Simple to use, this amp has only full EQ, master volume, and gain controls. 200 Watts output from (4) 6550 tubes means it has enough gain and volume on tap to shake the floor of the largest arenas.
For the purest sounds throughout the bass spectrum, you can't beat the AD200B. Single channel, all valve, inputs for active or passive basses, Dual Output (Passive Archive) "Slave Out" Failure Fuse.