2024-11-11 TEAC UD-503 DAC Headphone Amp - Black - With original box 649USD ebay 2024-11-05 AIRBOW UD503 Special 中古品 逸品館(ACOUSTIC REVIVE CP4付き)USB-DAC TEAC UD-503一部液晶ムラ有 74000JPY ヤフオク(Yahoo) 2024-10-27