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Sennheiser DDA 400 portable infrared system

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The Sennheiser DDA 400 is a portable infrared hearing system to assist hearing impaired people. The system is supplied with everything needed to provide basic ir hearing support (up to 400 sq/m), and is stored in a heavy duty transport case. A sign is also provided to advise customers that the system is available.

The system is very easy to use without any prior experience of the equipment. Each system is supplied with laminated user instructions.

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01686 628012

General Description

The Sennheiser DDA 400 is a portable infrared hearing system to assist hearing impaired people. The system is supplied with everything needed to provide basic ir hearing support (up to 400 sq/m), and is stored in a heavy duty transport case.

The system comprises of an ir radiator mounted on a telescopic table stand, a sensitive condenser microphone with desktop microphone base, three induction neck loop ir receivers (for use with hearing aids), three stethoset ir receivers, a ten way charger, connection leads and a transport/storage case.

The system is very easy to use without any prior experience of the equipment. Each system is supplied with laminated user instructions.

Features

Quick to setup
Easy to use
Coverage up to 400 sq/m
Suitable for confidential meetings
Equality Act compliant
Mic and line inputs

Delivery Includes

1 SZI 1015-T DDA radiator
1 ME 34 cardioid mic capsule
1 MZH 3015 gooseneck microphone
3 RI150
3 RI150LL
1 L 151-10 10-way charger
1 NT 92-UK PSU
1 KM 233 table stand
1 protective storage case
1 line input cable
1 mic input cable

Technical Data

SZI 1015-T DDA radiator
IR diodes 72
Average radiating power 2 W
Max. Coverage area 400 m2
Carrier frequency range 30 kHz – 6 MHz
RF input 50 mV – 3 V, approx. 5 kΩ
Inputs/outputs BNC sockets/barrier strip
Operating voltage 25 – 30 V DC (via NT 1015 or SI 1015)
Current consumption – operation 0.7 A at 25 V – stand-by  max. 60 mA
Dimensions 250 x 100 x 80mm
Weight approx. 1.3kg
ME 34 microphone capsule
Transducer principle (Microphone) pre-polarised condenser microphone
Pick-up pattern cardioid
Acoustics pressure gradient transducer
Frequency response (microphone) 40 Hz - 20 kHz
Impedance 50 Ohm
Min. terminating impedance 1 kOhm
Maximum sound pressure level (passive) 130 dB SPL
Equivalent noise level 26 dB (A)
Equivalent noise level weighted as per CCIR 468-3 37 dB
Phantom powering P12 - P48
Current consumption 250 μA
Weight approx. 3 oz
Dimensions ø12 x L18 mm
MZH 3015 gooseneck microphone
Dimensions 150 mm
Diameter 6 mm
Weight 73 g
NT 92 power supply
Output voltage: approx. 13 V DC  
Output current: approx. 200 mA
RI 150 stethoset receiver
Modulation FM, Mono
Carrier frequencies 2,3 MHz
Frequency response (headphones) 18.....18000 Hz
THD, total harmonic distortion <1 %

More Information
ManufacturerSennheiser

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