Clip lights come on and amps cut out at what seems to me, too quiet a volume. have 2 crown ce2000s. one for subs one for mains. 4000 watts should be able to pump....but i feel i should be able to get more. old fanns???...dirty interior????....have a feeling its heat related. space them out so they r not side by side in the rack/?/?.....extra fan in back/???...or front. can i change the sensitivity?...or is it set to protect the circutry??

Clearly a main power amp failure. Look to the device(s) located on the big heat sink and replace them.

Depending on the configuration of speakers you have it will deliver different amounts of power up to 1950 watts when used to power a single 4 ohm speaker. Typical usage would be powering a pair of 8 ohm speakers, in which case it will deliver 400 watts per channel/ speaker.

for some reason channel one of one of our amps started clipping. i first noticed it with the drum kit but it slowly moved to the vocals as well. i haven't noticed this issue before today. what do i need to adjust to keep it from clipping?

What is happening is that your amp can deliver 1500 Watts at a given impedance. The Sub PROBABLY is a higher impedance. Your amp runs out of voltage due to the speaker impedance, hence it "flat tops" or clips.

You will probably find the sub is 8 ohms and your amp might deliver 1500 Watts on a 2 ohm system (this is "specsmanship" to sell their product... more is better thing...

If your amp was as above, the max voltage output would be the same before clipping but with the resistance 4 times, the current is only one fourth that which would deliver 1500 Watts. So you would only get 1500/4 Watts into the speaker or about 375 Watts.

The surface mount ic= MC33079D , 14 pin quad low noise op amp is likely at fault, IF the amp is NOT showing a fault light. A LM324D surface mount will
also work in a pinch. It's located on the input pcb attached to the input jacks.

The problem is not a fuse. The red light indicates that the unit is in "protect" mode. This means that a problem was detected in the final amplification stage and the unit is prevented from turrning on completely to prevent damaging either the speakers or the amp further. These are not the easiest to repair without prior experience and I would not suggest you attemt the repair. Please seek an authorized Crown repair center for assistance.

Dan

Do you get any Fault indications?

Have you swapped the speakers around to eliminate them as external causes?

When the channel dies is the unit very hot and is the fan turning very fast (it should be if hot)? The fan could be defective, slow or airflow may be restricted.

Turn the amp off and examine the fan guard on the rear to make sure it is clear of dust and debris. Vacuum it out if necessary. With a small thin non-metalic object reach in and test the fan for free movement by trying to rotate it. It should coast.

Is it clipping for real or overheating ? It may just be a fault with the indicator light circuitry itself. Make sure the input levels of the amp are matched with the output levels of whatever device is running into the amp, they will either be +4 dbm or -10 dbu, if you have a choice you want them to be set at +4 dbm. Crowns are professional amplifiers and withstand years of hard touring on the road, it would definitely be worth it to take it to a good repair shop if you can't remedy the problem yourself. 

Hi, probably worth fixing, Crown gear is generally reliable, but this one has failed for some reason. Puffs of smoke are not generally good... If it has blown an output array, expect a costly repair.

regards
Graeme

clipping as indicated by its light? if so then you have overdriven your output. i dont know about Crown their protection but normally such indication you have problem with either your load speakers maybe shorted but still audible or maybe your input stage overdriven also.

redrivera