Adding to this 6 years old thread, as recently I'm planning to upgrade to 275 Mk 6 in monoblock setup.
I have been already running 275 mk 5 in monoblocks for the last 13 years. And my experience is very much similar to that @lissnr detailed in his post. Broader, deeper sound stage, more airy representation, defined placing of instruments.
However, I must say that the strength of monoblocks became more obvious when I moved from c2300 to c12000 and also added dCS Rossini as the frontend player. (My speakers remained the same in the last 13 years - Sonus Faber Cremona M)
Currently thinking of upgrading from mk5 to mk6 in monoblock setup. Originally I was considering 2301. But given the price difference and size of my room (13x15x11) I thought of moving to mk6. Also heard mixed feedback on 2301.
Anyone, here have experience with running 2301s ?
Regards,
Sourav