peavey unity 2000. 16 ch. mixer. early 90's

[blaise]

not sure how noisy these things are.
but when i bring the mains up to about -3. with all channels
empty at about 0 to +3. i'm getting a good amount of white noise
doesn't seem as bad with monitor outs.
could probably figure this one out without a schematic but it would be nice
to have one anyway.

[Enzo]

As with any Peavey product, contact customer service at Peavey and ask for the schematics.


If the board is quiet with all the channel faders down, and then each channel adds a little more white noise - that is no one channel is a lot noisier than the others - then it is probably normal. Especially when considering the volume levels we are setting.

You can probably update the op amps in the input stages. A 5532 has a lot less noise than the 4558s, but it also draws twice the current. So a few 5532 in place of 4558 is OK, but a whole board fill of them might overtax the power supply. if you can find a premium op amp that doesn't draw excess current, go fo it. Newer generic types like 4580 might be quieter than the 4558s. Simple enough to try in one channel and see.

of course once you figure out what you have to go through to get at the innards, you may decide to live with it.

[blaise]

thanks for the opamp suggestions, i'll do some research.
opening it up (yuck).
but i also have a slider to replace,
so i have to go through the ordeal anyway.

[Enzo]

PV should have your slider.

[blaise]

already ordered it.
hopefully they send the right one.
last time i ordered a slider for an old mark III bass amp
they sent wrong one. it had a longer throw to it.
matter of fact i better look for that, it may be what i need now.
started the disassembly process today, all those plastic buttons on the back
were having fun now ! yeeehaw.