Speakers That Won't Sound Too Smooth Or Soft with Luxman L-590AXII

It's definitely not a power issue.  If it wassn't for the FTC regulations on pre-heating an amplifier before testing that's a 120W amp.  Their desire to keep the same form factor as the 509 is the only reason it's rated so small, and so long as you don't attempt to run it at 30W for an hour it is superb. 

Um, Given your choice of speakers and what you are looking for I do wonder if that is the right amp for you.  How about Klipsch Heresys? 

@ryder - I’m using the Luxman 590axii in my office system. Listening as I write, taking a short break from work. I’m using Buchardt s400 mkii speakers. The sound is warm and I know exactly what you mean. 

However, for my office, it actually works to not be overly distracting. A local dealer is coming over to allow me to demo the SoulNote D2 Dac, which apparently has a more forward presentation. I’ll report back on how that goes. 

I, and a number of my audio friends, really like the sound I’m getting with Spatial Audio M3 Turbo S speakers. It’s my longest running combo- I’ve had them paired up for 7 or 8 years now. Great thing is, if you find a used pair, they won’t break the bank at around 2-2.5k.

Prior to the Spatials I had Legacy Focus SE’s with the AMT tweeter. They also sounded great, but their bass did not work well with my asymmetrical room. In a properly symmetrical, larger room, I’d get them again in a heartbeat.

As another poster said, that 30wpc rating is misleading, but with both of the above speakers, I doubt the amp ever leaves class A; they’re both about 93 db efficient.

What type of music do you listen to and at what volumes?

I would look for anything with good sensitivity, thinking +88db and +90 would be even better. Also, look for something with a pretty benign impedance curve hopefully not dipping much below 4 ohm. The 590AXII has good current drive but I find in general speakers that are easier to drive tend to have good dynamics, especially at regular volumes, and even at low volumes which is important to me. 

I just ordered a closeout pair of Odeon Midas speakers that are rated at 95db efficiency and 6ohms. Usually a speaker with higher efficiency tend to be physically larger (generalization) but these are interesting because they are slim towers. They might not get a ton of bass (38hz +/-3db) but anything below 40hz is pretty good IMO for a slim efficient speaker. Plus, I have a pair of REL Carbon Specials, so I've got bass response more than taken care of :) The place I got the Odeon Midas from have a couple pairs of Odeon Tosca speakers on closeout available that may be a great match for the 590AXII.

I'd also check out Fyne Audio, Cube Audio, Qualio, Klipsch Heritage (mentioned), Zu, Devore, Spatial, etc.