I purchased this on Mercari, but I no longer need it, so I'm selling it. There's a slight unevenness on the left side of the body. Please check the images. I've confirmed that it produces sound, but I haven't checked all the functions, so please understand that this is being sold as a junk item before purchasing. The following is the previous owner's description: Type...PA system Stereo microphone preamplifier ART TPS II Electro Harmonix 12ax7 vacuum tube installed. After installing the Electro Harmonix 12ax7 vacuum tube, it produces a wonderful, warm analog sound. Operation is not a problem, but the outer body is old. This is a great preamplifier. If you prioritize quality over the beauty of the form, please consider it. Original box included.