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Speaker pop at shut off

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Old Mar 11, 2006 | 09:08 PM
  #1  
fatty matty's Avatar
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Thumbs down Speaker pop at shut off

I just installed an Xtant x1001 and an AC EQL to my system. I am running one set of RCA's to the EQL, then to the Xtant, which has an internal crossover. From the Xtant I am running another set to my 2-channel amp to run my front speakers.

When I power the stereo off the front speakers make a popping noise and the drivers sort of bump to full excursion in that moment.

Any idea what this might be??

The Xtant amplifier was pushing and pulling on my sub (back and forth slowly to full excursion) without sound until I switched the balanced line jumper to "balanced". That seemed to fix the sub problem but the front speaker movement is bugging me!

Could the amp be faulty?

Thanks for any input.
Old Mar 11, 2006 | 11:12 PM
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my guess is the problem lies in the eq. what turnes it on the deck or you acc wire?
Old Mar 11, 2006 | 11:38 PM
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The remote turn on wire from the deck turns on the EQL. The remote turns on the EQL and the two amps.
Old Mar 12, 2006 | 10:00 AM
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is the EQL older? I remember the older ones doing NASTY things to the signal path...an easy test would be to temporarilty disconnect the EQL and run the RCA's straight to the amp. If the problem persists, you know its not th EQL... if the problem goes away, then bingo

bmoney
Old Mar 13, 2006 | 04:18 PM
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I'll try that out - thanks.
Old Mar 13, 2006 | 06:35 PM
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check

bad RCA sometime it gets kinked look into it
Old Mar 19, 2006 | 03:57 PM
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Turns out is was the amp - not sure why it is happening but it doesn't affect the subwoofer in any way...
Old Mar 24, 2006 | 10:28 PM
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bad ground

you may have a bad ground causing the amp to discharge power at shut off. I have had a similar problem, make sure your ground wire is no longer than 3 feet too and that all your equipment is grounded at the same point.
Old Mar 27, 2006 | 02:20 PM
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i would have to disagree with the three foot ground rule. You want your ground to follow the path with least resistence, witch would always be the battery, i have found vehicles where the trunk or tipical mounting spots for ground wire shows in excess of 60 ohms of resistence, so instead of wasting time moving around your ground wire just go straight to the battery, and if you have to split it use a distrobution block. Just my opinion
Old Mar 27, 2006 | 03:01 PM
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Lightbulb

^ There's a good ol' Mobile Dynamics opinion! lol - burn

The only way I advocate a cable ran back to the battery is if it is also terminated to the chassis/body in the back, along with the amp ground(s). Then you have both the chassis and the cable for ground paths back to the battery.



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