Compare Bowers & Wilkins PX7 vs Sennheiser HD 450BT vs Sennheiser HD 820
Variants
HD 820
HDV 820
Connectivity
Ports
3.5mm stereo jack + USB-C
USB-C
[Input] 6.35 mm + 4.4 mm + XLR-4 | [Output] XLR, RCA, Coax, Optical, USB-B
Wireless Connectivity
Bluetooth
Bluetooth 5.0
Construction
Battery | Capacity
600 mAh
Cable
1.2m stereo audio cable + 1.2m USB-A to USB-C cable
3 m
Carrying Case
Yes
Colors
Space Grey, Silver, Carbon
Black, White
Drivers
43.6mm full range
Form Factor
Wireless Headphones, Over-Ear
Wireless headphones, over-ear headphones
Headphone Type
Dynamic headphones
Dynamic headphones, Closed headphones
Microphone
4x mics for ANC + 2x mics for telephony
MEMS
Speakers
Dynamic, closed
Dimensions
Weight
310 g
238 g
Function
Bluetooth Codecs
AptX Adaptive, aptX HD, aptX Classic, AAC, SBC
SBC, AAC, AptX, AptX Low Latency
Bluetooth Profiles
A2DP v1.3.1, AVRCP v1.6.1, HFP v1.7.1, HSP v1.2, BLE GATT
Fast Charging
5hrs with 15min charge
Microphone Pickup Pattern
Dual Beamforming
Noise Cancellation
Yes
Yes
Performance
Battery Life
30 hrs Bluetooth with ANC
30 hours music playback via Bluetooth with ANC activated
Charging Time
2 h
Frequency Response
10Hz ~ 30kHz
18Hz to 22kHz (-10 dB)
103 dB at 1 kHz, 1V
Impedance
20k Ohms
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)
Total Harmonic Distortion
0.3% (1kHz/10mW)
Production
Debut
2019-10
2020 CES
Made In
Germany
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