Sennheiser Wireless with Kemper Stage
This is the latest EW-D / EW-DP system from Sennheiser. It's digital UHF (not 2.4 GHz).
I was using the Sennheiser EW-D system with the Kemper Power Rack. The receiver is rack-mountable, and this all works as expected. But when using the Profiler Stage, I wanted a smaller receiver that worked on batteries. The regular EW-D and EW-DX systems are half-rack units powered by an AC adapter.
Sennheiser recently released the EW-DP (portable) system. The tiny receiver is magnetically mounted on a camera hot shoe. The EW-DP system is compatible with the EW-D systems, and you can purchase the receiver separately.
The receiver comes with an XLR cable, so I used an XLR to 6.5 mm Tip-Sleeve adapter (with a built-in Lo-Z to Hi-Z transformer). Everything works great. The magnetic mount snaps right onto the Stage and tenaciously sticks in place.
The transmitter and receiver can run on AA batteries, but I use the Sennheiser rechargeable battery pack for 7-10 hours of runtime.
Links to the equipment mentioned.
Sennheiser EW-D CI1 instrument set
https://en-us.sennheiser.com/ew-d-ci1-set
Sennheiser EW-DP EK receiver (comes with rechargeable battery)
https://en-us.sennheiser.com/ew-dp-ek
XLR to 6.5 mm Lo-Z to Hi-Z impedance transformer/adapter (It doesn't have to be this Shure model. A generic one will work.)
https://www.amazon.com/Shure-A85F-Tra…h/dp/B0006NMUHW
I recently switched to the Sennheiser EW-DX system because the half-rack receiver handles two channels. This means I can fit the receiver for the guitar and vocal mic AND the IEM transmitter in a single 1U slot in my rack unit. Typically, you wouldn't mount the IEM transmitter and guitar/mic receiver in the same rack unit, but I'm running external antennas outside the rack - so it's all fine.
Sennheiser EW-DX Dual system
https://en-us.sennheiser.com/ew-dx-base-set
Sennheiser IEM G4