The RPQ-10, a preamp/parametric equalizer from BOSS's "Micro Rack Series," a half-rack size series released in 1987. This effector has both microphone and instrument inputs, allowing use with different impedances. It's a piece of equipment that offers both the visual and intuitive ease of use of two-band high and low equalization, and the detailed control not found in compact effectors. Only the knob cover for the "Q" slider on the high band is missing, but there are no functional or operational issues. There is some minor soiling on the panel, but it's in good condition with few scratches, likely due to being rack-mounted equipment. It has been tested with an adapter and confirmed to be working, with no crackling or noise. Due to its age, this item is sold as-is, with no returns or exchanges.