Problems with amp: speakers cut out when light goes off and...

[Zero-One]

So I've got a 690MP for my HU, TMAT4002 as the amp, and PG Rsd65s for speakers, installed in a 2005 Chevy pickup. Here lately the speakers cut out for varying periods of time. I took it to the install shop, where the installer could not reproduce the problem. He told me to keep an eye on the amp, and if the light turned red or went off completely, to let him know. Of course it's my luck that the install shop went out of business about two days later.

Anyway, I've noticed that the light on the amp goes out entirely when the speakers cut out. When it comes back on so do they. What exactly is the problem, and how do I fix it?

One more problem: there is an inappropriate amount of static and interference coming through the speakers, before, during, and between songs. Once again, I took it to the install shop, and the guy said I probably need an amp with lower interference. I turned down the gain, and the static went out. The only problem is that I have the gain turned down so low, I'm wasting a whole lot of power. Do I need a new amp or what? Thanks in advance.

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[pawn man 10+ year member]

what subs are you running. pr single 4 ohm or dual 4 ohm or what. if you run a pr single 4 ohm subs paralelled & amp bridged that is the problem. when you wire 2 4 ohm subs in paralell you have a 2 ohm load. when you bridge most amps they will see 1/2 the actual load. so the amp sees it as 1 ohm. most ab class 2 channel amps are not 1 ohm stable. if this is not the case than i would get a ddm & check the voltage at the amp while it is playing hard to see what is happening to the voltage. (low voltage can cause this or poor ground)

 

[TurdFergueson2 5,000+ posts]

Check your connections.

 

[bass-aholic 10+ year member]

what subs are you running. pr single 4 ohm or dual 4 ohm or what. if you run a pr single 4 ohm subs paralelled & amp bridged that is the problem. when you wire 2 4 ohm subs in paralell you have a 2 ohm load. when you bridge most amps they will see 1/2 the actual load. so the amp sees it as 1 ohm. most ab class 2 channel amps are not 1 ohm stable. if this is not the case than i would get a ddm & check the voltage at the amp while it is playing hard to see what is happening to the voltage. (low voltage can cause this or poor ground)

where the fvck does i say anything about subs?

Plus the protect light isn't coming on, the amp is just shutting off.....you=fail

 

[bass-aholic 10+ year member]

Check your connections.

x2 bad ground, or possibly remote wire.

 

[pawn man 10+ year member]

where the fvck does i say anything about subs?Plus the protect light isn't coming on, the amp is just shutting off.....you=fail

low imp. will cause some amps to shut off completely.

 

[pilyin 10+ year member]

What else are you running? You might not have enough power for your system. Is your amp is turning off, when is this happening (that's what it sounds like)? Are you noticing the problem when you play your system loud or any other certain circumstance?

As to the static, is it static or clipping?

 

[Zero-One]

Thanks for the replies, everyone.

I'm not running any subs. The factory speakers are still in the rear panels and are hooked up to the head unit; however, they are not hooked up to the amp. So when the front speakers, which are connected to the amp, cut out, the rear ones continue to play.

TurdFergueson2, forgive my ignorance, but I'm not sure how to check the connections. I can visually verify that everything is connected on the amp end...I have no idea about the other stuff.

Pilyin, I'm not sure if the amp is turning off or not. I know that when the speakers cut out, the light that usually stays green is off completely when I look. I notice the problems at any volume level.

The static is really just fuzzy noise in the background, especially when there's no music playing (but it also occurs during and between songs). I wouldn't classify it as clipping. The louder the volume, the more fuzzy noise. By turning the gain down, I can turn the volume up higher without the fuzz. But with the gain turned down, the volume has to be set around level 34 for what I consider normal car listening, whereas with the gain turned up that same loudness would be around volume level 17. Should I just **** it up and leave the gain turned down? (I believe it's almost all the way down now).

 

[grimreper912003 5,000+ posts]

I would say its a ground issue. It sounds to me like your pretty new at this so do you have any friends that are into car audio? Or any local shops you will be willing to pay to have them reground?

 

[pawn man 10+ year member]

get a meter & check the imp. of the speakers that are hooked up to the amp. a bad speaker can cause this or the speaker may be shorted out . low voltage or too high voltage can also cause this. (i have seen the regulator on the alt go bad & the alt charged over 20 volts)

 

[Zero-One]

Grimreper912003, I am very new at this. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Thanks for understanding. Unfortunately, no friends that are into car audio, and now the closest (really the only place for many, many miles) place to get anything installed is Best Buy.

Pawn Man, sounds like a good idea, but I don't know how to do that.

 

[pawn man 10+ year member]

probably need to let someone else w/ a meter look at it.

 

[Zero-One]

Thanks everyone.