High-Quality Sound Modified Item: audio-technica AT-PEQ3 phono equalizer. The op-amp JRC 5532D has been replaced with MUSES8820D. The high frequencies have been extended. Includes the main unit and the power AC adapter (genuine). The box is not included. The instruction manual can be viewed at: https://www.audio-technica.co.jp/support/manual/AT-PEQ3 Operation has been confirmed. The exterior has some scratches, but it is in good condition. Used only indoors, in a smoke-free environment. Please understand that this is a used item before purchasing. Thank you.