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<blockquote data-quote="ravegoo35" data-source="post: 1035601" data-attributes="member: 562303">OK, I have a decent amount of know-how in car audio, but this problem is stumping me.I drive a 2003 Infiniti Sports Coupe, and am trying to install one MTX Thunder 8000 12&quot; sub, powered by a Kenwood KAC-7252 amp.&nbsp; The amp is rated at 570 watts RMS, 1000 peak.The Infiniti comes with a factory Bose HU that has no RCA outs.&nbsp; It does however, send signal to an external Bose amp and that amp then powers the speakers.&nbsp; What I did for signal was quick tap into the rear deck outputs, BEFORE the Bose amp.&nbsp; This way I am not running a strong signal into my amp.&nbsp; I then take the signal and splice it onto the speaker level input harness.&nbsp; So that takes care of my signal.&nbsp; Oh, I am running the sub bridged.To power the amp, I am running 8 gauge power and ground wires, with an inline 40amp fuse on the power line.&nbsp; This was all part of a Scosche kit.&nbsp; I am getting remote turn-on from the same place as my signal, from the Hu outputs, pre-Bose amp.&nbsp; This 8 gauge kit said that it could handle the kind of load that a 4 gauge could, that&#039;s why I bought it.&nbsp; In my last car, I had about 900 watts RMS between two amps running on 8 gauge with no problems at all, so this is why I went 8 gauge.&nbsp; That takes care of power.Now for the problem.&nbsp; So, the amp is receiveing power and turning on and off at appropriate times.&nbsp; That seems OK.&nbsp; When the volume is low, then he sub seems to be responding correctly, no phasing issues.&nbsp; What happens is that any time I turn up the volume, gain, or input level (on the amp) then the amp cuts off.&nbsp; It gets very hot very quickly and then cuts off.&nbsp; I can get the sub to hit at maybe 1/5 of the power that I know is there, but then it just shuts off.Any help is greatly appreciated, Iv&#039;e been trying to overcome this problem for weeks!&nbsp; This is the third brand new amp I&#039;ve tried on this setup, with no changes.&nbsp; I even hooked up my friends sub to my amp and it ran fine, and then hooked up my sub to his amp and that worked fine!&nbsp; There is some problem between my sub and my amp!&nbsp; Once again thanks guys/girls.</blockquote>

[QUOTE="ravegoo35, post: 1035601, member: 562303"] OK, I have a decent amount of know-how in car audio, but this problem is stumping me. I drive a 2003 Infiniti Sports Coupe, and am trying to install one MTX Thunder 8000 12" sub, powered by a Kenwood KAC-7252 amp. The amp is rated at 570 watts RMS, 1000 peak. The Infiniti comes with a factory Bose HU that has no RCA outs. It does however, send signal to an external Bose amp and that amp then powers the speakers. What I did for signal was quick tap into the rear deck outputs, BEFORE the Bose amp. This way I am not running a strong signal into my amp. I then take the signal and splice it onto the speaker level input harness. So that takes care of my signal. Oh, I am running the sub bridged. To power the amp, I am running 8 gauge power and ground wires, with an inline 40amp fuse on the power line. This was all part of a Scosche kit. I am getting remote turn-on from the same place as my signal, from the Hu outputs, pre-Bose amp. This 8 gauge kit said that it could handle the kind of load that a 4 gauge could, that's why I bought it. In my last car, I had about 900 watts RMS between two amps running on 8 gauge with no problems at all, so this is why I went 8 gauge. That takes care of power. Now for the problem. So, the amp is receiveing power and turning on and off at appropriate times. That seems OK. When the volume is low, then he sub seems to be responding correctly, no phasing issues. What happens is that any time I turn up the volume, gain, or input level (on the amp) then the amp cuts off. It gets very hot very quickly and then cuts off. I can get the sub to hit at maybe 1/5 of the power that I know is there, but then it just shuts off. Any help is greatly appreciated, Iv'e been trying to overcome this problem for weeks! This is the third brand new amp I've tried on this setup, with no changes. I even hooked up my friends sub to my amp and it ran fine, and then hooked up my sub to his amp and that worked fine! There is some problem between my sub and my amp! Once again thanks guys/girls. [/QUOTE]

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