old stereo recover as subwoofer amp

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  • henrysin44
    Senior Member
    • Apr 2013
    • 109
    • United States

    #1

    old stereo recover as subwoofer amp

    I have a pioneer Sx-3400 and 2 10" sub's. I put the subwoofer out on my yahmah to right aux on the pioneer and hooked up the 2 sub's to right out on the pioneer. It worked fine for 10 minutes on vol level 8 of 10 then a fuse popped on the pioneer. Can I fix this problem (fixing the amp is not the problem) or do I have to fork over $180 for a subwoofer amp.
    I have salvaged and fixed 18 TVs (1 DLP), 22 LCD monitors, 8 stereos, network stuff, and more laptops and computers than i can count.

    Service Menu/Factory Reset Codes for TVs
    http://www.badcaps.net/forum/showthread.php?t=24809
  • momaka
    master hoarder
    • May 2008
    • 12164
    • Bulgaria

    #2
    Re: old stereo recover as subwoofer amp

    Check impedance of the speakers and also check the amp's manual to see what is the minimum that it will accept.
    Some older amps are strictly rated for 6 or 8 Ohms per channel minimum. According to HiFiEngine, this amp is rated for 15W into 8 Ohms. If your 10" subs are rated for 4 Ohms impedance each and you had them hooked in parallel, the total impedance was 2 Ohms. Most older are not rated for an impedance that low. If you had them hooked in series, you might have not had a problem. But who knows. You may have just been pushing the amp too far, as well. Did you hear any clipping from the 10" subs while you were running this setup?
    Last edited by momaka; 12-28-2013, 10:10 PM.

    Comment

    • henrysin44
      Senior Member
      • Apr 2013
      • 109
      • United States

      #3
      Re: old stereo recover as subwoofer amp

      Originally posted by momaka
      Check impedance of the speakers and also check the amp's manual to see what is the minimum that it will accept.
      Some older amps are strictly rated for 6 or 8 Ohms per channel minimum. According to HiFiEngine, this amp is rated for 15W into 8 Ohms. If your 10" subs are rated for 4 Ohms impedance each and you had them hooked in parallel, the total impedance was 2 Ohms. Most older are not rated for an impedance that low. If you had them hooked in series, you might have not had a problem. But who knows. You may have just been pushing the amp too far, as well. Did you hear any clipping from the 10" subs while you were running this setup?
      no clipping, ill try 1 speaker per channel. If it doesnt work ill try and find another amp from my local recycle center.
      I have salvaged and fixed 18 TVs (1 DLP), 22 LCD monitors, 8 stereos, network stuff, and more laptops and computers than i can count.

      Service Menu/Factory Reset Codes for TVs
      http://www.badcaps.net/forum/showthread.php?t=24809

      Comment

      • momaka
        master hoarder
        • May 2008
        • 12164
        • Bulgaria

        #4
        Re: old stereo recover as subwoofer amp

        Again, you have to check the impedance rating of your subwoofers. Otherwise you'll simply keep blowing amplifiers (and possibly your subwoofers too) if they made to drive those subwoofers. Most speakers have a label on them that states their impedance. Gotta make sure the woofer impedance is the same or higher than the minimum supported by the amplifier. If the subwoofers are 4 Ohms each, go with a car amplifier. Even a cheap one will do okay. You don't really have to spend $180 on a subwoofer amp.
        Last edited by momaka; 12-29-2013, 04:48 PM.

        Comment

        • henrysin44
          Senior Member
          • Apr 2013
          • 109
          • United States

          #5
          Re: old stereo recover as subwoofer amp

          8 ohms, should i try putting them in series?
          I have salvaged and fixed 18 TVs (1 DLP), 22 LCD monitors, 8 stereos, network stuff, and more laptops and computers than i can count.

          Service Menu/Factory Reset Codes for TVs
          http://www.badcaps.net/forum/showthread.php?t=24809

          Comment

          • Th3_uN1Qu3
            Believe in
            • Jul 2010
            • 6031
            • Romania

            #6
            Re: old stereo recover as subwoofer amp

            One per channel will work if they're 8 ohms. But that amp is pretty weak for subwoofers. Putting them in series will definitely work, but they'll be even quieter that way, so it's pretty pointless.
            Originally posted by PeteS in CA
            Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
            A working TV? How boring!

            Comment

            • henrysin44
              Senior Member
              • Apr 2013
              • 109
              • United States

              #7
              Re: old stereo recover as subwoofer amp

              Originally posted by Th3_uN1Qu3
              One per channel will work if they're 8 ohms. But that amp is pretty weak for subwoofers. Putting them in series will definitely work, but they'll be even quieter that way, so it's pretty pointless.
              I can't believe I never thout about one per channel.
              I have salvaged and fixed 18 TVs (1 DLP), 22 LCD monitors, 8 stereos, network stuff, and more laptops and computers than i can count.

              Service Menu/Factory Reset Codes for TVs
              http://www.badcaps.net/forum/showthread.php?t=24809

              Comment

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