Used item. Operation confirmed. I believe there are no noticeable scratchy noises. Cleaned. There are scratches, but there are no problems with use. There are scratches from use, but there are no problems with use. Recommended for those who understand that this is a used item and those who are familiar with the equipment. ※This is a description found online. I hope it helps. BOSE Model number: 1705 2 ・The entire body case uses aluminum die-casting, which is designed to be used as a heat sink. A simple, compact 2-channel power amplifier that is also popular for professional use. A simple, compact 2-channel power amplifier that is also popular for professional use. It is equipped with slide volume controls that allow independent volume adjustment for left and right channels. It incorporates a dedicated equalizer circuit that best drives the 101 series, and has the same width and height of 60mm as the 101MM. It uses a strong aluminum die-cast body with high heat dissipation.