I tried the line out in the back and the headphone jack in the front. Both of these outs send way too much noise to my amp. When I plug in other instruments (other synths and guitars) I have no trouble with the noise. Does anyone else experience this? I think I'm gonna sell my wk 1800 because of it and I really like the thing.

Bob

I tried my wk-1800 through my bass rig and it didn't seem to have much noise. I did, however, keep the volume lower on the keyboard and higher on the amp. Give it a try and see if it helps.

Thanks Malachi. Do you use the headphones jack or the line out from the back?