Data Sheet
FEATURES
Lightweight with extra soft cushions for
excellent wearing comfort
Headphone with very accurate sound re-
production for professional applications
Microphone for audio transmission in
highest broadcast quality
Microphone can either be worn right or
left hand side
ActiveGard™ (on/off switch) for
protected hearing
Reliable performance over long lifetime
for safe investments
Swivelling ear cap for single sided
listening
Modular concept of boom, cable and
cushions for highest flexibility
ARCHITECT’S
SPECIFICATIONS
A broadcast headset has to be provided with
a dynamic hyper-cardiod pattern micropho-
ne. The microphone has a shock mounted
capsule for absorbing structure born noise. The
short flexible part of the boom secures right
positioning of microphone. The headphones
have a high maximum sound pressure level.
The ActiveGard™ limiter technology protects
hearing from volume peaks above 105 dB. The
swivelling ear cap allows listening to the envi-
ronment whenever needed. The headset is light
weighted, provides expandable split headband
and extra soft ear cushions and headband
paddings for outstanding wearing comfort even
during long production days. Following the mo-
dular concept, ear cushions and paddings can
be replaced easily. The modular set-up of the
26-II family permits different variants of cables
and connectors. Corresponding cable-II family
is copper material reinforced with Kevlar® for
highest durability. The special shape with short
coiled part absorbs structure born noise coming
from cable perfectly.
The HMD 26-II applies to the requirements of demanding broadcast applications.
The dynamic microphone has been re-engineered and features excellent acoustic
performance, great suppression of surrounding noise with a sophisticated
answer for lowest structure born noise. Microphone boom can be worn on either
right or left hand side and short flexible boom part guarantees correct micro-
phone positioning.
The closed, supra-aural headphones
have a high maximum SPL with very
good passive noise attenuation.
They are equipped with ActiveGard™.
This limiter can be activated or
deactivated.
Also available:
The HMD 26-II-S,
a single-sided variant
of the HMD 26-II.
TECHNICAL DATA
HEADPHONES
Transducer principle .............................................. dynamic, closed
Ear coupling ............................................................supra-aural
Frequency response ...............................................20...18,000 Hz
Impedance ...............................................................50 Ω mono / 100 Ω stereo /
...................................................................................600 Ω HMD 26-II-600
Characteristic SPL ...................................................105 dB SPL at 1 kHz, 1 mW
...................................................................................107 dB SPL at 1 kHz, 1 V
Maximum SPL ........................................................ActiveGard™ switched on:
...................................................................................105 dB SPL at 1 kHz
...................................................................................ActiveGard™ switched off:
...................................................................................127 dB SPL at 1 kHz, 200 mW
Passive noise attenuation ....................................approx. 18 dB
Distortion.................................................................< 0,5% at 1 kHz)
Contact pressure ....................................................approx. 3.9 N
MICROPHONE
Type .......................................................................... BMD 424
Transducer principle ............................................. dynamic, noise compensating,
hyper cardioid
Frequency response ...............................................40...16,000 Hz
Output voltage .......................................................0.4 mV/Pa at 1 kHz
Impedance ...............................................................300 Ω
Continued on page 2
HMD 26-II Dynamic Broadcast Headset.