Sony WH-CH520 vs Sony WH-CH720N

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WH-CH520 compared with WH-CH720N

	SonyWH-CH520	SonyWH-CH720N
Overview
Released
Released	March 2023	March 2023
Sound
Type
Type	On-ear	Over-ear
Noise cancelling
Noise cancelling	No	Yes
Transparency mode
Transparency mode	No	Yes
Driver size
Driver size	30 mm	30 mm
Back
Back	Closed	–
Bluetooth codecs
Bluetooth codecs	SBC and AAC	SBC and AAC
Lossless over USB-C
Lossless over USB-C	No	No
Chip
Chip	–	V1
Drivers
Drivers	Bluetooth response 20 Hz to 20,000 Hz at 44.1 kHz sampling	30 mm dynamic driver; 7 Hz to 20,000 Hz (JEITA, wired, switched on); sensitivity 108 dB/mW switched on, 99 dB/mW switched off; impedance 325 Ω switched on, 31 Ω switched off (1 kHz, wired)
Chip
Chip	–	Integrated Processor V1
Noise cancelling detail
Noise cancelling detail	–	Dual Noise Sensor technology, with two microphones on each ear cup; Ambient Sound Mode adjustable in 20 levels in the app
Audio features
Audio features	DSEE upscaling and customisable equaliser in Sony | Sound Connect (formerly Headphones Connect)	DSEE upscaling; 360 Reality Audio; equaliser in the app
Battery
Listening time (maker's claim)
Listening time (maker's claim)	Up to 50 hours	Up to 35 hours
Battery life detail
Battery life detail	Up to 40 hours of calls and 200 hours on standby; no passive operation or wired playback	Up to 50 hours with noise cancelling off (AAC or SBC); 35 hours with Ambient Sound Mode on; talk time up to 35 hours (40 hours with noise cancelling off); up to 35 hours on the headphone cable with noise cancelling on (50 hours off); DSEE, the equaliser and the voice-assistant wake word shorten battery life; can't be used while charging
Fast charging
Fast charging	3 minutes gives up to 1.5 hours; full charge approximately 3 hours	3 minutes gives about 60 minutes of playback, 10 minutes about 4.5 hours; full charge in about 3.5 hours (0.5 A or higher USB adaptor)
Design
Weight
Weight	147 g (better)	192 g
Bluetooth
Bluetooth	5.2	5.2
Two devices at once
Two devices at once	Yes	Yes
Headphone cable
Headphone cable	No	Yes
Controls
Controls	Physical buttons for playback, calls, volume and track selection; press the play/call button to use the connected phone's Siri or Google voice assistant	Buttons for power, volume up and down, play/call (press twice to skip forwards, three times to skip back; hold for the voice assistant) and NC/AMB; hands-free "OK Google" or "Alexa" wake word
Microphones
Microphones	Built-in call microphone with noise suppression processing	Two noise-cancelling microphones on each ear cup; beamforming call microphones with Precise Voice Pickup technology and a Wind Noise Reduction Structure
Fit and ear tips
Fit and ear tips	Adjustable padded headband, soft earpads and swivelling earcups	Closed, over-ear; synthetic leather and urethane earpads; sliders on both sides of the headband
Water resistance detail
Water resistance detail	No water resistance rating published	No water resistance rating
Works with
Works with	Two-device multipoint, Fast Pair and Swift Pair; approximately 10 m range, profiles A2DP, AVRCP, HFP and HSP; USB-C is charging-only (SoundGuys)	Sony | Sound Connect app (formerly Headphones Connect) for iOS and Android; multipoint connection to two devices; Google Fast Pair and Microsoft Swift Pair; Bluetooth 5.2 Class 1, about 10 m range; A2DP, AVRCP, HFP and HSP
Colours
Colours	Black, Blue, White, Beige; Pink and Yellow added in March 2025; One Piece Black and One Piece White limited editions on the current UK page	Black, Blue, White; Pink added in 2025
In the box
In the box	Headphones and USB charging cable; no carrying case listed	Headphones, USB-C cable (USB-A to USB-C, about 20 cm), headphone cable (about 1.2 m)