tube friendly speaker rec

Reference 3a's might be the ticket.

I have the Triangle Comete es with my Primaluna PL2 and have used it with both KT88's and EL34's. Got a very good deal for them new (under $500) and they sound great. I think the tubes tame the high end. I was very impress with the bass, deeper and fuller than the BW DM602's i had before.

If and when i upgrade its a toss up btw the De Capo's and a Single Driver like Cain and Abby.

A used Merlin TMX will be very tube friendly and is one of the finer sounding speakers in a smallish monitor configuration.

I had some Triangle Comete ES and absolutely loved them. I sold them to a friend and each time I visit him, I am shocked at how good they sound for $500. Very tube friendly in many ways. They aren't bright at all if your electronics are of good quality. But they don't have much bass authority. The Triangle Altea ES is another very good choice with extra bass and yet still efficient because it is a 2.5 way.

Totem would be similar to your Quads in terms of power requirement. Some Dynaudios have a nice impedence curve but they can be a little thick in the lower mids which doesn't work with certain tube amps.

All the Reference 3A are great options.

Also Amphion from Finland, like the Argon 2. It doesn't dip below 7 ohms and has fantastic reviews. They also have efficient small floorstanders.

Another option is the Coincident Triumph UHS from Canada. It only needs a few Watts to sound good.

Ditto the Omega speakers from Conneticut. I have been very curious about the SuperHemps which only need like 5W and are inexpensive for the quality of finish and sound you are getting. One of the best high efficiency deals going IMO. I used to have a pair of Grande 8 and still regret having sold them.

Arthur

Audio Note or JM Reynaud work well