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wiring

Discussion in 'Car Stereo Amplifiers' started by crazywhiteboy91, Aug 15, 2009.

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  1. crazywhiteboy91

    crazywhiteboy91 Full Member

    ok guys i had a profesional car audio guy install my kenwood 350 watt amp. he said the way he wired it it would get max power. i have a dvc 4 ohm jvc 12'' sub. the way he wired it is he ran off of both Positives of the amp the wire hook up is + - - + thats the way it looks. i tried bridging it afterwards and then it would saftey shut off. how did he wire it ?
     
    crazywhiteboy91, Aug 15, 2009
    #1
  2. pedro quiroga

    pedro quiroga Well-Known Member

    is your amp 2 ohm mono stable? is it a mono amp btw?
     
    pedro quiroga, Aug 15, 2009
    #2
  3. crazywhiteboy91

    crazywhiteboy91 Full Member

    its a 2 channel amp. let me find the specs on it and ill post back. heres a small pic.
     

    Attached Files:

    crazywhiteboy91, Aug 15, 2009
    #3
  4. crazywhiteboy91

    crazywhiteboy91 Full Member

    heres the amp. http://www.sonicelectronix.com/item_18385_Kenwood+KAC-5204.html

    2-Channel Class A/B Car Amplifier
    RMS Power Rating:
    4 ohms: 60 watts x 2 chan.
    2 ohms: 75 watts x 2 chan.
    Bridged, 4 ohms: 150 watts x 1 chan.
    Max power output: 175 watts x 2 chan.

    thers the power rating i dont know it it will help. any idea on how much its running the way he wired it?
     
    crazywhiteboy91, Aug 15, 2009
    #4
  5. pedro quiroga

    pedro quiroga Well-Known Member

    he wired it in 4 ohm stereo, you wired it to a 2 ohm mono load which the amp can not handle. put it back the other way before you damage it.

    your other option is to get a dvc 2 ohm sub. that way you can wire it to a 4 ohm mono load and get the most from that amp or get an amp that can handle a 2 ohm mono load.
     
    pedro quiroga, Aug 15, 2009
    #5
  6. crazywhiteboy91

    crazywhiteboy91 Full Member

    i did put it back like he had it. my dvc jvc 12'' 4 ohm.. is there anyway to get it to run a 2ohm load? i beleive its wired paralell inside the box + to + and - to - on the sub terminal then so on.
     
    crazywhiteboy91, Aug 15, 2009
    #6
  7. pedro quiroga

    pedro quiroga Well-Known Member

    no the amp cant handle a 2 ohm mono load.

    so then your problem went away when you changed it back?
     
    pedro quiroga, Aug 16, 2009
    #7
  8. Kvo_8

    Kvo_8 Full Member

    if the guy wired it to 4-ohms bridged, why would you want to wire it to 2ohms??

    2 ohms: 75 watts x 2 chan.
    Bridged, 4 ohms: 150 watts x 1 chan.
     
    Kvo_8, Aug 16, 2009
    #8
  9. crazywhiteboy91

    crazywhiteboy91 Full Member

    yea the problem went away when i put it back like he had it. i though when you dropped to 2ohm is when you got the maximum power. im not a pro though idk.
     
    crazywhiteboy91, Aug 16, 2009
    #9
  10. Kvo_8

    Kvo_8 Full Member

    its cool man, none of us are lol
     
    Kvo_8, Aug 16, 2009
    #10
  11. crazywhiteboy91

    crazywhiteboy91 Full Member

    haha yea. i guess your right. this is around my 3rd system. i can hook em up and everything, bridge an amp, but when you get a little more into detail when you changing ohms. it kinda gets me lost. i mean i just really dont know how to do it.
     
    crazywhiteboy91, Aug 16, 2009
    #11
  12. pedro quiroga

    pedro quiroga Well-Known Member

    its a D4 voice coil. so he cant run 4 ohm mono.
     
    pedro quiroga, Aug 16, 2009
    #12
  13. crazywhiteboy91

    crazywhiteboy91 Full Member

    can you explain to me what all that means? and can you answer me a question? the way its wired, how many watts is it getting?
     
    crazywhiteboy91, Aug 17, 2009
    #13
  14. cccullen

    cccullen Full Member

    this really helped me when i was trying to understand the whole thing. Just play around with the number of subs and the impedance. it will show you how to wire it and what the final load will be.

    Just select the number of subs and the impedance and it will show you the final load.

    http://www.the12volt.com/caraudio/woofer_configurations.asp
     
    cccullen, Aug 17, 2009
    #14
  15. crazywhiteboy91

    crazywhiteboy91 Full Member

    ok. can anyone answer me this question tho? any idea on the power rms im getting outa this amp?
     
    crazywhiteboy91, Aug 17, 2009
    #15
  16. cccullen

    cccullen Full Member

    bridged it gets only 150watts rms
     
    cccullen, Aug 17, 2009
    #16
  17. crazywhiteboy91

    crazywhiteboy91 Full Member

    so the way its wired its getting 150 rms?
     
    crazywhiteboy91, Aug 17, 2009
    #17
  18. pedro quiroga

    pedro quiroga Well-Known Member

    no 120 rms.
     
    pedro quiroga, Aug 17, 2009
    #18
  19. crazywhiteboy91

    crazywhiteboy91 Full Member

    how is it 120 rms?
     
    crazywhiteboy91, Aug 17, 2009
    #19
  20. pedro quiroga

    pedro quiroga Well-Known Member

    you have a dvc 4 ohm sub, meaning both coils are 4 ohm. from what you said the installer wired the sub to both terminals of your 2 ch amp.

    those channels are 60 x2 @ 4 ohms RMS. 75x 2 @ 2 ohms RMS.

    even if you could wire it into a 4 ohm mono load, (which BTW is the same as your 2 ohm stereo load) you wouldnt hear the difference.

    so if you want more power look into an amp that is 2 ohm mono stable. then you can recycle the amp you have now for your mids and highs.
     
    pedro quiroga, Aug 17, 2009
    #20
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