Rack-mountable solid-state bass amplifier head, 480 watts at 4 ohms, and with GK’s famous biamp circuit with an additional 50-watt amplifier to drive a horn. Big toroidal transformer, very well-made and reliable for heavy-duty usage. Other features include an active 4-band EQ, presence and contour controls, a master volume, front-mounted direct out and effects loop, and both 1/4” and Speakon outputs. Very clean and all-original, made in San Jose, California, USA.