Amp Suggestions for Harbeth C7es3

The amp and speakers you have are an excellent match. I think your problems lie elsewhere. Naim products are excellent on their own, but the upgraded power supplies really take the products to a new level. I would definitely try a HiCap on the Supernait before ditching this combo, as I think it's going to be difficult to achieve better sound without spending a lot more money. Get a HiCap - it really pulls everything together more than you might think. Also, what are your sources?

Personally I think you may want to try some better interconnects (not knowing what you may be using). I just switched to some Nordost Frey ic's got a much nicer soundstage and imaging. Definitely more air between the instruments and vocals. I also found the same when I switched to Frey speaker cables a couple of years ago.

The Supernait was my first affordable choice when I upgraded my Bryston B100 but I did go the 'dark side'. I ended up with an Octave V70se with a black box (comparable to the HiCap with Naim) with KT88 - 6550 and EL34 output tubes. The HiCap is a great suggestion for your Supernait. Tube rolling for me is a ton of fun. The El34's have all what you seem to be looking for in sound which is what I'm currently listening to. I do also use a Rel B3 sub and would say I'm in heaven. Note I have never heard the Harbeth lineup but I do have the Dynaudio C1's.

8'x10' is a pretty small space. You may want to try some room treatments, diffusors on first reflection points of side walls. You can look at the rear wall when you are done with that.

I think Ryder is on the right track here. However, even before doing room treatments, I would suggest playing around with speaker placement and listening position. Given the room size there may not be much you can do, but it is free and completely reversible. If you can set up the room to listen in the near field, that may give you the sound you want. If you cannot get the sound you want with position changes, room treatments would be the next step. As others have said, the Harbeth/Naim combination is a good one. I would try to get them working in your room before spending money on different components.

My room is 10 X 12. The Harbeth 7's just did not work in there. The HLP3, now that is a good size Harbeth for that room.