ive got an aftermarket head unit hooked up to a 4 channel amp for the speakers a a mono amp for the sub. i have 6.5 components in the doors and 6.5 two ways in the rear

problem:

when i turn up the volume over a certan number (depending on the song, or style) the speakers cut out and all you can hear is the sub. then once the song settles down, the speakers will come back in again. any ideas?!?!

ive got the bass and treble in the head unit set to 0 and the settings on the amps are at what ever they come from the factory.

helps appricated here fellas!

 

Sounds like your 4 channel amp isn't grounded good enough so when it needs to pull enough juice to power the other mid/high speakers to the volume you want it's shuttin the amp down. Check the ground on it. Also verify you are using the right gauge wire for the amp.

 

ill defiently check the ground. and its a amp wire kit. So should be the right size...

 

checked the ground, even took it loose and grounded it some where else. Still does the same thing. Now what?

 

Brian

I have in my truck, 2 10 inch subs, eclipse audio, 2 1000 watt amps for those subs, 6x9 kenwoods on the doors, tweeters, kicker speakers and the long ones for the extended cab, the door speakers and extended cab speakers hooked to a fosgate 400 watt amp, phoenix gold capacitors, monster cable all around, In other words too much sound and farr to loud for my truck, might get rid of one of the 1000 watt amps..

Anyways what i have noticed to, is in my pioneer headdeck if i turn it up to about 15 (goes to 40) the subs cut and all i hear are the speakers. Most of the time i have blown a fuse in the little box that connects the amps to the speakers, other times it has been the bad ground or faulty connections, The way my system is setup 10 is loud enough that you dont hear the engine anymore and 6 is about average listenin for me...

You might also want to check the connection to the battery, sometimes those wires get corroded or a bad connection to them that causes the same things you are xperiencing. If that fails its possibly a bad wire. I know i have had to replace speaker wire a couple of times and it sucks, but its cheaper than new speakers..

Rick

 

checked and rechecked all power wires and grounds. i made sure it wasnt chaffed where i fed it through the firewall. any thing else?

 

When I crank my home stereo way up with an older set of speakers a breaker trips in the amp and doesn't reset until I turn the volume back down.
Maybe something similar is happening to you. I can actually hear my breakers trip, figure they do it to protect the speakers.

 

Just a guess with out being able to see it in person.....but try turning the gain down on the amp that's cutting out. What kind of amp is it?

 

its an alpine amp

 

With out knowing more about the amp, my guess is it has some kind of protection circuitry that opens the output when it starts to clip. Clipping occurs when the amp is going full smoke and the peaks begin to get cut off. When this happens, there is a steady current (DC) going into the voice coil of the speakers. The coil rapidly heats up and burns out. If this is the case, it's doing you a favor by protecting you loudspeakers. Sounds like more signal than the amp can handle.

 

soooooooo how do i fix it?

 

If it's not ground then the next thing to check is signal. Check for polarity on the speakers to make sure that positive is positive and negative is negative connected to the amp. Also verify how many ohms your speakers are and what your amp is seeing. If everything looks good, disconnect fronts or rears and crank up your system with just one set of speakers hooked up. If it is fine then plug the other set in and disconnect the set you just had working. If it's still fine then together they are overloading the amp somehow. If the fronts or rears fail then go side to side to figure out which one is the culprit. It's a little time consuming but it will definitely point out where the problem lies if its in the signal from the amp to the speakers. If nothing works and you have problems with fronts and rears like this then I believe the signal problem would be from the amp to the head unit or back to the ground. Where did you ground it? Is it on a painted surface? My rockford power amps kick off if the ground is not good. I have to grind all the paint away from where I'm grounding them, hold them good and tight and then I paint over it so there is a large surface connection for the ground.

 

Turn the gain down

 

Check your speaker wire continuity to ground and the ohm load of each speaker.

 

I think ratsun is correct the gain might be at max like everyone does (I don't know why cause it sounds better at 1/2 or less). Blackdiesel I saw you checked the wires and through the firewall also make sure no wires are pinched by metal or plasic panals cause that will cause them to cut out at higher levels.