«  finally a wireless works without noise! »

I was looking for a wireless system to replace the cables connecting active speakers. it is I finally found a product from ALTO (brand I did not know professionally). I could test it live in a packed room of 250 people in the worst conditions (material placed at 1m only with top screen as the assembly of the people in the room. Well the system has worked perfectly without ever having debonding! delivery lasted more than 7:30 seamlessly with transmitter / receiver distance of 25m . I can not yet give an opinion because the decline in use is too faible.Le system is mains powered and not battery, a + for me.
Only downside, the plan UHF frequency used is not mentioned in the instructions of the manufacturer. I have changed some of my channels wireless microphones.