Compare DALI IO-4 vs Bang & Olufsen Beoplay H95 vs Microsoft Surface Headphones 2
Connectivity
Ports
3.5mm + USB-C
USB-C + 3.5mm
USB-C, 3.5mm audio jack
Wireless Connectivity
Bluetooth 5.0
Bluetooth 5.1
Construction
Battery | Capacity
1200 mAh
Buttons
4, Power button, Mute button, Volume dial (right ear), Noise Cancellation dial (left ear)
Cable
1.25 m audio cable with 3.5mm mini-jack for corded Connectivity + 1.25 m USB-A to USB-C cable for Charging
1.2 m Audio cable, 1.5 m USB cable
Carrying Case
Fabric carrying case included
Colors
Army Green, Chalk White, Iron Black, Caramel White
Black, Grey Mist, Gold
Light Gray, Matte Black
Drivers
50 mm free edge paper fibre cone
40 mm Electro-dynamic titanium driver
40mm Free Edge speaker
Form Factor
Over-ear headphones, wireless headphones
Over-Ear Wireless Headphones
Headphone Type
Closed headphones, Dynamic headphones
Dynamic headphones, Closed headphones
Magnet
Neodymium magnets
Material
Closed back circumaural (over ear)
Aluminum, Titanium, Lambskin leather, Cowhide leather, Fabric, Polymer
Microphone
4 x MEMS for voice Mic (2 mics sharing with ANC) + 4 x Dedicated MEMS mic for ANC function (2 mics in each earcup)
Dimensions
Size | Depth
80 mm
48 mm
Size | Height
165 mm
204 mm
Size | Width
185 mm
195 mm
Weight
320 g
323 g
290.3 g
Function
Audio
Dolby Atmos, Transparency mode
Bluetooth Codecs
AAC, aptX, aptX HD
SBC, AAC, aptX Adaptive
SBC and aptX
Noise Cancellation
No
Active Noise Cancellation
Up to 30 dB for active noise cancellation, Up to 40 dB for passive noise cancellation
Operating System
Windows 10, iOS, Android, MacOS
Weather Resistance
IP53
Performance
Battery Life
60 h
Up to 38 hours with active Bluetooth and Adaptive Active Noise Cancellation / Up to 50 hours with Bluetooth
Up to 20 h (Bluetooth, ANC on)
Charging Time
2.5 h
3 hours
Frequency Response
10Hz - 20kHz
20Hz ~ 22kHz
20 Hz – 20 kHz
Impedance
25 ohms (Via 3.5mm)
12 ohms in passive mode
Max Sound Level
100 dB
Up to 115 dB
Sensitivity
200 mV rms / 175 mV rms
101.5 dB @ 1kHz/1mW
Production
Debut
2019-10
2021
2020-05
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