John Frusciante’s Fender Blackface Showman (Head)
Possibly used during the studio recording of “Scar Tissue” and “Otherside” [Guitar Player, September 1999], as there are photos showing the amp sitting next to John’s usual setup. It appears however that this amp was used only in the studio since on the following tour a Silverface Dual Showman was used instead. [Red Hot Chili Peppers – Bizarre 1999 Germany]
(talking about ‘Otherside’) That was a ’55 Gretsch White Falcon through the Showman and a Marshall 4×12 cabinet. For the breakdown section, I used a ’61 Gibson SG Custom into a cranked Marshall JCM 800. I think that’s the best kind of distortion – a humbucker into a Marshall, like Eddie Van Halen.
(talking about ‘Scar Tissue’) That was my ’55 Strat with the maple neck – most of the basic tracks were recorded with that guitar. I think I ran it through the Showman because the Marshall wasn’t clean enough. [Guitar Player (UK), September 1999]
From the second quotes, it is safe to guess that the Showman was John main amp on the album for the clean sound.