KEF Reference 4's vs. KEF Reference 207's

Greetings all. I was wondering if anybody might be able to shed some light on the sonic qualities/differences between the older KEF Reference 4's and the newer KEF Reference 207's?

They will be powered by Krell Duo & Trio 300's.

I have no chance to compare the two, so any feedback would be appreciated.

Thanks in advance.


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