RH-AUDIO

※ 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. Description The Main/Spare Amplifier Switch  RH2821M monitors up to five main amplifiers in the pa system,RH2821Mwhich will be switched automatically to the spare amplifier should any one fails,with five independent channels, it can also be operated manually for power switching amplifier  upgrades and maintenance, each channel has a volume control, manual switch,and status indicator. Note: • Only one main amplifier is used in above connection,the Main/Spare Amplifier Switch RH2821M can support connecting five main ...

Pre Amp Amplifier  and Mixer Digital Amplifier " Mixer Amplifier" refers to a constant pressure amplifier with a front stage magnification, which can be directly connected to the microphone and other signal sources without a mixer. The output voltage does not change with the change of the load impedance, that is, a power amplifier that outputs the maximum constant voltage of an audio signal, applying the deep negative feedback, outputs stable voltage, and the magnitude of the load within the rated power range has little effect on the output voltage of the amplifier. In order to reduce the power loss of the transmission line in long distance power transmission, the output transformer needs to be used. The output voltage contains mainly 70V, 90V, 120V and so on. The higher the voltage, the smaller the loss of transmission line. But because of the use of the output transformer, the sound quality is not very good. It's generally used in background music system and cable br...

※ The digital telephone interface  can automatically answer an incoming phone call and broadcast the caller's voice over the PA system. ※ Automatic or manual mode optional. ※ Built-in monitor speaker and volume control. ※ Activation output can be used to trigger other equipment remotely. Description The Telephone Interface RH2818I can automatically answer an incoming phone call and broadcast the caller's voice over the PA system and even to individual zones,and a microphone input is provided for talking back to the caller. By adding a telephone interface to a PA system and being given a fix telephone number,we have introduced the ability to make announcements and paging calls from telephones. Telephones are not special or dedicated functionally in the way that microphones are. They are regular telephones,that might be local to the building, the site, or in fact they can be anywhere,national or even international. Specification Model RH2818I Audio Output /...

The RH-AUDIO   Professional PA Amplifier  is devices that amplify electrical signals that have been adjusted to an appropriate volume and tone sent from the audio source, to a level that can be converted to acoustic sounds by the PA speakers. There are various types and models of PA Amplifier varying in feature, size, shape and output power; including series of Mixer Amplifier, MP3/FM Mixer Amplifier, MP3/FM/Bluetooth Mixer Amplifier, Multiple Zone Mixer Amplifier, Multiple Zone Audio Source Mixer Amplifier, Power Amplifier, Pre Amplifier and public address amplifier . PA System Amplifier : All the RH-AUDIO PA Amplifiers feature high voltage 70V, 100V and low impedance 4-16 ohms speaker outputs provided, the technique of 70V or 100V reduces signal losses on a longer distance and allows easy parallel connection of multiple loudspeakers. All the RH-AUDIO PA Mixer Amplifiers have microphone inputs for voice announcement and aux inputs for background music,main microphone...