I snagged this one on ebay Sunday night and just got it today. Bruce Zinky while running the Fender Amp Custom Shop custom built this one as a one off custom for Brad in 1996. I talked to Bruce Zinky on Monday and he confirms that this one is the ONLY 100 watt Prosonic that was ever built!! All I can say so far is WOW what a TONE MONSTER this amp is !!!