◆ This is the DA-A15 stereo power amplifier main unit, featuring a 2-monaural structure from Diatone. - Brand: DIATONE - Model Name: DA-A15 - Structure: 2-monaural - Type: Stereo Power Amplifier - Body Weight: 17.2KG It was in active use until two years ago, but has been stored unused due to a room rearrangement. I have decided to declutter my equipment, so I'm offering it to someone who appreciates it. I just connected it to my CD player and speakers and confirmed that it powers on and produces sound. However, this was a simple test, so I recommend that you match the sound with your own stereo system when you use it. However, since it hasn't been used for a while, there are scratches and some unremovable marks between the parts. Please refer to the photos for the appearance. Also, as it is a heavy item, I will ship it via Yu-Yu Mercari Delivery size 120. I will cover the shipping costs. Thank you for your consideration.