※ Connect to 5 main amplifiers and 1 spare amplifier.

※ Automatic detection of fault units,and the first fault detected unit will be

automatically switched to the spare unit,other fault units if later detected

will be brought to your attention by the indicators.

※ Prompt tone will ring should any main unit fails.

※ Indicators have three different indications:Normal,Fault,or Spare.

※ Address setting using decimal system.

The Main/Spare Amplifier Power Switch RH2821M monitors up to five main amplifiers in the pa system,which will be switched automatically to the spare amplifier should any one fails,with five independent channels, it can also be operated manually for power amplifier upgrades and maintenance, each channel has a volume control, manual switch,and status indicator.

RH-AUDIO develops, commercial speaker system manufactures, and markets highly reliable sound products of Commercial Sound System.

RH-AUDIO was incorporated in the year 2006 and began his business of manufacturing commercial PA sound system, providing applications of sound reproduction/reinforcement for a variety of venues such as conference halls,shopping malls,school auditoriums, churches, commercial buildings, industrial sites, gardens ,or an entire outdoor complex, etc.