Last may I encountered a small problem with my kW550.
After reading all the excellent reviews on this website concerning MF products, I decided to contact John. After a nice hi-fi conversation I decided to send in my kW550. And at the same time asked John to do the full upgrade. Changing the cables and installing WBT connectors.
After a few weeks got the unit back and its playing since without any problems.
And the sound,words cannot describe the difference. It’s now a much much more musical amplifier. Enjoying now music every evening.
The upgrade was not cheap,but worth every penny.
Now this amp should be called MF kW550 JS modified.
One problem still remains. What can John do for my CD player ?
Should contact him asap.

Peter van de Waeter