Compare Sennheiser HD 450BT vs Bowers & Wilkins PI4 vs Bowers & Wilkins PX7
Connectivity
Ports
USB-C
USB-C
3.5mm stereo jack + USB-C
Wireless Connectivity
Bluetooth 5.0
Bluetooth, USB-C
Bluetooth
Construction
Battery | Capacity
600 mAh
Cable
20cm USB-A to USB-C cable
1.2m stereo audio cable + 1.2m USB-A to USB-C cable
Carrying Case
Yes
Colors
Black, White
Black, Gold, Silver
Space Grey, Silver, Carbon
Drivers
14.2mm full range
43.6mm full range
Form Factor
Wireless headphones, over-ear headphones
In-Ear, Neckband Wireless Headphones, Earbuds
Wireless Headphones, Over-Ear
Headphone Type
Dynamic headphones, Closed headphones
Dynamic headphones
Dynamic headphones
Microphone
MEMS
2x mics for ANC + 2x mics for telephony
4x mics for ANC + 2x mics for telephony
Dimensions
Weight
238 g
40 g
310 g
Function
Bluetooth Codecs
SBC, AAC, AptX, AptX Low Latency
AptX-Adaptive, aptX-HD, aptX-Classic, AAC, SBC
AptX Adaptive, aptX HD, aptX Classic, AAC, SBC
Bluetooth Profiles
A2DP v1.3.1, AVRCP v1.6.1, HFP v1.7.1, HSP v1.2, BLE GATT
A2DP v1.3.1, AVRCP v1.6.1, HFP v1.7.1, HSP v1.2, BLE GATT
Fast Charging
3hrs with 15min charge
5hrs with 15min charge
Microphone Pickup Pattern
Dual Beamforming
Noise Cancellation
Yes
Yes
Yes
Performance
Battery Life
30 hours music playback via Bluetooth with ANC activated
10hrs Bluetooth with ANC (12hrs w/o)
30 hrs Bluetooth with ANC
Charging Time
2 h
Frequency Response
18Hz to 22kHz (-10 dB)
10Hz ~ 30kHz
10Hz ~ 30kHz
Impedance
20k Ohms
Max Sound Level
108 dB (1 kHz/0 dBFS)
Microphone Frequency Response
80 Hz to 6000 Hz (-3 dB)
Total Harmonic Distortion
0.3% (1kHz/10mW)
0.3% (1kHz/10mW)
Production
Accessory
Ear Tips: S / M / L
Debut
2020 CES
2019-10
2019-10
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