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Comparing 2 robot vacuums

Your shortlist side by side: today’s price, our score and every fact the maker states.

Green is the best of these 2, also when they share the lead.

Sennheiser HD 660S2 × Best on 1 fact Sony WH-1000XM6 × Best on 1 fact
Most important facts
Lowest price 439 €Amazon.de 347 €Saturn best
Score not in our ranking 8.9
Customer rating ★ 4.7 · 49 reviews best ★ 4.3 · 92 reviews
Active noise cancelling – Adaptive
Battery life with noise cancelling – 30 h
Weight 260 g 254 g
Bluetooth version – 5.3
Bluetooth codecs – SBC, AAC, LDAC, LC3
Multipoint – yes
Rank
Rank – rank 4 of 33 with an over-ear fit
Battery
Battery life without noise cancelling – 40 h
Fast charge time – 3 min
Playback from a fast charge – 1 h
Full charge time – 210 min
Wireless charging – no (assumed)
Charging port – USB-C
Build and fit
Form factor same on both Over-ear Over-ear
True wireless same on both no no
Wireless no yes
Acoustic design Open-back Closed-back
Ear pad material Velour –
Wired connection – 3.5 mm jack
Works wired when – Charging
Audio over USB-C – no (assumed)
Driver size – 30 mm
Foldable – yes
Remappable controls – Some controls
Sound
Lowest frequency 8 Hz 4 Hz
Highest frequency 41,500 Hz 40,000 Hz
Impedance 300 Ω 16 Ω
Sensitivity – 102 dB SPL
Equaliser in the app – yes
Spatial audio – yes
Head tracking – yes
Noise cancelling
Noise cancelling control – Automatic only
Transparency mode – yes
Hearing aid function – no (assumed)
Wireless
Devices connected at once – 2
LE Audio – yes
Auracast – yes
Made for – Any phone
Wireless range – 10 m
In use
Wear detection – yes
App – Sony | Sound Connect

Facts as the maker states them. A dash means the maker does not name it. Each model’s page gives the source of every fact. Noise is the maker’s own figure, so we do not judge it, and a customer rating only counts from 20 reviews.

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