Problem I am having trouble keeping my amp on when I turn up my stereo. I am running it in stereo setting on the LPF and I have 2x10" subs at only 250watts each. I want to know how I can diagnose this problem of the amp cutting out when I turn up the music. Thanx.

This has got to be the most useles sight i have ever come across

Get a capacitor then your problem will go away! if your clipping its because your amps power is not high enuf i.e. the ingine is eatin it too much. a capacitor will give it a constant 12v supply and ur problem shud disapear

Put a relay on the remote wire because the remote from your radio does not have enough output for the high current amp

It seems both above answers are good but still lacking, sorry. Nether really explain how to fix the problem.

the First one is the most likely cause. especially if the amp cuts out immediately after it receives power. It doesn't have the chance to over heat.

The most frequent problem that ive seen in my 6 years of working on sound-systems. is that people don't know about the physics behind it. if an amp is made to match at 4ohms, and its "seeing" 2 or 8 or a different impedance. it could cause an internal failure, overheating, or it could short circuit the board due to the improper wiring of the speakers to the amp. If your not sure whats the best way to wire your speakers with your amp. try going to the Rockford Fosgate web site. and search their wiring help for your type of speakers. ie two dual voice-coil.

as for the overheating of an amp. its usually caused by one of two things. user stupidity, ie. 1 or more full hour of non stop high power level playing. or from improper wiring. witch could lead to overheating in just a few minutes. once again. check for the proper wiring of your type of speaker.

i personally tested a lot of different scenario's, and was shocked to find out an 80Wrms amp could over heat in less than 8 minutes(within 3 songs) because of improper wiring.

First of all....if you have a frequency adjustment, keep it around 80 hertz on the low pass filter... this will keep frequencies that your sub can't play out, so that you aren't using unnecessary power. The next thing you have to do is turn the gain all the way down.... leave the gain down and then turn the volume of the stereo up nice and loud. With the volume nice and loud, turn up the gain of the amp until the sub is playing nicely and not cutting out. This is your proper gain adjustment. 
If you still have problems, your subs may be wired improperly... what kind of subs are they? Are they dual voice coil? Do you have each sub connected to a different channel or are they both connected to the same place? These are all factors in what kind of electrical load are being placed on your amplifier.

Check and see how your sub is wired if you have a dual 2 ohm sub and your wired at one ohm your amp might not be able handle 1 ohm in stereo most ams are 2 ohm stereo and 4 ohm mono....check the wiring if it's pos. to pos. ....and neg. to neg try doin pos to negetive that will bring your ohms up to 4 then you'll be good

I had the same problem, and it turned out to be something dumb. I had my ground wire from the amp connected to something i thought to be metal. A bad ground is the main problem for an amp cutting off when you turn up the volume. Use sandpaper or steel wool to brush off any paint and bolt the ground down securely. Use a voltmeter to find a good ground. Then turn it up!

Make sure you have a good ground connection

Your amp may not be getting enough juice. What guage power & ground wire are you using? I recomend at least 4 ga. Try getting a capacitator if it only cuts out when you turn it up, or a high output alternator (sp?) You could also run a seperate batt. and use that for your system. Good luck man.

If you are running your subs bridged your amp will turn off to protect itself when the ohm load varies and drops below the safety level. peace

Check fuse in power wire it may be the fusable link also check output of the remote turn on wire

My brother had the same problem, it was a poor ground to the amp.

It might be your ground wire

Ok, whoever wrote this last responce was talking half gibberish! he did have two points I did agree with tho-It may be overheating, or it may need more power fed to it. on the other hand, it may be that you have the subs hooked up in a way that is making the "ohm" load to low. for example: if you have two dual-voice-coil subs, each voice coil rated for 4 ohms, and you have them all hooked up in a parallel circuit -all positives going to the positive terminal in one line, and all negatives to negative terminal, then you are creating a load of only 1 ohm. this amp handles a minimum of 2 ohms. this means that the subs are not holding back the "engine" so to speak, so it's redlining when you "push the gas too much" and overheating. parallel halves the ohms everytime, and series doubles it, so if you put two 4 ohm coils in a parallel circuit, it would create a load of 2 ohms, respectively, if you hooked up that sub with the other sub (at 2 ohm load also) in a series circuit, you would add (not multiply) those ohms to get a 4 ohm load-in which case the amp stays happy:) keep the ohms between 2 and 16 ohms and it should stay that way-look up series and parallel circuits on google or something if you need a diagram, because I realize that this probably sounded like gibberish too-hehe.

later ya'll-enjoy this beast!

Try takng a look @ the wires are they too small?

It could also be that you might have your ohms wired too low for the amp.

A possible explanation could be heating. the amp reaches its boiling point and cuts off. in this case, a fan may keep it from overheating. another option is a voultage problem, you may have to readjust the bias current. try measuring it if you know how). the amount of bias current depends on your output stage. something like: 20-50 mA for normal bipolar push pull probabely twice as much for darlington push pull and up to 250mA for MOS FET push pull.