high-efficiency loudspeakers

Note that my still surprisingly great sounding Klipsch Heresy IIIs cost (from a reputable Ebay seller/dealer with factory warranty) about 1500 clams including shipping. For a beautiful sounding 99db efficient 3 way I  think they are unique little speakers that will raise the roof with my massive 12wpc single ended tube amp. Unfortunately it does require payment in actual clams, which need to be refrigerated. 

Yes, currently using Hawthorne silver Iris drivers in a open baffle, sounding very very nice now as my kt77 gold lion tubes in my amp have settled in very nice.With high efficiency speakers I recommend all tubes or tube pre and SS amp.Most of these speakers have horns or compression drivers.For me I won't buy a horn loaded speaker but you may like them .

I have Horning Eufrodite Ellipses which have 98db efficiency.  They sound really well with my Frankenstein 300b monos and First Watt SIT-3 amp.

hocheye  Hawthorne uses a horn loaded coaxil so you did buy a horn speaker

One thing about the Heresy IIIs that's interesting and noticeable when looking at them (which I often do since they're in front of my eyeballs when listening) explains part of the musical coherence they display in spades...measured from the center of the tweeter horn to the center of the woofer is only about a foot...to the edge of the woofer much less of course...all due to the mid horn being narrow top to bottom and placed right on top of the woofer (even has a cutout in the same radius as the woofer to help in the proximity), and the tweeter horn right on top of the mid. For a 3 way that's pretty close, and the design works amazingly well with tseamless blending of the drivers...a good thing.