RDL TX-1W Music On Hold AmplifierThe TX 1W is the ideal choice in on site installations where the central telephone switching unit needs to be fed with music, voice or combined music voice signals. There is a wide variety of telephone instruments in use. When a caller is placed on hold, the audio quality perceived is affected by the callers own telephone, as well as the telephone lines, central switch and on site equipment. Due to these variations, conventional audio amplifiers used