the box Six Mix Eight

I usually use a " the box pa108" with a 4 chanel macie mixer.
Works great and plenty loud for most bars on my list.
I saw this online and decided this 6 mix 8 would save all the wiring and carrying ,being mixer and speaker all in one.
But not to be, as, either weak preamps, or low tranformer output makes this unit so very quiet. Plus the signal limiter is set very hard and stops guitar or mic sgnals long before it should. I never got round to trying the MP3.
I usually expect top performance from Thomann gear, as always in the past.
This concept is superb, but too cheaply made and certainly not up to performers requirements.
A good try Thomann, maybe an upgrade is neexed on this unit.