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Technical Data

Modulation: N/A
Carrier frequencies: 2.3 / 2.8mHz 5kHz
AF frequency response: 40 - 15kHz
S/N ratio: 60 dB A rms
THD: <2% at 120bD

Transmitter: SZI-1015:
Dimensions: 250 x 100 x 80 mm
RF input connector: BNC - socket
RF output link connector: BNC - Socket
Weight: 1,3 kg
Current consumption: 0,7 A bei 25 V
Operating voltage (mains): 25-30 V DC with dedicated NT1015 PSU
Input voltage range: 50 mV - 3 V
Effective radiated power: 2 W
IR Diodes: 72
Max. coverage area: 400 m
Threshold for automatic on/off function: 50 mV

DDA - Disability Discrimination Act compliant

Sennheiser SZI-1015
The SZI-2015 is a wideband infra-red slave radiator for high quality mono or stereo audio operation. Requires SZI-1015T or SET810 modulator/emitter or SI-1015 modulator. Due to its compact size and relatively high radiating power, the SZI-1015T modulator/radiator is an ideal choice for medium-sized rooms up to 400m, for covering recesses or for applications which require transmission of audio information to well defined zones, e.g. in cinemas, theatres, meeting rooms, offices, lecture theatres, conference rooms, board rooms, etc.

One transmitter can be picked up by several Stethoset receivers.

Sennheiser SZI1015 infrared hearing assistance transmitter

SZI-1015 IR slave transmitter

Sennheiser RI810 Stethoset infrared receiver


RI810 Stethoset IR receiver


Sennheiser RI150LL infrared receiver with neck loop


RI150LL neck loop

converts IR to a personal induction loop, which can then be picked up by any standard hearing aid with a "T" position.


  • 2-Watt radiator with a maximum coverage area of 400 m
  • chaining the signal to additional radiators
  • features monitoring diodes and a separate barrier strip with RF and DC outputs for connecting radiators
  • Wide range of mounting accessories for the radiator

Price to rent        Full Sennheiser price list       Compare to SET810

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