Sennheiser HDC 55 User Manual
HDC 55 NoiseGard™
Products for Industry | Stereo Headphones with
NoiseGard™ Active Noise
General Description
First class stereo headphones with NoiseGard™ active noise compensation
of up to approx. 10 dB. The HDC 55/HDC 551 NoiseGard™ headphones are
small, light, robust and comfortable to wear. The ear pads can easily be
changed, and the headphones can be supplied with any company logo
printed on them (from 500 pieces).
Features
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Light
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Compact design
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Swivelling earpieces
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Robust
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Replaceable ear pads
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Excellent frequency response
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HDC 551 with in-line battery pack
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Company logo option
Compensation
Cat. No. 004860 HDC 55-16
Cat. No. 004859 HDC 55-26
Cat. No. 005222 HDC 551-16-0
Cat. No. 005223 HDC 551-26-0
Technical Data
Frequency response .................................................20 – 18,000 Hz
Transducer principle.................................................. dynamic, open
Nominal impedance ................................................................. 270 Ω
THD ...............................................................................................< 1 %
Active noise compensation..........................................10 dB ± 3 dB
(between 300 – 900 Hz)
Operating voltage
HDC 55-16/-26...........................................11 – 16 V DC, typ. 7 mA
HDC 551............................................................... 2 x AA size battery
Operating time............................................................... approx. 60 h
Ear coupling ...................................................................... supra-aural
Contact pressure........................................................... approx. 1.6 N
Weight (without cable)..............................................approx. 115 g
Connection cable................................................... 1.4 m, dual-sided
Connectors
HDC 55-26............................special right angled 3-pin connector,
2.5 mm jack and 3.5 mm double mono jack,
seat powering (ARiNC type C2)
HDC 55-16............................special right angled 2-pin connector,
2.5 mm jack and 3.5 mm stereo jack,
seat powering (ARiNC type C1)
HDC 551-16-0 ........................... 3.5 mm right-angled stereo jack,
battery powering (ARiNC type A1)
HDC 551-26-0 ...............right-angled 3.5 mm double mono jack,
battery powering (ARiNC type A2)
Recommended Accessories
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Hygiene pads Cat. No. 081452
Product Variants
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HDC 55-26, 3 Klinkenstecker: 2.5 + Doppel 3.5 Cat. No. 004859
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HDC 55-16, seat powered, 2.5 mm Klinke + 3.5 mm
stereo jack (=Doppelstecker) Cat. No. 004860
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HDC 551-16-0, battery powered Cat. No. 005222
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HDC 551-26-0, battery powered Cat. No. 005223
2-pin special connector 3-pin special connector
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