XB20 x 3 x 2 /help/speaker/srs-xb20/h_zz/ 3 LIGHT ON OFF A 3 3 3 ON ON SRS-XB20 A B A A B SRS-XB20 SRS-XB20 SRS-XB20 12 00 (500mA) A 04 00 (1.5A) SRS-XB20 4-693-259-12(1) 2017 2 2 3 SRS-XB20 ON SRS-XB20 SRS-XB20 x 3 x 2 /help/speaker/srs-xb20/h_zz...