Martin Logan SL3 with Musical Fidelity KW 500?


I am keen to change my Primare A 30.1 since I have upgraded my speakers to a pair of Martin Logan SL3; I previously owned a pair of Sonus Faber Grand Piano Home with great results, and was a good match with my integrated amp.
But I am aware that SL3's like lots of power, and I am shrinking my decision on a Musical Fidelity KW500, but I also know that it is a bridged amplifier.
I read on some reviews that you shouldn't use grounded loudspeakers with bridged amplifiers,why is that?
Is there a way to get around this problem? Maybe unground the power cables for the Logans?
Thanks for any suggestion, cheers.
carloscotland

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