Problem: You need to add 3 mics to a mixer, which only has one available channel.

Solution: Insert a ProMIX between the mics and the mixer. Each mic channel on the ProMIX has both phantom power and low-frequency cut selectable via DIP switches plus a level control. The balanced XLR line output can be connected to a mic input on the mixer and headphones or a powered monitor can be connected to the Phone/Aux output. And if AC power is not available, the ProMIX runs on batteries as well.

ART ProMIX Three Channel Microphone Mono Mixer Specifications

• Maximum Gain: +60dB
• Input Impedance: 600 O
• Maximum Input Level: -14dB
• Maximum Output Level: +14dB
• Output Impedance: 600 O
• Total Harmonic Distortion: 0.0002
• Low Cut: -3dB @ 100Hz
• Clip Headroom: 3dB
• Output: Phantom Power 12V DC
• Power: 12V DC (adapter) / 2x 9V (batteries)
• Dimensions: 5.625×3.75×1.75 inches (143mm x 92mm x 45mm)
• Weight: 1.5lb (680g)