AMPEG B-15N Portaflex Bass Amp

1969 Ampeg B-15N Portaflex Bass amp, serial number 084427.

This all-tube “flip-top” bass combo amp was made in Linden, New Jersey, and pairs a 25-watt top with simple volume and tone controls, with four inputs to a double baffle 1×15 cabinet loaded with a single 15-inch JBL D140F speaker.

The Ampeg B-15N flip-top was used by Wyman with the Rolling Stones in 1971 while recording Exile on Main St. at Villa Nellcote in France as well as many other Rolling Stones recordings.

Wyman also used the amp in 1969 when the Rolling Stones were rehearsing for their upcoming tour in the basement of Stephen Stills’ Los Angeles home. The band were photographed during rehearsals by Ethan Russell who published an image of Wyman using the amp on page 34 of his book Let It Bleed, Springboard Press, 2009.

24 1/2 by 22 by 14 inches