Compare Bowers & Wilkins PI4 vs Bowers & Wilkins PX7 vs Microsoft Surface Headphones 2+
Connectivity
Ports
USB-C
3.5mm stereo jack + USB-C
USB-C, 3.5mm
Wireless Connectivity
Bluetooth, USB-C
Bluetooth
Bluetooth 5.0
Construction
Cable
20cm USB-A to USB-C cable
1.2m stereo audio cable + 1.2m USB-A to USB-C cable
1.2 m Audio, 1.5 m USB
Carrying Case
Yes
Colors
Black, Gold, Silver
Space Grey, Silver, Carbon
Matte Black
Drivers
14.2mm full range
43.6mm full range
40 mm Free Edge driver
Form Factor
In-Ear, Neckband Wireless Headphones, Earbuds
Wireless Headphones, Over-Ear
Over-ear, wireless headphones
Headphone Type
Dynamic headphones
Dynamic headphones
Microphone
2x mics for ANC + 2x mics for telephony
4x mics for ANC + 2x mics for telephony
Dimensions
Size | Depth
1.89" / 48 mm
Size | Length
8.03" / 204 mm
Size | Width
7.68" / 195 mm
Weight
40 g
310 g
0.64 lbs / 290 g
Function
Bluetooth Codecs
AptX-Adaptive, aptX-HD, aptX-Classic, AAC, SBC
AptX Adaptive, aptX HD, aptX Classic, AAC, SBC
SBC, aptX
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
Compatibility
Up to 2 simultaneous connections
Fast Charging
3hrs with 15min charge
5hrs with 15min charge
Noise Cancellation
Yes
Yes
Up to 30 dB for active noise cancellation, Up to 40 dB for passive noise cancellation
Sensor
Wear detection sensors on earcups, Touch sensors on earcups
Performance
Battery Life
10hrs Bluetooth with ANC (12hrs w/o)
30 hrs Bluetooth with ANC
Up to 18.5 hours of music listening time or up to 15 hours of voice calling
Charging Time
Full charge in less than 2 hours
Frequency Response
10Hz ~ 30kHz
10Hz ~ 30kHz
20Hz-20KHz
Impedance
20k Ohms
Max Sound Level
Up to 115 dB
Total Harmonic Distortion
0.3% (1kHz/10mW)
0.3% (1kHz/10mW)
Production
Accessory
Ear Tips: S / M / L
Debut
2019-10
2019-10
2021-04
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