starter New Member

    May 12, 2006
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    well i would like a loud bass but i also want it to sound good in the car like with the speakers and all but im also worried about my windshield if it can handle the bass because when i had that other amp my windshield was going nuts ( would dynamat help)????
     
  9. Papabravo

    Expert

    Feb 24, 2006
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    I'm relaxed. I can write coherent sentences and paragraphs.
     
  10. windoze killa

    AAC Fanatic!

    Feb 23, 2006
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    So this is in a car???? Reminds me of a friend who once put a $12000 system in his $800 car. Nearly blew the doors off. One plus was he ultrasoniclly removed all the rust.

    2 x 750WRMS speakers in a car and you are worried about your windshield. Personally I would be more worried about me eardrums.
     
  11. Gadget

    Distinguished Member

    Jan 10, 2006
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    WHAT..??????
     
  12. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    Everything depends on the sensitivity of the speaker. 50W in speaker with 103db sensitivity equals to the loudness of 800W into a speaker with 91dB sensitivity...
    +3dB = two times the power

    The power is NOT the main factor, but many people (especially connected with car-audio) forget about this simple equation.

    And about blowing the amp... You should not be able to blow the amp, if you use right impedance of the speaker. Most amps are designed in the way that they are capable of delivering the max RMS power for infinite time, provided the load has right impedance.

    But sub-bass amps are a bit different, because with very low frequencies like 10Hz the impedance of the speaker decreases rapidly, so the amp is more loaded.
     
  13. windoze killa

    AAC Fanatic!

    Feb 23, 2006
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    Is a measure of power.
     
  14. Gadget

    Distinguished Member

    Jan 10, 2006
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    I.C.
     
  15. windoze killa

    AAC Fanatic!

    Feb 23, 2006
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    Only through your right eye.
     
  16. thingmaker3

    Retired Moderator

    May 16, 2005
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    Hey Gaget, can you have a "look" at this amp that we're planning on bridging?
     
  17. Gadget

    Distinguished Member

    Jan 10, 2006
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    Eye prefer to "look" at the Waves cycling while Eye Stand on the Bridge (& no, Ey'm not a Square).....

    & BTW, who's Gaget..?? ;)

    (Sorry mkskate, hope ya got your problem sorted now...) ;)
     
  18. thingmaker3

    Retired Moderator

    May 16, 2005
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    Hmm... dere seems to be one of d's missing. Has any body seen one of d's? Dere must be more of d's around somplace...
     
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