I ordered 1 to use with our Sennheiser G3 / G4 belt packs.
the input is normally at -24dB with the headsets, these had to be at -33dB to get the same signal.
Lots of noise floor!
almost no low, very high
feedback cancelation is also not what it should be (certainly not for a targeted microphone)
he was so bad that I ordered a 2nd because I thought the 1st was defective.
2nd was just as bad.
disappointed in this product.