This WolfPack 5 Channel 100/70V Mixer Amp with a Microphone Input simplifies the task of running distributed audio for restaurants, hotels, or anywhere large areas that need background music and/or paging address systems. Connect hundreds of speakers covering acres of area without the need for large equipment racks.

5 Channel 100/70V Mixer Amp with a Microphone Input Features:

• 5-channel (3 microphones and 2 line) mixer/amplifier
• Amplifier rated for 3 different wattages
• 70V, 100V, and low impedance 4~16 ohm speaker output options
• Built-in rack mount ears and 2U height for mounting in a standard 19" equipment rack
• Unbalanced front panel input for MIC 1
• Both balanced XLR and unbalanced TRS and RCA rear panel inputs for MIC 2 and MIC 3
• Phantom power option for MIC 2 and MIC 3
• Two unbalanced RCA auxiliary/line inputs
• One EMC priority input
• Master volume, bass, and treble controls
• Front panel level controls for all inputs
• 0-30dB variable muting for all channels except MIC 1 when MIC 1 is in use
• Built-in short circuit, over-current, and high-temperature protection circuits
• Line level output of mixed signal for connection to other devices

A constant voltage speaker system differs from a traditional 8-ohm speaker system in that it uses a step-up transformer at the audio source to raise the voltage and lower the current on the transmission line. At the speaker end, a step-down transformer converts the signal back to a normal speaker-level voltage. This reduces power loss during transmission, which allows for the use of longer speaker wire runs using smaller gauge wires.

Additionally, a constant voltage speaker system allows for the use of multiple speakers on each channel, without the need for complicated impedance calculations and configurations. In a constant voltage system, all speakers on a given channel are connected in parallel and the complicated impedance calculations are replaced by simple wattage calculations.

Remember, this is not a stereo amp at 70V. On the 4-16 ohm terminal, hook the two speaker plus wires to the 8 ohm speakers in parallel, and the minuses to the common screw. This amp also allows for many more speakers to be run with the 70 or 100-volt taps (with the appropriate transformers) if you want more.

For example, if you want to connect two speakers per channel in a traditional 8-ohm speaker system, you must either connect them in series, which results in an overall 16-ohm impedance, or in parallel, which results in an overall 4-ohm impedance. In the first case, the 16-ohms impedance effectively halves the output power of your amplifier, resulting in lower overall volume levels. In the latter case, the 4-ohms impedance means that your amplifier will have to work harder and must be rated as stable at 4 ohms. Adding a third speaker to the mix would complicate it further, producing either a 24-ohm or 2-ohm overall impedance. Note that very few amplifiers are stable under 2-ohm loads, so that is usually not an option.

On the other hand, with a constant voltage system, you consider first the RMS output wattage of the amplifier. This should be reduced by 20% to compensate for insertion loss. For example, if using a 100-watt amplifier, the total load from speakers should not exceed 80 watts.

This amplifier features three microphone inputs and two auxiliary inputs, each of which is active and mixed into the line and speaker level outputs. When an EMC input trigger is detected, all outputs except MIC 1 are muted, allowing for the clear broadcast of important messages. The amplifier can drive a speaker array consisting of one or more speakers presenting a 4~16 ohm load or to one or more 70V or 100V speakers connected in parallel as part of a large public address system.

The mic priority and EMC are different functions. The Mic Priority that you are asking is an easy setting. Use the MIC 1 Input on the front of the amp. Adjust the Mute dial on the back to set how much other audio is allowed to pass. If you want total mute, then turn the dial all the way. You can use any mic with a 1/4" cable Balanced or Unbalanced (TS, TRS). It is best to use a mic with its own on/off switch because the mute will engage anytime the system "hears" a signal from the mic. We recommend our Desktop Paging Mic. Your emergency system will close the loop which mutes all inputs except for Mic 1.

The EMC feature allows you to connect your audio system to your fire safety alarm. When the alarm is triggered, the Audio will mute except for Mic1, so you can give evacuation instructions.

Why not buy this 5 Channel 100/70V Mixer Amp with Microphone Input today?