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Technical data
Acoustic principle
Frequency range
Impedance
Total harmonic distortion
Active compensation
Headband pressure
Weight without cable
Cable
Power supply
Operating time
Display
Scope of delivery
NOTES
®
Noisegard
mobile
dynamic, „open-air"
20 Hz - 18,000 Hz
160 ohms
< 1 %
10 dB + in a range of 400 to 1,000 Hz
approx. 1.6 N
approx. 110 g
one-side only, total length 2 m
with 3.5 mm-stereo jack plug for audio signal
2 x 1.5 V mignon (AA) alkaline-manganese
batteries or 2 x 1.2 V storage batteries
mignon (AA) 600 mAh
approx. 80 hrs. (batteries)
approx. 20 hrs. (storage batteries)
green LED as battery check
1 headphone HDC 451
1 adapter to double mono jack plug 3.5 mm
1 adapter to stereo jack plug 6.3 mm
®
mobile
NoiseGard
noise for greater comfort.
®
mobile
NoiseGard
system for medical purposes!
Listening to loud music ? - No !
Listening to music via headphones tempts
into listening to louder music than loud-
speakers would. A high volume that affects
your ears for a longer period can cause
lasting hearing defects. Protect your sound
hearing; Sennheiser headphones are good
even for low volume musical enjoyment....
HDC 451
helps to reduce
is not a noise protection
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