Acoustic Control Corporation was a manufacturer of instrument amplifiers, founded by Steve Marks (with the help of his father) and based in Van Nuys, California.
Robby Krieger of The Doors was the most high-profile early user of the Acoustic 260 head and 261 cabinet—the first models ever produced by ACC.
Other bass amp users included Gary Thain from Uriah Heep, Larry Graham, Jimmie Randall, John Paul Jones, Carl Radle, Kelly Groucutt, Ric Grech, John McVie, Tony Stevens, Peter "Overend" Watts, Danny Sheridan, Rod Ellicott (Cold Blood), Flea, John Deacon, and Kirk Powers, the last two using an Acoustic 371 (combination of the 370 amp & 301 bass cabinet).
The Mahavishnu Orchestra members (bass, keyboards, violin excluding John McLaughlin) used Acoustic amplifiers.
Latter-day employee and designer Steve Rabe went on to establish specialist bass amplifier manufacturer SWR (now owned by Fender Musical Instruments Corporation) in 1984, then Raven Labs in 1998.