●SONY MDR-Z7. I acquired this used. The previous owner said they had repaired it, which made me a bit uneasy, but it produces high-quality sound and works well. My judgment is based on an elderly person's hearing, so younger people might have a different impression. I have confirmed output from both the left and right sides. More details here → https://www.sony.jp/headphone/products/MDR-Z7/ Or here → https://www.amazon.co.jp/%E3%82%BD%E3%83%8B%E3%83%BC-%E3%82%B9%E3%83%86%E3%83%AC%E3%82%AA%E3%83%98%E3%83%83%E3%83%89%E3%83%9B%E3%83%B3-Reality-Audio%E8%AA%8D%E5%AE%9A%E3%83%A2%E3%83%87%E3%83%AB-MDR-Z7/dp/B00NW357PK ●Regarding the appearance, the main body doesn't have any major scratches or chips, but it does show signs of use. The inner surface of the headband was cracked and in a deteriorated state, so I used a repair agent to restore it, although it's not quite as good as new. The ear pads had some scratches, which I also repaired with a repair agent. Well, as for the appearance, it's based on my personal subjective view, and there might be other scratches that I haven't noticed. Ultimately, please refer to the images to make your judgment.