Had my PB-1 repaired, nice, clean tone. Parametric is odd, but in a good way. Odd, in that, it doesn't exude 250-400 in excess, without tweeking the mid control. It defineatly needs a footswitch, since the clean channel is so differnent. The clean channel with my American Deluxe is very nice. Peavey Max. I searched for this for + year. I have babbled a few times, how much I like the pre section of my Mark 4. Well, this ain't the same. I really like the tube channel, as the tonalitly is very balanced, and the eq is responsive. It's very lively. The solid state channel, at least on this unit, well, it's pretty lame. Dark, low gain, mid scooped, on and on. Sansamp RPM. Edgy, punishing lows, cutting mids, screaming highs, tons of gain. It's hard to get a "bad" sound. So, if you need a pre, I would put less emphsis on the "vintage" search, and go straight to a Sansamp RPM. For now, I will be gigging with the Yamaha. When I have more $, it will be RPM all the way.