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Acrobat Spec Sheet

From the beginning......
                     built for broadcast

The DMH 948 ACS headset begins with the proven and time-tested construction of our DMH920 communications headset. From that headset the DMH 948 ACS inherits its durability, lightweight comfort, concealed wiring, adjustable head bow, and trimness of design. In all other ways the 948 has been designed from scratch for broadcast applications.

Rather than being tailored for speech clarity, the ear speakers have wide, pleasing, music quality frequency response. The muffs are deep and covered with a plush material for superior comfort. (A supply of washable/disposable covers is included.).

The newly engineered microphone boom is a flexible gooseneck that is adjustable over a wide range of positions, and which is damped to drastically reduce noise.

The microphone is mounted on the end of the boom using an elastic spider-like suspension; a miniature version of those used on large, studio quality condenser microphones. The inter- changeable microphone capsules are electrically connected via a trim but secure threaded fitting. Once connected, the capsule is pressed firmly into the elastic suspension. A miniature pop filter is then slid onto the end of the capsule.

Four, true condenser (not electret), microphone capsules are available: omni -directional, cardioid, cardioid with low frequency roll-off, and hyper-cardioid. These are true studio-quality microphones.

A fully shielded microphone preamplifier, of a quality to match the microphones, is securely mounted and protected inside the ear cup.

The cable is soft and flexible, with a molded splitter leading to lengths of the microphone side and the earspeaker side cables long enough to accommodate any mixer.

Both connectors feature metal shells and gold plated contacts.

Technical Information:

Headphone:

Microphone Preamp:

Acoustic principle:

Closed

Phantom Power:

24 - 48V

Driver principle:

Dynamic

Current Drain:

1.7mA

Design principle:

Circumaural

Electrical impedance:

200Ω

Frequency Response:

14 - 24kHz

Wear and tear parts:

Part No.

Continuous power rating:

100 mW

Ear Cushions L&R:

41-6085

Sound pressure level:

94dB

Dust protector:

18-6052

Distortion:

K2 <0.85%
K3 <0.40%

Pop filter:

99-6275

Pressure on ear:

~6.0N

Inner Band, elastic suspension:

99-6276

Weight without cable:

12.5 oz

Rubber band, elastic suspension:

99-6277

Length of cable:

9.8 ft including split portion

 

Connectors:

Mic - 3-pin XLR
Headphone - ¼ in phone plug

Microphone Capsule Specifications:

Linear Omni

Standard Cardioid

Cardioid with roll-off

Hyper-Cardioid

 
KA 100 LK  Linear Omni

Frequency response:

10 – 20kHz

Sensitivity:

6 mV/Pa

Signal to noise ratio CCIR:

67 dB

Equivalent noise CCIR weighted:

27 dB

 

Signal to noise ratio DIN/IEC:

80 dB

Equivalent SPL rated @ DIN/IEC:

14dB

Max SPL:

132 dB

 

 
KA 200 N Standard Cardioid

Frequence response:

40 - 20kHz

Sensitivity:

7mV/Pa

Signal to noise ratio CCIR:

68 dB

Equivalent noise CCIR weighted:

26 dB

 

Signal to noise ratio DIN/IEC:

81 dB

Equivalent SPL rated at DIN/IEC:

13 dB

Max SPL:

130 dB

 

 
KA 400 N Cardioid with roll-off

Frequence response:

50 – 20kHz

Sensitivity:

7 mV/Pa

Signal to noise ratio CCIR:

68 dB

Equivalent noise CCIR weighted:

26 dB

 

Signal to noise ratio DIN/IEC:

81 dB

Equivalent SPL rated at DIN/IEC:

13 dB

Max SPL:

131 dB

 

 
KA 500 HN Hyper-Cardioid

Frequence response:

40 – 20kHz

Sensitivity:

7 mV/Pa

Signal to noise ratio CCIR:

65 dB

Equivalent noise CCIR weighted:

29 dB

 

Signal to noise ratio DIN/IEC:

78 dB

Equivalent SPL rated at DIN/IEC:

16 dB

Max SPL:

130 dB