Onkyo pre-main amplifier. PHONO, TUNER, and AUX inputs have been confirmed to work. Please understand that the period of use and purchase date are "unknown." This item has been in storage and shows signs of wear, such as scratches and dirt. It will be wrapped in bubble wrap and shipped in a reused cardboard box. Sold as is. No returns, refunds, or exchanges will be accepted. Please understand that no claims or returns are accepted after purchase. AI Summary This is an Onkyo Integra A-5000 pre-main amplifier. Onkyo is a Japanese audio brand established in 1946. The A-5000 is a stereo amplifier from Onkyo's Integra series, which they used to manufacture. In 2022, Onkyo Home Entertainment began bankruptcy proceedings, and the brand is now operating under a new structure. This amplifier provides basic audio functions such as volume control and channel selection.