Corner speaker suggestions for my room

Corner placement will result in emphasized bass.

Corner speakers usually are designed to use the corner for more bass, thus they use efficient horns for strong enough mids and highs.

AND, the vintage ones have level controls, some come with L-Pads (like mine), others, newer models come with adjustable equalizers designed to balance those known drivers in anticipated locations.

I would NOT want corner speakers without adjustability (actually I want adjustability for any speaker).

Mine, I adjust the mid horn (presence) and tweeter horn (brilliance) L-Pads for when they are out, in single person centered listening position, and do NOT move them, so my alternate toe-in for two off-centered listeners MIGHT benefit from a slight adjustment, but once carefully refined, that’s where the L-Pads are staying. I spent 1-1/2 days last time I refined their setting, best they ever sounded)

Actually, now that I mention it, I just replaced the 15" woofers, I need to get the tools out again.

I use an SPL meter (hole on the bottom for a tripod) at my seated ear level, combined with test tones, 

IF you keep your speakers in the corners (rather than moving them out when listening):

I would not start with a sub or subs, until after I played them for a while so the cones are loosened up, then measure with an SPL, then consider sub(s). 

IF subs, I favor a pair of stereo subs, front firing, no ports, (or if ports, front firing) adjacent to the mains, so that the bass overtones which become directional give you the added imaging of bass, i.e. jazz bass player is ....

Sooo, if you really think you will need/want subs, you do need to anticipate their placement as you mentioned above.

btw, I’m 77, I diddled around with ’more bass’ in my youth, I think ’enough bass’ is smarter and as enjoyable. I favor mains with large woofers, done.

I highly recommend the Pi Speakers 7Pi corner horn.  Very elegant design and very high sound quality. 

Duke

I will second the recommendation from @kennyc. Larsen speakers will work in virtually any room. When I was a dealer for them I satisfied some guys who were ready to give up. For a room your size I would look for a pair of Larsen 4s. Unfortunately only used since Larsen closed when John Larsen passed away a few years ago.

Question on the Larsens, as those are definitely intriguing...seems from what I'm reading they're great against a wall, but not necessarily specifically in corners.  I'm looking at corner placement; any thought on that?