Closed Thread
Results 1 to 14 of 14

Reload Thread: Why is my amp getting hot?

  1. #1
    JoshGuy's Avatar
    JoshGuy is offline Member



    Join Date
    May 2011
    Location
    Lawton, OK
    Posts
    141
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Why is my amp getting hot?

    So i have a somewhat old sherwood 250 x 2 amplifier hooked up to some older JL W3 D4 subs. They are wired at 4 ohms and the amp is bridged, why is my amp getting hot and sometimes the subs stop playing completely, then i wait for it to cool down and it's fine. Got any ideas why? And yes i know both are lower end and no i dont really want anything right now so no offers please=D
    Sherwood A/B 250 x 2:

    250 x 2 @ 4 ohms
    500 x 2 @ 2 ohms
    600 x 1 @ 4 ohms
    JL W3 D4 are 300 rms @ 4 ohms



    Explorer 97'
    HU:CDE102
    Sub amp: aq1500d
    Sub: 2 JL 12w3d4's
    Door amp: RF2002
    Highs: memphis audio




  2. #2
    sacsking916's Avatar
    sacsking916 is offline stayin high an loud



    Join Date
    Apr 2009
    Location
    emerald triangle..home of da trees
    Posts
    6,428
    Post Thanks / Like
    Mentioned
    6 Post(s)

    Re: Why is my amp getting hot?

    Cause it's an a/b and its not as efficient I'm guessing.




    TEAM AUDIO TECHNIX
    TEAM SSC
    TEAM CADENCE
    Sold to: imtjnotu; ace_800; omegabunny crazykenkid Bought from: El_weenie; fasfocus00; retroaudioinc; f1mclarenagr; jason19; tone415; twizted859; noph33rracing; tony30cl; carlosg_313 Traded with: Micah_Jones; MikeOfTulsa
    Quote Originally Posted by audioholic View Post
    Apparently I was called out, or called a goat fucker, or something. I really have no idea. Im just along for the ride at this point.
    Quote Originally Posted by CRXBMPN View Post
    King James has nothing on King Sac!

  3. #3
    Kangaroux's Avatar
    Kangaroux is offline I put on



    Join Date
    Dec 2010
    Location
    Maine
    Posts
    9,563
    Post Thanks / Like
    Mentioned
    82 Post(s)

    Re: Why is my amp getting hot?

    are your gains properly set? all bass boosts off? you might be pushing the amp too hard




  4. #4
    JoshGuy's Avatar
    JoshGuy is offline Member

    Threadstarter


    Join Date
    May 2011
    Location
    Lawton, OK
    Posts
    141
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Why is my amp getting hot?

    I can go check, ill let you know. I just turned it down to lower gains, should this fix it somewhat? And A/b and d class wouldnt really make a difference unless its a monoblock. That would help but im not too sure



    Explorer 97'
    HU:CDE102
    Sub amp: aq1500d
    Sub: 2 JL 12w3d4's
    Door amp: RF2002
    Highs: memphis audio

  5. #5
    Kangaroux's Avatar
    Kangaroux is offline I put on



    Join Date
    Dec 2010
    Location
    Maine
    Posts
    9,563
    Post Thanks / Like
    Mentioned
    82 Post(s)

    Re: Why is my amp getting hot?

    Quote Originally Posted by JoshGuy View Post
    I can go check, ill let you know. I just turned it down to lower gains, should this fix it somewhat? And A/b and d class wouldnt really make a difference unless its a monoblock. That would help but im not too sure
    not really, monoblocks are just meant for power on a single channel, that's their only difference. class D's are more efficient and don't heat up as much but in turn don't have quite the amount of SQ you can get with an A/B amp. i'm just thinking you're pushing that amp into clipping, and since it isn't very efficient to start with, is not creating a nice situation.




  6. #6
    JoshGuy's Avatar
    JoshGuy is offline Member

    Threadstarter


    Join Date
    May 2011
    Location
    Lawton, OK
    Posts
    141
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Why is my amp getting hot?

    im a noob whats clipping?



    Explorer 97'
    HU:CDE102
    Sub amp: aq1500d
    Sub: 2 JL 12w3d4's
    Door amp: RF2002
    Highs: memphis audio

  7. #7
    Kangaroux's Avatar
    Kangaroux is offline I put on



    Join Date
    Dec 2010
    Location
    Maine
    Posts
    9,563
    Post Thanks / Like
    Mentioned
    82 Post(s)

    Re: Why is my amp getting hot?

    Quote Originally Posted by JoshGuy View Post
    im a noob whats clipping?



    The sine wave on the left is an unclipped "healthy" signal. The sine wave on the right is clipped (the wave is cut off at the bottom and top).

    basically, if you use bass boosts or push your amp past it's limits then it will begin to clip. clipping is bad for your subs because when your sub is playing a clipped sine wave, it will be extended out in one direction for a longer period of time and, since it's not moving, will generate heat. this extra heat can cause the glue around the voice coil of the sub to melt. once that happens you get coil rub and the coil only get's worse. at that point your sub is basically a paperweight unless you can get it repaired




  8. #8
    JoshGuy's Avatar
    JoshGuy is offline Member

    Threadstarter


    Join Date
    May 2011
    Location
    Lawton, OK
    Posts
    141
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Why is my amp getting hot?

    That graph helps a whole lot thank you. So what do you think my gains should be set at? Or what would you suggest, i know its not a perfect situation for these subs.



    Explorer 97'
    HU:CDE102
    Sub amp: aq1500d
    Sub: 2 JL 12w3d4's
    Door amp: RF2002
    Highs: memphis audio

  9. #9
    supermaxx123's Avatar
    supermaxx123 is offline CarAudio.com Elite



    Join Date
    Aug 2009
    Location
    I.E.
    Posts
    1,830
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Why is my amp getting hot?

    I had a jl audio e4300 ad it heated all the time, and i was only powering components and a 6 1/2" sub. I never had a problem with it, it just liked being hot. My mb quart 4200, rated 25watts more per channel was power the same things, pushing them harder and never got nearly as hot as the jl. I'd say some amps are just weak.



    Bought from: tc3k101, vitveet, chico305, pieper88, Toxic Tuan, rusty_armadillo, tristanmay
    Traded with: modskwod, jmkanek
    Sold to: smd4life, AQHDC3, fastfocus00

  10. #10
    JoshGuy's Avatar
    JoshGuy is offline Member

    Threadstarter


    Join Date
    May 2011
    Location
    Lawton, OK
    Posts
    141
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Why is my amp getting hot?

    Thats what i figured, i need a new amp:/ dammit



    Explorer 97'
    HU:CDE102
    Sub amp: aq1500d
    Sub: 2 JL 12w3d4's
    Door amp: RF2002
    Highs: memphis audio

  11. #11
    supermaxx123's Avatar
    supermaxx123 is offline CarAudio.com Elite



    Join Date
    Aug 2009
    Location
    I.E.
    Posts
    1,830
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Why is my amp getting hot?

    to be honest, 250x 2 is a lot of power for a 2 channel. that is if it's a true 250rms @ 4ohms. lower impedance draws more current and is less efficient. This might not help(as far as being louder) but try running the amp bridged @ 8ohms.



    Bought from: tc3k101, vitveet, chico305, pieper88, Toxic Tuan, rusty_armadillo, tristanmay
    Traded with: modskwod, jmkanek
    Sold to: smd4life, AQHDC3, fastfocus00

  12. #12
    JoshGuy's Avatar
    JoshGuy is offline Member

    Threadstarter


    Join Date
    May 2011
    Location
    Lawton, OK
    Posts
    141
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Why is my amp getting hot?

    Yeah it runs true, it's when sherwood was a good name i believe. It is a little under rated i think. But yeah running it at 8 ohms is definitely an option. still want to try and keep as much volume as i can though



    Explorer 97'
    HU:CDE102
    Sub amp: aq1500d
    Sub: 2 JL 12w3d4's
    Door amp: RF2002
    Highs: memphis audio

  13. #13
    supermaxx123's Avatar
    supermaxx123 is offline CarAudio.com Elite



    Join Date
    Aug 2009
    Location
    I.E.
    Posts
    1,830
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Why is my amp getting hot?

    doesn't hurt to try and i will guarantee it will run cooler.



    Bought from: tc3k101, vitveet, chico305, pieper88, Toxic Tuan, rusty_armadillo, tristanmay
    Traded with: modskwod, jmkanek
    Sold to: smd4life, AQHDC3, fastfocus00

  14. #14
    JoshGuy's Avatar
    JoshGuy is offline Member

    Threadstarter


    Join Date
    May 2011
    Location
    Lawton, OK
    Posts
    141
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Why is my amp getting hot?

    sweet thanks man



    Explorer 97'
    HU:CDE102
    Sub amp: aq1500d
    Sub: 2 JL 12w3d4's
    Door amp: RF2002
    Highs: memphis audio

Closed Thread

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts

1e2 Forum