Power conditoner..

Your amp doesn't care much what voltage it gets so long as it is in the range.  Get a voltmeter, you may find your generator is putting out 130 volts.

but it is disappointing that you don't see any improvement from the PP.  Are you using heavy power cords (10 awg, at least 12) from the wall to the PP and from the PP to the amp?  

I use  PP10 with excellent results.

Jerry

Gen is putting out 120v right on the $. I'm using a heavy cord from PS Audio.

I am new to this site and obviously its, Forum, however, carlsbad2 is correct.  Anyones amp does not care about the input voltages as long as they are within the stated range.  If you have "brown power" that is also an entirely different matter, and your problems are more serious than simply affecting your amp.  You can rent a voltage recorder and attach it to your incoming mains for a week, or, a month, atypical rental period.  This has to do with your area and your hydro supplier.  Your amp experience may be a "canary in a coal mine" indicator, and, it would be worth investigating.

I am not familiar with the PS Audio model you mention, and in no way discrediting your PS Audio purchase because I believe many of these devices are excellent in filtering the line. 

@fertguy the PP is programmable to put out whatever voltage you want.  Like I said, the voltage doesn't matter.  the quality of the sine wave is what does.  

If you are getting no improvement, the power supply in your amp (and other equipment) must be very good and manages the noise in the wall power.

What amp do you have?

Jerry