RDL SF-PA100A - Format-A to 100 W Mono Audio Amplifier (70 V or 100 V)The SF PA100A is an audio power amplifier that receives three audio channels on an RJ45 Format A connector. A selector feeds Pair A, Pair B or Pair C audio to the amplifier that provides a 70 V or 100 V constant voltage amplified output. At the normal gain setting, the output provides 100 watts for an audio level of +22 dBu. The three Format A pairs feed through to the LOOP OUT jack to feed additional amplifiers or other Format A receivers. Input gain