It sits atop my Marshal 30 watt amp that is sitting on top of a Spectra bass amp. Pretty kick ass practice setup. No problems with noise. I love the distortions, just have to wish that there were more of them and that I could tweak them a little more. Chorus is weak.
Delays are excellent.
I have actually had some problems with the LED's in my unit. The dials work just fine, but the LED's are just whacked. Either all on at once or all off at once. I have to tell which sound I am using by ear. I use them all the time.