Nad M33 or something better

Nice! Good choice on the sub!

I’m sure you will end up in a better place this way, but the key is to get teh sub dialed in just right. A good sound meter app like decibel on Iphone along with some streamed white noise as a reference signal can get teh job done fairly well.

FWIW I have KEF ls50metas and use a sub with those in a smaller room. I tune in the sub using the tools mentioned above and this makes a large very clear and noticeable difference. I do not use an active crossover to limit low end going to the mains, which would probably take things to an even higher level, but the results as is is still quite good. R3s are a step above ls50s in terms of their inherent ability to go loud (say above upper 80s db in a modest sized room) with low distortion, but playing things that loud is never good for your ears regardless so always be careful there.

Good luck!.

hegels are used by kef at shows, and i would suggest they do this for good reason, sonically....

+1 @jjss49  I was going to suggest checking out the Hegel integrated amps.  They have a very high damping factor which matters to some speakers esp. in bass reproduction.  Hegel is a relative good bang for the buck.  Not sure how many hours you have on your lovely KEFs but speakers will have more bass presence after they are fully run in.  Enjoy and Cheers

Hegel gets a lot of love here these days but it’s far from the only fish in the sea and not without its own unique flaws, at least in some cases from what I read, mainly with the digital implementation and overall comparative value.

If you do some homework the m33 looks very good in both regards. I have auditioned m33 and my findings to date are consistent with what I read.

I was going to go with an m33 about 2 years ago but ended up trying a Cambridge Evo 150 first, which saved me a nice chunk of change. The m33 would still be a reasonable step up in terms of overall drive capability but I decided I didn’t need the room correction capabilities at this time and the Cambridge offered usb input out of the can which I needed at the time and came in for $2.5K less.

+1 to the add sub consensus