Suggested retail price: ¥26,400 These are high-end portable headphones from Audio-Technica. As the name "SOLID BASS" suggests, the deep bass is very satisfying. It's not just a large quantity of bass, but also has a solid texture that isn't overbearing. The mid and high frequencies also come through clearly, making for a sound quality that I think will appeal to everyone. Selling to declutter. Operation confirmed.