Mint condition, no scratches, full function! Smoke free studio, little used! The set includes a power cord, and original packaging.The Frequency select is already detented as it is and always has been a Grayhill switch. It also interacts in shelf mode. On a similar note, the Massive Passive is a “parallel design” and not the conventional “series design.” This means the bands interact with each other too. It is possible, to set a band to boost 20 dB but if another band is boosting near or at that frequency, very little will happen. On a conventional EQ the two bands “add” and you would be boosting 40 dB into clipping.the Master Gain Trim controls in the Mastering Version are true 11 position 1/2 dB stepped Grayhill switches set up for a range between -2.5 to +2.5 dB of master gain trim. This allows more confidence in left/right matching and calibration.