Hi, I have own a pair of peavey impulse 1012 speakers. One of them has developed a fault in that the output is terribly owful at low volume compared to the other one but an increase in the output from the amp makes it suddenly improve. Any suggestions?

Open it up. Look for blown or bulging capacitors.

Or

Take to Peavey Service

https://www.google.com/search?q=peavey+cs4000+service

..

simple !! most peavey mixers have a monitor output !! you can use that to feed new amp , and theres your volume too !!! or if your already using the monitor output , you can buy a split cable (1 in 2 outs) for main send !! this cable would have to be kept short or it will induce HUMMM !! and in real extreme cases if your using a low Z send (cant think as to why ) a device known as a (direct box) normally used by instrument sends can be used in reverse to "tap" into a low Z send and output with a unbalanced send for an amp to your other room , but hey why not just add a speaker with a volume control to it for this smaller room ? and forgo the new amp

Can't be fuses, as it comes back on!

Questions:-
i) Does it go off when run continuously with volume controls at zero?
(this checks whether the audio output level is causing a problem).

ii) When the unit does operate, is the sound good on both speakers?

iii) Does the fault occur more when outdoors (wind noise tripping the power protection). If so, reduce the low freq EQ setting.

iii) Do the EQ lights flutter when the fault occurs?

This fault has been reported on the Escort 3000 too, see link
Peavey Escort 3000 sound cutting out - Peavey Forum
suggesting this may need a 'electronic modification' to put it right.

Hope this helps.

When you unload one amplifier you stand the chance of killing the amp's output transistor. If you must use only one speaker, you have to bridge the amps.

This is a VERY low level output designed for headphones and will not drive a cab directly, you'll need an amp, take it to line in of an amp and all should be fine (REMEMBER This is designed to drive stereo headphones so is a TRS Right,Left,Screen. If you plug it into a mono input you will probably be shorting out one side of the peavey's output so get a splitter.

Try connecting them to another amplifier...you can use the speaker output of a guitar amp as a quick test. If the amp (and mixer) check OK, it sounds like you are about to become good friends with your local speaker reconing shop.

Remember...Distorted Audio Can Kill Speakers even at low volumes. It happens because sine waves become square waves. Google it for additional information.

Suspect that the pot is broken, or start cleaning all the back switches, this pv amps suffer from a terrible switch quality.

First of all confirm if the speaker impedance is not lower then the recommended Ohms at the back of the Mixer speaker socket.You can use an 8 Ohms speaker on a 4 Ohms amplifier but not vise versa .
Next see if the fan on the mixer works. If not the Amp is getting very hot and this will lead to unwanted distortion. You can confirm if its a heat related issue by playing the mixer at low volumes for more than an hour and see if it distorts.

Here is a link to the manual:http://www.peavey.com/assets/literature/manuals/00513220_7.pdf I didn't look at the manual for the crossover but this is probably the way I would do it. Look at page 13 in the manual : Come out of the Main out (31 in the diagram) into the main in of your crossover. Go out of your crossover Hi and Mid out setting back into Power amp In 1 (labelled 32 in the diagram). Hook your speakers that you normally use to the output jacks on the back of the Peavey. Make sure you match the output impedances. Go out of your crossover low output into the Pyle power amp and out of the Pyle into your subs. Make sure the impedance ratings of all your speakers match the output impedances of your amps. You will only be running in Mono mode as that is the signal output of the Peavey mixer. You can run faux stereo by using the Main monitor Out as 1/2 the pair and the Main Out as the other 1/2 to both channels of the crossover but you won't be getting a true stereo pan mode.

The output stage has a problem. From your description, I'd guess that the high voltage supply has failed. The low volume and distortion suggests that you are trying to power the speakers from the driver section rather than the outputs. There is a resistor that fails in some of this series. If I remember correctly it is either a 2K or 3K resistor 10 watts in size. If you have no experience with repairs, I'd seek a service shop that is familiar with these units. The part runs between $5-$10.

Dan