These are freakishly USEFUL tools! I have used them to manage panel discussions, meetings, Zoom and Skype group meetings, overhead mics, and presentations with audience Q&A.
Features Mic or Line level input and/or output (controls located inside) with intelligent auto-mixing control to get your best sound when multiple mics are in use. Can also be used as a simple mic or line mixer without using the auto-mix algorithm. It's option for either mic or line level output makes it useful for adding additional mics or sources to an otherwise closed system, or one with limited inputs.
They can be configured
in a whole host of ways and easily manage mic or line level signals,
phantom power, gain settings (pads) and can be linked for coordinated
auto-mixing or conventional mixing and balance control across multiple
units.
Multiple mixers can be linked for expanded capability. (You are not limited to just 4 channels - multiple units can be linked to operate synchronously with any combination of conventional or auto-mixing.) This sale is for a PAIR of mixers along with a link cable. They can be used together as one, or separated to be used individually. The pair is currently combined via a dual rack kit (included.)
Internal settings provide custom features, and external controls allow prioritizing mics, gain or mix settings, lockout threshold, and selection of conventional mixing or auto-mix.
Power supply not included.
Note: The required power is via standard coax and is versatile using power supplies at either 12V AC or 14-18V DC, 1 amp or better. Please pay attention to the the voltage & amp ratings for each class of power supply because with an under-rated supply the units might appear to function normally, but with the incorrect power supply it could easily be operating well below it's capability and real potential. I know first hand - the right power supply is what makes these unit's really ROCK.