SMALL, but efficient speaker

Klipsch Herseys.

Klipsch Heresy's will absolutely not go low. I have quite a bit of experience with them and trying to get the most out of them. They're fun speakers, and a great bargain for the money, but they do not do bass well at all. After 50hz they drop like a lemming off a cliff.

Of the small offerings in stand mounted speakers there is Reference 3A DeCapo. I also like the speakers I use, Galante Rhapsody's which use concentric drivers. Neither go real low, but both will have bigger balls in the bottom end than the Klipsch. Galante's Symphony speakers may be a better choice if you are into serious low bass. Klipsch with low bass are the Khorns (in corners) which are not exactly small, Cornwall (II), and the Forte II's and Chorus II's. The later are probably a bit less refined and resolving, but are really fun balls-to-the-wall rock speakers without spending a fortune.

Floorstanders are the way to go if you really want bass with no sub. How low-powered are we talking here? Which amp? What is your budget? Probably should have asked that first.

Marco

Joseph Audio RM7si monitors.
Spendor S5e small floorstanders.

Small size, high efficiency, and "enuff balls down low for Deep Purple, Zep and the like". Not possible all in the same speaker.

Given that larger speakers apparently aren't practical in your room, I suggest you relax your "high efficiency" requirement, and if necessary get a used Pioneer or Panasonic receiver for some decent cheap wattage.

How 'bout that Rega R3 you mentioned??

Duke