The Low Frequency Expander allows the player to perfectly tune the bottom end response to suit playing style. A top mounted ¼-inch Auxiliary Input allows source material to be blended with bass making the SB12 a perfect rehearsal amp. Convenient ¼-inch headphone out is provided for private practice.

A solid plywood cabinet construction ensures unmatched reliability under even the most extreme playing schedule. The solid all-metal grille protects the high quality speaker components while an all-metal box chassis protects the electronic circuitry.