User manual SENNHEISER RI 150 DATASHEET

[. . . ] RI 150 IR Audio Transmission Technology | Receivers 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 audiology variant RI 250 is fitted with an additional, recessed balance control. [. . . ] 45 g including accupack 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 Recommended Accessories BA 151 accupack Charger for two BA 151 L 151-2 European version L 151-2-120 USA version L 151-2-UK UK version L 151-10 charging unit for 10 receivers Plug-in mains unit for one L 151-10 NT 92 European version NT 92-120 USA version NT 92-UK UK version Plug-in mains unit for two to five L 151-10 NT 2013 European version NT 2013-120USA version NG 2013-UK UK version Replacement earpads, black, firmer version Replacement earpads, transparent, softer version Product Variants RI 150: mono stethoset receiver RI 250: mono stethoset receiver, audiology variant with balance control and higher SPL RI 250 J: Mono stethoset receiver with audio output socket Cat. 040949 137 mm 20 m m Dimensions of the RI 150/RI 250/RI 250 J Cat. 004391 188 mm j j j j j j j j j j j j j j j j j RI 150 IR Audio Transmission Technology | Receivers The RI 150 mono receiver works on the extremely reliable carrier frequency 2. 3 MHz, offering excellent speech intelligibility and good music reproduction due to its wide frequency response. A built-in squelch avoids loud hiss when the signal from the IR radiators is too weak, for example when a receiver is used outside the radiator coverage area. The RI 150 is an elegantly shaped receiver which is very easy to use: the only control the wearer has to operate in order to hear the transmitted signals is a combined on/off/volume control with a small position indicator for reading off the volume. The audiology variant RI 250 has additionally been fitted with a balance control to compensate for hearing differences between the ears. The audiology version has a higher SPL and comes with strips of adhesive tape for covering the apertures on the earpieces. By sealing them, low-frequency response can be altered: the more apertures are covered, the more the lower frequencies are attenuated. Thus, speech intelligibility is increased without increasing the volume. Due to its balance control and the option of altering low-frequency response, the RI 250 can be ideally matched to the ears of its user. At the bottom, the variant RI 250 J is fitted with an audio ouput socket (3. 5 mm jack). Users can wear the stethoset receiver as usual, or they can put the stethoset arms around their neck and connect a pair of headphones to the receiver output socket or have the sound transmitted to a suitable hearing aid via induction couplers or an induction neck loop. The RI 250 J also comes with strips of adhesive tape for altering the frequency response. The receivers are powered by the environmentally friendly BA 151 NiMH accupack. [. . . ] The recharging of the receivers is carried out automatically and takes 10 hours. After that, the charging unit switches to trickle charging. Audio output socket of the RI 250 J Apertures for altering the frequency response Two IR receiving diodes (behind special plastic cover) Audio output, 3. 5 mm jack (RI 250 J only) On/off/volume control Inserted BA 151 accupack RI 150/RI 250/RI 250 J stethoset receiver Excellent ease of operation: The user has only to operate the on/off/volume control RI 250/RI 250 J: Altering the low-frequency response with the adhesive tape included with the unit Three cascaded L 151-10 charging units with NT 2013 (or NG 2013-UK) plug-in mains unit and receivers [. . . ]