Luxman 590AX II Break-In

Congratulations! It is great when you make a move that results in what you desire. McIntosh is known to be very midrange and bass heavy… sounds like the solution to your dilemma. 
 

On the other hand, in some other systems room treatments could be the solution.

@ghdprentice 

+1

My "wheelhouse" in music is bass/midbass and a warmer midrange. I have auditioned many amps/integrateds and I have not heard an amp that betters the MC611s in the bass/midbass range. The closest I heard was the Gryphon Diablo 300. I think the big MACs have it beat, though.

As far as highs, McIntosh is a little "light" on the top end. I fixed that problem by pairing my source DAC into the C2700 with Nordost Valhalla 2s. That cable has completely transformed the sound of the system. 

OP,

Outstanding. I have auditioned some of the top level Nordost… Odin 2… incredible wires. 
 

Greatto hear you are happy.

Break in is probably 200hrs, but the speakers you have arent the greatest match and also the 590 doesnt give great bass if your looking for that pop. Its a refined neutral amp that pairs well with easy to drive speakers.  I am using Silverline Sonata II and it sounds sweet.  The 590 pairs best with silk/soft dome tweeters.

I just picked up a Luxman 590AXII and moved out a McIntosh MA6600, with my 85db Harbeth 30.1 speakers the Luxman delivers as much or at times more bass then the McIntosh ever did. I see the Keff’s are 85db as well, goes to show specs aren’t always exact. My understanding is every db in the 85 range takes considerable more power, maybe the Keff is closer to 83-84 which needs that extra 100 watts. Great feeling when you get the problem solved and can pass on your experience to others. Great thread guys. 😎