Leben CS600 vs McIntosh MC275

I used the MC275 with Harbeth M-40.1's a few years back and it was a nice combo. I have no experience with the Leben, but I'm sure you'd be fine with either amp.

MC275 has a more gutsy powerful presentation and it is also more fluid. The Leben has better micro dynamics and micro details. It has a certain sparkle in its sound which is makes for a lively presentation.

If your speaker needs more power, get the MC275.

If you listen to Rock, pop, blues, big band more then the more gutsy and driving sound of MC275 will be more enjoyble. If you are into small ensemble Jazz, Acoustic music get the Leben.

I have owned both at different times. Both are worth demo'ing in your room with your equipment and will give different results. Remember your hearing is as different from others as your fingerprints, as is your room & equipment. The Leben is exceptionally well built & has a really great headphone output for late night listening and the ability to run different output tubes if that makes a difference to you.