Stereo 2-band fully parametric sweep, 3 space rack mount design, One of the Best !, Tape monitor in (this version has very quiet OP amps), All internal board connects, Controls well reinforced soldering, Unit is low use, All controls cleaned, Unit calibrated +/-1dB over all functions, levels, channel matching, With manual, (Modifications - Improved power supply capacitors, Improved internal grounding shield at power transformer, noise floor now 4dB better) ,Condition 9+