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Impartial price comparison
Sony SRS-XB21 vs. Amazon Echo Dot (3rd Generation) + 9
Capacity (max/total)
20 W
20 W
4 W
20 W
2 W
Frequency range (max)
20000 Hz
20000 Hz
20000 Hz
Frequency range (min)
20 Hz
100 Hz
65 Hz
Sensitivity
80 dB
Bluetooth
Yes
Yes
Yes
Yes
No
Yes
No
Yes
Yes
Yes
Yes
Bluetooth codec
LDAC, SBC, AAC
SBC
SBC
Bluetooth version
4.2
5.0
4.2
4.2
5.0
Wireless network (Wi-Fi)
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Radio receiver
No
No
No
No
Yes
No
No
No
Type (radio)
Streaming standards
Spotify Connect, Deezer, TuneIn, Amazon Music
Spotify Connect, Amazon Music
Google Cast/Chromecast, TuneIn
AirPlay, Spotify Connect, Tidal, Deezer, TuneIn, MusicCast, AirPlay 2, Amazon Music
Amazon Music
AirPlay, Tidal, AirPlay 2
Amazon Music
TuneIn, AirPlay 2
AirPlay, Spotify Connect, Deezer, TuneIn, AirPlay 2, Amazon Music
Analogue 3.5mm input (Aux)
1
0
0
0
0
0
1
0
Other connectors
Ethernet (Network/RJ-45)
Ethernet (Network/RJ-45)
USB
Yes
No
No
No
No
Yes
No
No
Type of USB connector
Micro-USB
USB (Type C)
USB powered (only via USB)
Yes
Yes
Available colours
Black, White, Silver, Brown, Blue, Red, Yellow, Wenge
Black, White, Grey, Wenge, Beige, Pink, Purple
Black, White, Grey, Wenge, Beige
Black, White, Grey, Blue, Red, Wenge
Black, White, Wenge
Black, White, Gold, Wenge, Beige
Black, White, Silver, Wenge
Black, White, Grey, Blue, Wenge
Black, White, Grey, Turquoise, Brown, Blue, Red, Yellow, Green, Wenge, Beige, Pink
White, Silver, Grey, Wenge
Black, White, Silver, Grey, Wenge
Dimensions (WxHxD)
Depth
65 mm
99 mm
135.9 mm
98 mm
119.7 mm
73 mm
119.7 mm
100 mm
69 mm
97.9 mm
109 mm
Height
72 mm
43 mm
99.1 mm
42 mm
161.45 mm
86 mm
247 mm
89 mm
74 mm
84.3 mm
203 mm
Width
193 mm
99 mm
200.4 mm
98 mm
119.7 mm
148 mm
119.7 mm
100 mm
181 mm
97.9 mm
170 mm
Product weight
0.53 kg
0.3 kg
1.04 kg
0.18 kg
1.85 kg
4.1 kg
1.76 kg
0.33 kg
0.54 kg
0.35 kg
2.15 kg
Features
Water resistant, Supports NFC, Mobile app for controlling features, Built-in microphone, Docking Station for mobile/iPod
Support for internet radio, Mobile app for controlling features, Built-in microphone
Display
Support for multiroom, Built-in microphone
Support for internet radio, Remote control, Water resistant, Mobile app for controlling features, Support for multiroom, Built-in microphone
Voice control, Clock radio with alarm, Support for internet radio, Display, Mobile app for controlling features, Built-in microphone
Support for internet radio, Water resistant, Mobile app for controlling features, Support for multiroom
Water resistant
Voice control, Mobile app for controlling features, Support for multiroom, Built-in microphone
Support for internet radio, Display, Supports NFC, Mobile app for controlling features, Support for multiroom
Smart speaker (virtual assistant)
No
Yes
Yes
Yes
Yes
Yes
No
Yes
No
Yes
Yes
Type of voice assistant
Amazon Alexa
Amazon Alexa, Google Assistant
Apple Siri, Google Assistant
Amazon Alexa, Google Assistant
Amazon Alexa, Google Assistant
Amazon Alexa
Apple Siri
Amazon Alexa, Google Assistant
Battery operated
Yes
No
No
No
No
No
Yes
No
No
Battery life (running)
12 h
12 h
Battery type
Li-Ion
Li-Ion
Electric (not USB)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes