Sony WH-CH520 vs Sony WH-CH730N

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WH-CH520 compared with WH-CH730N

	SonyWH-CH520	SonyWH-CH730N
Overview
Released
Released	March 2023	September 2026
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	Closed
Impedance
Impedance	–	25 ohms
Bluetooth codecs
Bluetooth codecs	SBC and AAC	SBC, AAC and LC3
Lossless over USB-C
Lossless over USB-C	No	No
Drivers
Drivers	Bluetooth response 20 Hz to 20,000 Hz at 44.1 kHz sampling	Dynamic driver; wired response 6 Hz to 20,000 Hz (JEITA), Bluetooth 20 Hz to 20,000 Hz at 44.1 kHz sampling; 100 Ω powered on, 25 Ω powered off; sensitivity 108 dB/mW powered on, 100 dB/mW powered off
Noise cancelling detail
Noise cancelling detail	–	Dual Noise Sensor technology; Ambient Sound Mode and noise-cancelling switch
Audio features
Audio features	DSEE upscaling and customisable equaliser in Sony | Sound Connect (formerly Headphones Connect)	DSEE upscaling and customisable audio settings in Sony's app
Battery
Listening time (maker's claim)
Listening time (maker's claim)	Up to 50 hours	Up to 50 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 75 hours with noise cancelling off; call time up to 35 hours with noise cancelling on or 40 hours off
Fast charging
Fast charging	3 minutes gives up to 1.5 hours; full charge approximately 3 hours	3 minutes gives up to 1 hour of playback; full charge approximately 3 hours
Design
Weight
Weight	147 g (better)	207 g
Bluetooth
Bluetooth	5.2	6.0
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	Physical buttons for playback, volume, power and noise-cancelling/ambient selection (Techtesters)
Microphones
Microphones	Built-in call microphone with noise suppression processing	Precise Voice Pickup combines beamforming microphones, optimised placement and AI noise reduction
Fit and ear tips
Fit and ear tips	Adjustable padded headband, soft earpads and swivelling earcups	Folding over-ear headband
Water resistance detail
Water resistance detail	No water resistance rating published	No water resistance rating published
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)	LE Audio, multipoint, Fast Pair and Swift Pair; Bluetooth profiles A2DP, AVRCP, HFP and HSP; Sony's current specifications list LC3 and LE Audio, although SoundGuys' launch review suggests LE Audio may need a later firmware update; USB-C is charging-only (Techtesters)
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, White, Pink, Beige, Blue
In the box
In the box	Headphones and USB charging cable; no carrying case listed	1.2 m detachable headphone cable with gold-plated L-shaped plug, warranty card and reference guide; no carrying case or USB charging cable listed