I have a second hand Peavey IPR 1600 amp and the right channel has just started losing its signal the signal flashes on and off and there is sound from the speaker but only low and no bass I have read this is a fault on this amp and there is a mod for it?

Lawrence Nentwig

• 14 Answers
• Posted on May 29, 2009

SOURCE: Peavey sound board 2 channels not working

check for cold solder joints from the input jacks and the fader. If any look suspicious (dull or grainy) re-solder.

SOURCE: 9v battery wires came loose. peavey 5 string bass

The negative battery terminal will go to a black wire and that will be soldered to one of the volume control cases. That makes the remaining wire easy. The negative terminal pole on the battery is the larger round one.

SOURCE: Peavey 115 Low hum Low volume from input

The preamp section has a problem. It could be anything in the preamp but is OFTEN the input jack itself. They take a lot of abuse.

Also the insert jack contacts that forward the preamp to the power amp if no external FX are used can go bad.

Additional things are circuit board cracks caused by rough handling and also controls that have had the knobs mashed in which can destroy the potentiometers they are connected to.

SOURCE: FENDER HOT ROD DEVILLE 410 POPPING SOUND

I have answered some of this before, however I have reveiwed the schematic and as an electrical engineer I want you to do a couple tests.

First, plug in a set of headphones into the preamp out jack. Note that due to the impedance mismatch what you hear will not be very loud. Now change the state of the clean OD. Did you hear a faint pop?

Next plug a LOW impedance device OR even an instrument cable into the power amp "input" jack. Do this with the power off then warm amp up.
Now, change the state of the clean OD. Did you hear a faint pop?

Now for the analysis. If you did hear one in the first test and NOT in the second, the pop you are hearing is the "NATURE OF THE BEAST".

I can tell you from the design that the pop you hear is from coupling within the clean and OD relays within the unit. There is no cure for this within the unit other than find another brand...

I would recommend that you use an EXTERNAL pedal for the effects you want rather than trying to use the clean OD in this amp. I suspect it was never intended to be shifted during playing as I can guarantee it will pop when you shift while having anything other than dead silence (not even a bit of hum from your guitar). There is also statistical noise in the preamp that the laws of physics will not let us get around that may be enough to create a bit of a pop.

You could also use a volume pedal between the preamp output and the power amp in to throttle the volume to zero before shifting to OD.

In general I think you will find that what you are hearing is the nature of this beast.

SOURCE: Mi fender rot rod deluxe has almost no power, the

CHECK VOLUME CONTROL BUTTON.