Specifications
HD 250BT | 25
Specifications
Model: HD 250BT
Bluetooth
Wearing style
Bluetooth® on-ear
Ear coupling
on-ear
Transducer principle
dynamic, closed-back
Transducer
32 mm
Frequency response
20 Hz to 22,000 Hz (-10 dB)
Sound pressure level (SPL)
110 dB (1 kHz/0 dBFS)
THD (1 kHz, 100 dB SPL)
< 0.3 % (1 kHz, 100 dB SPL)
Microphone principle
ECM
Microphone frequency
response
100 Hz to 10,000 Hz
Microphone pick-up pattern
(speech audio)
omni-directional
(1 microphone)
Power supply
built-in rechargeable lithium-polymer
battery: 3.7 V
⎓,
190 mAh
USB charging: 5 V
⎓
, 120 mA max.
Charging time of
rechargeable battery
approx. 3 hrs
Operating time
25 hrs (music playback via SBC) with
headphones' rechargeable battery
Temperature range
operation:
0 °C to +40 °C
charging:
+10 °C to +40 °C
storage:
–20 °C to +60 °C
Relative humidity
operation:
10 to 80 %, non condensing
storage:
10 to 90 %
Weight (headphones)
approx. 125 g
Magnetic field strength
1.6 mT
Version
Bluetooth 5.0 compatible, class 1, BLE
Transmission frequency
2,402 MHz to 2,480 MHz
Modulation
GFSK,
π
/4 DQPSK, 8DPSK
Output power
10 mW (max)
Profiles
HSP, HFP, AVRCP, A2DP
Codec
aptX, aptX LL, AAC, SBC
