Thank you for viewing. This is the audio-technica phono equalizer, the AT-PEQ3. I was using it until last week, but I am selling it because I switched to a player with a built-in phono equalizer. There are no noticeable stains or scratches, but please understand that it has been used for several years. Thank you for your consideration. audio-technica records record player turntable phono equalizer phono eq