Compare DALI IO-4 vs Sennheiser HD 350BT vs Sennheiser HD 820
Variants
HD 820
HDV 820
Connectivity
Ports
3.5mm + USB-C
USB-C
[Input] 6.35 mm + 4.4 mm + XLR-4 | [Output] XLR, RCA, Coax, Optical, USB-B
Wireless Connectivity
Bluetooth 5.0
Bluetooth 5.0
Construction
Battery | Capacity
320 mAh
Cable
3 m
Colors
Army Green, Chalk White, Iron Black, Caramel White
Black, White
Drivers
50 mm free edge paper fibre cone
Form Factor
Over-ear headphones, wireless headphones
Wireless headphones, over-ear headphones
Headphone Type
Closed headphones, Dynamic headphones
Dynamic headphones, Closed headphones
Material
Closed back circumaural (over ear)
Microphone
MEMS
Speakers
Dynamic, closed
Dimensions
Weight
320 g
238 g
Function
Bluetooth Codecs
AAC, aptX, aptX HD
SBC, AAC, AptX, AptX Low Latency
Bluetooth Profiles
HSP, HFP, AVRCP, A2DP
Microphone Pickup Pattern
Dual Beamforming
Noise Cancellation
No
No
Weather Resistance
IP53
Performance
Battery Life
60 h
30 hours music playback via Bluetooth
Charging Time
2.5 h
2 h
Frequency Response
10Hz - 20kHz
18Hz to 22kHz (-10 dB)
103 dB at 1 kHz, 1V
Impedance
25 ohms (Via 3.5mm)
300 ohms
Max Sound Level
100 dB
108 dB (1 kHz/0 dBFS)
103 dB at 1 kHz, 1V SPL
Microphone Frequency Response
80 Hz to 6000 Hz (-3 dB)
Sensitivity
200 mV rms / 175 mV rms
Production
Debut
2019-10
2020 CES
Made In
Germany
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