Triangle sound-signature category. Which brands?

Agreed regarding a fair resemblance to ML and perhaps also Quad ES in terms of speed and airiness despite the conventional box design.

Here's a nice piece that does a good job of communicating what makes the Triangle Titus 202s so special:

http://www.tnt-audio.com/casse/titus202_e.html

While on the subject of the "Triangle sound," anybody hears the Altea? Upscale Audio is closing out a discontinued model.

I bought Heliade (3-driver) model from Upscale Audio. Good deal at $699.00. Clean fresh sound , incredible imaging .Tweeter might sound metallic sometimes on bad passages or bad recordings. Bass is dry and insufficient (I usually hate bass), but this bass is weak not in extension but in color, character of the bas. Micro dynamics and detail retrieval is great. Play really well at low volumes as oppose to my ATC 12s.
Overall Triangle provides very engaging sound for very little money.
Speakers are all man made materials , I have heard that they changed that and cover their basic speakers with wood veneer now.
Now that i owned them for a few weeks I can say (for those who might be curious) that upgrade from Triangle while staying in the same sound signature would be the De Vore speakers.

Dkzzz,

The things you describe are the reasons why I like my smaller Triangles so much.

I use a sub with them for very respectable full range sound, but they are pretty game alone as well delivering a nice clean bass down to about 60 hz or so, ad show no signs of stress or breakup at higher volumes even despite their small size (but only with sufficient amplification).