Pre3 into KAT6550 anyone?

[Richard]

Ah! just seen John's posted almost the opposite about the earth connections! Idea's the same - try whatever is opposite of what you have!

Rich

[RobHolt]

Thanks guys, extremely helpful as ever and I'll experiment with the ideas you've both suggested once the Pre3 is built.
I'll wait as with the pre3 I might not have any issues and TBH with the screen lifted as John suggests it isn't bad at the moment.

On a different note, I'm quite shocked at how well the 6550 drives little insensitive mini monitors. I brought the amp out of retirement to drive some 94dbw Tannoys but though I'd try some 83dbw monitors to see what happened.
Plays bloomin loud and clean - far exceeded my expectations.