Good news,

Yesterday I received the small cheap Craaft active monitor. I had to play last night so could test immediately...

No problems at all. Incredible loud and no distortion.
The cheapest way worked best..

Diki,

I saw your latest comment... This is not what I meant.
I meant IF capable of receving as low as 80HZ, there is a higher chance that it can produce undistorted sounds from the VR760.
It is not very important how loud these low sounds are since as low as 80hz is rarely used. But if you send a 80z signal to a speakersystem which cannot handle these low signals properly you will have distortion.
All other affordable small active monitors start at 200hz, which in my opinion was a big part of the problem.
Anyway problem solved and my back is very pleased with this..

Fred