SR-C20A SR-B20A SR-C30A
General Drivers Front L/R: 4.6 cm (1.8") cone × 2, Built-in subwoofer: 7.5 cm (3") cone × 1 Front L/R: 5.5 cm (2-1/8") cone × 2, Tweeter: 2.5 cm (1") dome × 2, Built-in subwoofer: 7.5 cm (3") cone × 2 Center unit: Front L/R: 4.6 cm (1.8“) cone × 2, Subwoofer: 13 cm (5-1/8”) 
Output Power 100 W (Front L/R: 20 W × 2-ch, Built-in subwoofer: 60 W) 120 W (Front L/R: 30 W × 2-ch, Built-in subwoofer: 60 W) 90 W (Front L/R: 20 W × 2-ch, Subwoofer: 50 W)
Power Consumption 13 W (Rated) 25 W (Rated) Center unit: 20 V/2.1 A (Rated), Subwoofer: 20 W
Standby Power Consumption 0.2 W (HDMI control off, Bluetooth standby off), 0.4 W (HDMI control on, Bluetooth standby on) 0.2 W (HDMI control off, Bluetooth standby off), 0.5 W (HDMI control on, Bluetooth standby on) 0.3 W (HDMI control off, Bluetooth standby off), 0.5 W (HDMI control on, Bluetooth standby on)
Dimensions (W x H x D) Installing the unit in front of a TV: 600 × 64 × 94 mm (23-5/8" × 2-1/2" × 3-3/4"), Mounting the unit on a wall with spacers: 600 × 64 × 102 mm (23-5/8" × 2-1/2" × 4") Installing the unit in front of a TV: 910 × 53 × 131 mm (35-7/8" × 2-1/8" × 5-1/8"), Mounting the unit on a wall with spacers: 910 × 131 × 62 mm (35-7/8" × 5-1/8" × 2-1/2") Center unit: 600 x 64 x 94 mm (23-5/8” x 2-1/2” x 3-3/4”), Subwoofer: 335 x 160 x 364 mm (13-1/4” x 6-1/4” x 14-3/8”)
Weight 1.8 kg (3.9 lbs) 3.2 kg (7.1 lbs) Center unit: 1.3 kg (2.9 lbs), Subwoofer: 5.7 kg (12.6 lbs)
Input / Output HDMI 1 out (TV ARC) 1 out (TV ARC) 1 out (TV ARC)
Digital Optical 2 in 2 in 2 in
Subwoofer output No Yes No
Analog Audio 1 in No 1 in
HDMI 4K Pass-through No No No
3D Pass-through No No -
ARC Yes Yes -
CEC Yes Yes Yes
Auto Lip-Sync No No No
eARC/ARC - - ARC
Sound Technology Surround Technology Dolby Audio DTS® Virtual:X™ Dolby Audio
Surround Mode Stereo, Standard, Movie, Game Stereo, Standard, Movie, Game Stereo, Standard, 3D Movie, Game
Compressed Music Enhancer Yes (for Bluetooth) Yes (for Bluetooth) Yes
Bass Extension Yes Yes Yes
Audio Formats Dolby Digital Yes Yes Yes
Dolby Pro Logic II Yes Yes Yes
DTS Digital Surround No Yes No
File Format No No -
Connectivity Wireless Music Streaming No No No
Wi-Fi No No No
MusicCast Surround No No No
AirPlay No No No
Bluetooth Version/Profile Version: Ver 5.0 / Profiles: A2DP / Codecs: SBC, AAC Version: Ver 5.0 / Profiles: A2DP / Codecs: SBC, AAC Version: Ver 5.0 / Profiles: A2DP / Codecs: SBC, AAC
Bluetooth Maximum Communication Range Approx. 10 m ; 33ft (without obstructions) Approx. 10 m ; 33ft (without obstructions) Approx. 10 m; 33 ft (without obstructions)
Wireless Subwoofer No No Yes
Other Features App Control Yes (Sound Bar Remote) Yes (Sound Bar Remote) Yes (Sound Bar Remote)
Learning Function No No No