Amazon.co.jp: SONY MDR-XB500 エクストラバスヘッドホン 並行輸入品 : 家電&カメラ
Sony MDR-XB500 Headphones Review - YouTube
The Sony MDR-XB300, MDR-XB500, and MDR-XB700 Extra Bass Headphones | Stereophile.com
Best Buy: Sony Extra Bass Headphone MDR-XB500
Sony MDR-XB500 headphones, $80 in 2008 at Best Buy. Well over 5,000 hours of music, still going strong. I sleep in these on 14 hour flights and forget I'm wearing them when