Open Page 165 of MCM Full Line Catalog 56 by MCM Electronics
paging and prosound rdl line level mixing amplifier three channel audio mixer combines up to three line level signals to a single line level ... ptt push to talk function to hands free automatic muting and audio signal sensing for autopoweron function sensitivity and release ... 24~33vdc 30ma ground referenced mcm part 555-st-vox1 only $98.87 audio/video self-gated preamplifier ·self gated operation ·led level