the t.bone freeU Twin PT 823

I bought two of these units along with an antenna splitter to build out a 4-wireless channel system for a school.

On paper, they look great. Wide frequency range support, configurability, etc.

Once I got them in hand, the problems started to become clear. The units are extremely plasticcy. Right down to the clip. I doubt they would last very long in any shared-use environment. Also, the transmitters have a power button and then a large, external volume knob. Which doesn't feel great and would be easily knocked. (I don't like anybody changing their gain like this - this was bad research on my part - as it should have been obvious from the pictures).

But things only got worse when I started to set them up. I used by usual method of spacing out the wireless frequencies (which was an odd experience, as this set has groups and channels, but both groups and channels simply are small increments of the frequency range. I couldn't find any further information if this grouping was due to frequency reflections or also why only 4 systems are recommended in the range. This led me to write to Thomann who reassured me that I could just stack the units one or two frequency ranges apart (which seems very strange that they would only recommend 4 systems in such a wide frequency range).

Nevertheless, I persisted however it became immediately obvious that different transmitters, even in totally different frequency ranges, would start to interfere with one another when they were near to one another.

Sometimes I even managed to get clear signals on unrelated frequencies when the units were too close together.

I eventually managed to find some frequencies that seemed to work and spaced the units apart. Then I went to take them to our venue. In our initial day of testing, we had drop-outs and frequency hazing, volume level issues, etc for an hour before we had to abandon the units.

Switched back to one of my personal Samson Concert 88 units with the same headset, and it was working fine - no dropouts, volume level stuttering, or other issues.

Have requested the units to be returned. I really hate to have to return anything, but I really just can't use these units for anything and can't recommend them to anybody. Unfortunate, as they look great on paper.