Computerized equalizer and analyzer. Includes calibration mic. 10 memory presets, pre/post EQ, pink noise generator, source/tape monitor selection, peak/average RTA modes, auto/fixed RTA display modes, L/R/L+R EQ display modes, auto EQ. Professionally cleaned, serviced, tested. With factory updates on mute relays and RFI suppression by DBX. Excellent #9+ condition, nearly perfect.