Duane Allman’s Dallas Arbiter Fuzz Face
Used during early session work, around late 1968/early 1969 (Muscle Shoals era). Duane allegedly powered it with old 9V carbon-zinc batteries because he argued that they made a special sound.
Also, just to point out – around the Muscle Shoals era Duane mostly seemed to have played a Fender Stratocaster, and used various Fender amps sitting around the FAME / Atlantic Recording Studios. To our knowledge, he never used a Fuzz Face with his Les Paul / Marshall setup, so perhaps he felt that Strat needed a little bit of extra push.