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Amp dropping out

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Old Feb 12, 2006 | 08:09 PM
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Default Amp dropping out

Man I hate this..almost got this thign done and now this.

OK I have a D1 running the fronts and the real leads into a JL Audio 450/4. I then have the sub leads running into a JL Audio 500/1. I have a 4 guage wire running from the battery to the back into a distribution block then running an 8 guage wire to each amp. Both amps are grounded to a seat bolt.

When I turn on the key both amps get their signal to turn on music starts to play but after abotu 20 seconds the 500/1 shuts off. I have tore it appart twice now and checked all the wiring and everything checks out. I can pop out the fuse and put it back in and the amp turns on again but then drops off.

The only thing I can think of is there is now enough juice in the battery to keep both of them running but I would think that both would drop out, not just the 500/1 every time. It is winter in Minnesota so the car does not go anywhere but I had the red top on the charger for 2 weeks prior to this test, but then again I have heard that the red tops SUCK once they lose a charge.

Anybody have a crystal ball handy?
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Old Feb 12, 2006 | 08:29 PM
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how do you have the sub wired? is the impedance too low? It sounds like it may be the amp going into protection mode.
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Old Feb 12, 2006 | 08:38 PM
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i'm at work now (ugh...7th day in a row) if you need some help trying to figure this out you can IM me, my aim handle is: trexmx5
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Old Feb 12, 2006 | 10:10 PM
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Couple of things I can think of

1) ground is not sufficient enough to run the amps
2) impedance is too low (IE your speakers are wired incorrectly somehow and sending too low an ohm load to the amp)

All I can think of off of the top of my head hope you get it worked out.

Fej
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Old Feb 12, 2006 | 10:21 PM
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After a barley pop I went back out.

I must have hit a switch while wrappin gthe wires in the sleeves.

I hit the signal sensing switch.

All is well...Other than the subs I bought SUCK!

The CDT components ROCK though!
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Old Feb 12, 2006 | 10:24 PM
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what's a signal sensing switch?
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Old Feb 12, 2006 | 11:22 PM
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Originally Posted by scott_fx
what's a signal sensing switch?
"It is a switch that sences midrange frequency signal presence. If the signal feeding the amp is not full range the circuit will not operate correctly.

When in the ON position the signal sensing circuit will monitor the audio input and turn on the amp when signal is present. After about 25 seconds the amp will shut off if no signal is present."


Being I was using low level signal from teh H/U there was no midrange available, so thats why the amp was shutting off.
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Old Feb 12, 2006 | 11:37 PM
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ah... cool, i did not know about that.
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Old Feb 14, 2006 | 10:02 AM
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Originally Posted by 14U2ENV
"It is a switch that sences midrange frequency signal presence. If the signal feeding the amp is not full range the circuit will not operate correctly.

When in the ON position the signal sensing circuit will monitor the audio input and turn on the amp when signal is present. After about 25 seconds the amp will shut off if no signal is present."


Being I was using low level signal from teh H/U there was no midrange available, so thats why the amp was shutting off.
interesting.....
What subs do you have that suck?
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