Compare Sony WH-1000XM4 vs Sennheiser HD 450BT vs Sennheiser HD 820
Variants
HD 820
HDV 820
Connectivity
Ports
Gold-plated L-shaped stereo mini plug
USB-C
[Input] 6.35 mm + 4.4 mm + XLR-4 | [Output] XLR, RCA, Coax, Optical, USB-B
Wireless Connectivity
Bluetooth 5.0, NFC
Bluetooth 5.0
Construction
Battery | Capacity
600 mAh
Cable
Single-sided (detachable)
3 m
Colors
Black, White
Drivers
1.57 ", dome type (CCAW Voice coil), Aluminum coated LCP
Form Factor
Wireless headphones, over-ear headphones
Headphone Type
Dynamic headphones, Closed headphones
Magnet
Neodymium
Microphone
MEMS
Speakers
Dynamic, closed
Dimensions
Weight
238 g
Function
Bluetooth Codecs
SBC, AAC, LDAC
SBC, AAC, AptX, AptX Low Latency
Bluetooth Profiles
A2DP, AVRCP, HFP, HSP
Microphone Pickup Pattern
Dual Beamforming
Noise Cancellation
Yes
Performance
Battery Life
30 h (NC on) / 38 h (NC off)
30 hours music playback via Bluetooth with ANC activated
Charging Time
2 h
Frequency Response
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)
18Hz to 22kHz (-10 dB)
103 dB at 1 kHz, 1V
Impedance
300 ohms
Max Sound Level
108 dB (1 kHz/0 dBFS)
103 dB at 1 kHz, 1V SPL
Microphone Frequency Response
80 Hz to 6000 Hz (-3 dB)
Sensitivity
105 dB / mW (1 kHz)
Production
Availability
2020 Summer
Debut
2020-08-06
2020 CES
Made In
Germany
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