Professional Headset - TV / Radio - Broadcast Applications
$449.95
General Description
The closed and supra-aural headsets HMD 26 are lightweight and designed for use in broadcast applications at TV and Radio. The headphones are dimensioned for high maximum SPL. HMD 26 provides high wearing comfort in combination with a good noise attenuation. All variants of HMD 26 for Broadcast are equipped with ActiveGard which protects the user from volume peaks.
The dynamic microphone with hyper-cardioid characteristic satisfies with perfect broadcast sound up to 16 kHz. It is mainly designed for applications in noisy environments. Another important feature is the less sensitivity against structure-born sound. The gooseneck microphone can be used either on left or right-hand side. The microphone boom allows an individual adjustment at the right position.
600 Ohm per system, dynamic microphone, steel cable with connector XLR-3 and 1/4 inch jack, 3 foot length.
Features
- Lightweight
- Extremely comfortable to wear, even for extended listening, due to the two-piece automatic headband and soft ear pads
- Single-sided cable routing
- Headphones for high maximum SPL
- ActiveGard (switchable) - safeguards you from volume peaks above 105 dB
- "Flip-away" headphone allows single-sided listening
- Dynamic mikrophone (hyper-cardioid pattern)
- Flexible microphone boom, can be worn on either left or right-hand side
- Muting of microphone once mic position is upright
- cable, microphone boom and ear pads can be changed easily due to modular concept
- Warranty 2 years
Professional Headset - TV / Radio - Broadcast Applications
$449.95
Technical Data
| Transducer principle (headphones) |
dynamic, closed |
| Ear coupling |
supra-aural |
| Frequency response |
20 Hz - 18,000 Hz |
| Impedance |
HMD 26-100: 50Ω mono / 100Ω stereo |
| Impedance |
HMD 26-600: 300Ω mono / 600Ω stereo |
| Impedance |
HMD 26-600S-7: 600 mono |
| Characteristic SPL (1 kHz, 1 mW) |
105 dB |
| Characteristic SPL |
HMD 26-100: 115 dB at 1 kHz, 1V |
| Characteristic SPL |
HMD 26-600: 107 dB at 1 kHz, 1V |
| Max. sound pressure level (active) |
127 dB SPL at 1 kHz, 200 mW (ActiveGard switched-off) |
| Total harmonic distortion (THD) |
< 0.5% |
| Contact pressure |
approx 3.6 N |
| Transducer principle (microphone) |
dynamic microphone (hyper-cardioid) |
| Frequency response |
40 Hz - 16,000 Hz |
| Nominal impedance |
300Ω |
| Output voltage |
0.4 mV/Pa at 1 kHz |
| Operating temperature |
-15 °C... +55 °C |
| Storage temperature |
-55 °C... +70 °C |
| Weight w/o cable |
HMD 26-600-XQ: 7.1 oz (200 g) |
| Weight w/o cable |
HMD 26-600S-7: 4.6 oz (130 g) |
Professional Headset - TV / Radio - Broadcast Applications
$449.95
Recommended Accessories
| Part/Accessory |
Article No. |
| Cable-7 |
502360 |
Unterminated steel wire cable, 2m
|
| Cable-X3K1 |
502459 |
Steel wire cable with XLR-3 connector and 1/4"
|
| Cable-X4F |
502461 |
Steel wired cable with XLR-4F connector (for clearcom boxes and intercoms)
|
| Cable-X5 |
502462 |
Steel wire cable with XLR-5 connector.
|
Professional Headset - TV / Radio - Broadcast Applications
$449.95
Variants
| HMD 26-100-7 |
|
Model #502452 |
$424.95 |
| 100 Ohm per system, dynamic microphone, steel cable with open ends, 2 m length. |
| HMD 26-600-7 |
|
Model #502464 |
$424.95 |
| 600 Ohm per system, dynamic microphone, steel cable with open ends, 2 m length. |
| USHMD 26-600S-7 |
|
Model #502465+502360 |
$680.00 |
| (Kit) USHMD26-600S-7 = 502465 + 502360 (headset and steel cable with open ends) |
 |
$449.95
Glossary
| Contact pressure |
| The wearing comfort of a set of headphones is determined not only by its weight but also by the force with which the earpieces are pressed onto the ears. This force is given in newtons (N), whereby 1 N corresponds to the compressive force which a mass of about 100 g exerts on a solid surface. The DIN Standard 45500 Part 10 limits the maximum permissible contact force to 5 N. Values of between 1.3 and 4 N are common, although lower values apply for open headphones. Higher values can be found in the case of closed headphones. Here, a higher contact pressure is required in order to achieve sufficient sealing, which is important for the reproduction of low frequencies. |
| Ear coupling |
| A distinction is made between headphones which are worn on the external ear (supra-aural) and those which surround the ear (circumaural). Open headphones have foam ear pads that rest on the ears or ring pads that surround the ears. Closed headphones, on the other hand, nearly always have circumaural ear pads. |
| Frequency response |
| The frequency response of a microphone is given within the limits defined by the manufacturer. In studio condenser microphones it is generally within the range of between 20 Hz and 20 kHz. |
| Impedance |
| Impedance expresses the AC resistance of a microphone or a set of headphones. It is dependent on frequency and is given at 1 kHz as the so-called nominal impedance. Impedance is measured in ohms. In recent years, an industrial standard has developed, setting the impedance of headphones at 50 or 600 ohms. Sennheiser headphones are manufactured according to this standard, thus practically ruling out connection problems. With microphones, the input impedance of the following microphone amplifier should have at least three times the value of the nominal impedance, in order to prevent it from unnecessarily attenuating the microphone signal. |
| Max. sound pressure level (active) |
| The maximum sound pressure a unit can reproduce before a given THD is reached. |
| Nominal impedance |
| See impedance. |
| Operating temperature |
| Gives the range of temperatures at which a unit can be operated without damage. |
| Output voltage |
| The (signal) voltage which a unit supplies at its output. |
| Storage temperature |
| Gives the range of temperatures at which a unit can be stored without damage. |
| Total harmonic distortion (THD) |
| Total harmonic distortion is a measure of non-linear harmonic distortion and is given in %. Non-linear harmonic distortions are signals which were not present in the original before the signal was converted by the headphones. These unwanted signals are caused by the diaphragm, whose movements do not precisely move in time with the electric signals that cause it to move. Unfortunately, this is a feature of all electroacoustic transducers. Although it cannot be completely eliminated, suitable steps can be taken to minimise it. However, the user is not interested in why this distortion takes place but in how great the level of distortion must be for it to become perceptible. According to the findings of several research projects, a total harmonic distortion of 1% in the frequency range of 100 to 2000 Hz is imperceptible. Below 100 Hz, the perceptibility threshold lies at 10%. |
| Transducer principle (microphone) |
| Operating principle of a microphone. The transducer may be dynamic, piezoelectric or condenser. |
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