05 magnum, jl amps cut out

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saleensean

Member - Posts: 5

Joined: June 23, 2006

Location: United States

Posted: June 23, 2006 at 9:39 PM / IP Logged

i have a factory navigation with low line output hooked up to jl 4300 with polk 6.5 components up front and 6x9 polks in the rear, also have jl 1800d with 3 jl 12" w3's. i have the 4300 run from the low line out put and the 1800 run from the 4300. my problem is that at high volumes the amps seem to shut down. i get nothing from the 6.5's and 6x9's and a little bass from the subs for a second or two then it comes back on. this keeps happening on and off unless i turn the volume down. with a cd on it seems to happen sooner, like volume on 15. can anyone help, seems like volume should be able to go higer.

thank you.

aceracer24

Copper - Posts: 140

Joined: May 30, 2006

Location: United States

Posted: June 23, 2006 at 10:34 PM / IP Logged

One of my first cars did that...heh it was a bug come to think of it :) Anyway, I was running a generator at teh time and the electrical could not keep up with my system demands. The amp would cut out on the big bass notes and would stay off for a few seconds (my guess is while the generator charged teh battery back up) then come back on till the very next bass hit....usually only at louder volumes. I was poor then so all I could do was keep teh volume turned down or not play it loud as often.

1968 VW Beetle

Pioneed DEH-780MP, 2 10' Memphis PR104D, Memphis PR500.1, TXC 6.1, MTX Thunder 8502

aznboi3644

Gold - Posts: 2,600

This member consistently provides reliable information

Joined: May 01, 2006

Location: United States

Posted: June 24, 2006 at 1:27 AM / IP Logged

Check for voltage drop

saleensean

Member - Posts: 5

Joined: June 23, 2006

Location: United States

Posted: June 24, 2006 at 7:30 AM / IP Logged

i have a capasitor on the 1800d. should i have one for the 4300 as well.

would it be much better if i get an aftermarket head unit with sub and f/r outputs?

aceracer24

Copper - Posts: 140

Joined: May 30, 2006

Location: United States

Posted: June 24, 2006 at 10:10 AM / IP Logged

I'll save you the trouble and the whipping...forget the cap, read the Big 3 sticky..do that first...then think about upgrading your alt....forget the caps....

1968 VW Beetle

Pioneed DEH-780MP, 2 10' Memphis PR104D, Memphis PR500.1, TXC 6.1, MTX Thunder 8502

aznboi3644

Gold - Posts: 2,600

Joined: May 01, 2006

Location: United States

Posted: June 24, 2006 at 5:48 PM / IP Logged

Agreed with ace...caps are as useful as....well nothing

datspeed77

Member - Posts: 35

Joined: September 14, 2004

Location: United States

Posted: June 24, 2006 at 8:05 PM / IP Logged

You should definitely check your ground to assure that it's properly bolted down. Seems like you have a big voltage drop in the car. I find that most of the time it's due to a bad ground. Other thing you want to check is to make sure your subs are wired up correctly to match your amps requirements. Too low of an impedence might put your amp into protection mode. Good luck.

saleensean

Member - Posts: 5

Joined: June 23, 2006

Location: United States

Posted: June 25, 2006 at 12:32 PM / IP Logged

both the amps are grounded directly to the battery using jl audio battery terminals.

idealrides

Member - Posts: 3

Joined: June 25, 2006

Location: Netherlands Antilles

Posted: June 25, 2006 at 1:50 PM / IP Logged

speaking of the big 3... what are acceptable resistance values between the battery and amp, battery and chassis, etc?

For example if I'm getting less than 1 ohm of loss between the battery ground and my amp do I really need to change the bettery to chassis cable?

aznboi3644

Gold - Posts: 2,600

Joined: May 01, 2006

Location: United States

Posted: June 25, 2006 at 2:12 PM / IP Logged

Yes...bigger the wire the better. But why not anyways? its like less than a foot...I thought the same thing until I upgraded the battery ground wire and voltage only drops no less than 13 and I havent even upgraded the other two yet.

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