Compare DALI IO-4 vs Sony WH-1000XM4 vs Sennheiser HD 820
Variants
HD 820
HDV 820
Connectivity
Ports
3.5mm + USB-C
Gold-plated L-shaped stereo mini plug
[Input] 6.35 mm + 4.4 mm + XLR-4 | [Output] XLR, RCA, Coax, Optical, USB-B
Wireless Connectivity
Bluetooth 5.0
Bluetooth 5.0, NFC
Construction
Cable
Single-sided (detachable)
3 m
Colors
Army Green, Chalk White, Iron Black, Caramel White
Drivers
50 mm free edge paper fibre cone
1.57 ", dome type (CCAW Voice coil), Aluminum coated LCP
Form Factor
Over-ear headphones, wireless headphones
Headphone Type
Closed headphones, Dynamic headphones
Magnet
Neodymium
Material
Closed back circumaural (over ear)
Speakers
Dynamic, closed
Dimensions
Weight
320 g
Function
Bluetooth Codecs
AAC, aptX, aptX HD
SBC, AAC, LDAC
Bluetooth Profiles
A2DP, AVRCP, HFP, HSP
Noise Cancellation
No
Weather Resistance
IP53
Performance
Battery Life
60 h
30 h (NC on) / 38 h (NC off)
Charging Time
2.5 h
Frequency Response
10Hz - 20kHz
Wired: 4 Hz-40,000 Hz | Bluetooth: 20 Hz–20,000 Hz (44.1 kHz Sampling)/20 Hz–40,000 Hz (LDAC 96 kHz Sampling, 990 kbps)
103 dB at 1 kHz, 1V
Impedance
25 ohms (Via 3.5mm)
300 ohms
Max Sound Level
100 dB
103 dB at 1 kHz, 1V SPL
Sensitivity
200 mV rms / 175 mV rms
105 dB / mW (1 kHz)
Production
Availability
2020 Summer
Debut
2019-10
2020-08-06
Made In
Germany
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