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RI 150
IR Audio Transmission Technology | Receivers
Features
Wideband stethoset receiver
Extremely reliable transmission due to carrier frequency 2.3 MHz
Extremely lightweight – only 45 g
Excellent speech intelligibility and good music reproduction
Very easy to use
Operates on environmentally friendly rechargeable NiMH accupack
Delivery includes:
RI 150: 1 x RI 150 mono stethoset receiver, 1 x BA 151 accupack
RI 250 and RI 250 J: 1 x RI 250 or RI 250 J mono stethoset receiver,
1 x BA 151 accupack, 1 set of adhesive tape for altering the frequency response
General Description
The RI 150 is an extremely lightweight wideband stethoset receiver which uses the
carrier frequency 2.3 MHz, thus offering excellent transmission reliability. It features
an easy-to-operate on/off/volume control and is powered by the environmentally
friendly BA 151 rechargeable NiMH accupack delivered with the receiver. The audio-
logy variant RI 250 is fitted with an additional, recessed balance control. The RI 250 J
is fitted with a 3.5 mm jack output socket.
Technical Data
Modulation......................................... wideband-FM, mono
Carrier frequency......................................................2.3 MHz
AF frequency response...............................18 – 18,000 Hz
THD...................................................................................< 1 %
Signal-to-noise ratio............................................typ. 70 dB
Max. SPL.........................................................approx. 110 dB
(RI 250 and RI 250 J: approx. 130 dB)
Audio output
(RI 250 J only)............................3.5 mm jack (0.7 V/30 Ω)
Operating time ................................................approx. 6 hrs
Weight .............................approx. 45 g including accupack
Recommended Accessories
BA 151 accupack Cat. No. 004146
Charger for two BA 151
L 151-2 European version Cat. No. 004457
L 151-2-120 USA version Cat. No. 004459
L 151-2-UK UK version Cat. No. 004458
L 151-10 charging unit for 10 receivers Cat. No. 004494
Plug-in mains unit for one L 151-10
NT 92 European version Cat. No. 003357
NT 92-120 USA version Cat. No. 003358
NT 92-UK UK version Cat. No. 003359
Plug-in mains unit for two to five L 151-10
NT 2013 European version Cat. No. 003433
NT 2013-120USA version Cat. No. 003434
NG 2013-UK UK version Cat. No. 054332
Replacement earpads, black, firmer version Spare Part No. 037080
Replacement earpads, transparent, softer version Spare Part No. 040949
Product Variants
RI 150: mono stethoset receiver Cat. No. 004383
RI 250: mono stethoset receiver, audiology variant
with balance control and higher SPL Cat. No. 004373
RI 250 J: Mono stethoset receiver with audio output socket Cat. No. 004391
Dimensions of the RI 150/RI 250/RI 250 J
137 mm
20 mm
188 mm