Amazon.co.jp: Bose Bass Module 500 ベースモジュール 25.7 cm x 25.7 cm x 23.8 cm 5 kg | Bose Smart Soundbar 900/700/500/300・Bose TV Speaker・SoundTouch 300と接続可能 : 家電&カメラ
Amazon.co.jp: Bose Bass Module 500 Base Module 10" x 10" x 9.4" 11 lbs | Connect to Bose Smart Soundbar 900/700/500/300, Bose TV Speaker SoundTouch 300 : Electronics
Bose Home Speaker 500 vs Bose Home Speaker 300 vs Bose Soundtouch 20: A detailed review Sept 2020 - YouTube