My band has IEM transmitters from multiple brands across different frequency bands: 488-512MHz, 566-590MHz, and 905-925MHz. This unit supports all of them (470-960MHz according to its specs), and it's powering them all too. I paired it with a Sennheiser A1031-U omnidirectional antenna that also works across that entire frequency spectrum, and it has worked flawlessly for us.

As a bonus (off-label usage), I have 3 IEM transmitters powered from the COMBINE 4, and I made a custom DC cable that allows me to use the 4th power connector to power a Midas DN4816-O that is feeding the audio from our mixer into the IEMs.

I purchased an RF Venue Combine4 along with a Distro4 and Diversity Fin Antenna (all by RF Venue) from Sweetwater recently. After installation and great tech support from Sweetwater and RF Venue, my rack was ready. I just used it to run multiple wireless mics and 9 wireless IEM packs in a heavy RF environment. My system was run on the same stage with a production company running 8 wireless microphones and 8 wireless IEM packs....and another stage close enough for stray signals to reach us, plus a ton of LED lighting. Wireless coordination was intense to say the least but thanks to the Distro4, Combine4 and the D-Fin Antenna the show went off beautifully. Even with signals coordinated, the RF noise floor was very high. But with proper distribution and combination all I had to do was find the right angle for the D-Fin and right location for the IEM antenna to focus on the wireless mics and reject the rest of the interference. When running multiple receivers and transmitters distribution, combination and remote antennas are a must. The other great benefit is the power distribution. Having no wall warts in your rack makes for a very clean installation.

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