The TLT1 from Speco is a Telephone line input matching transformer connects telephone systems to auxiliary input of public address amplifiers for telephone paging. It also allows for the placement of a "Music on Hold System" to a telephone system when connected to the 25 volt line output of a PA amplifier/tuner/tape. It has an impedance of 500/600 (line) ohms.
See any errors on this page? Let us know.