B-Stock, Great River 32EQ, Low, Low-Mid, Hi-Mid, and High EQ bands with Gain and Frequency controls, Low and High Band "peaking" switches, EQ in/out switch, Harrison's renowned High- and Low-pass filters with sweepable frequency, Filter in/out switch, An Internal jumper provides selection of the "vintage" feedback design, or a non-feedback option, Format: API Series 500, Mounts in 1 space in a "500" rack, B-Stock with full warranty, may have slight traces of use