sealed 3-ways

all the above....hales,vandy,dunlavy....as jond said, hales are at incrdibly low prices....they were a deal at the new prices

PMC are not sealed speakers. It uses transmission line design which is ported on the bottom. They're just using ATC mid drivers and that's about it. They do sound nice but totally different philosophy as ATC.

TLs, Sealed and Aperiodic enclosures all share similar characteristics in reducing the impedance peak of the enclosure at its resonance, which also lowers the overall Q of the box. They also share a 12dB per octave roll off in the bass region. You should get similar results from the other designs as you do with a sealed enclosure. The TL and Aperiodic are more efficient however.

Viridian, true but that "Passive radiator" is active at lower frequency's and not passive at that point. It is a very unique design with an overall "Q" of .7 A rather smart piece of engineering.

>Brian what is your budget? if you can afford go for the bigger ATC speakers, they work basically as closed box speakers, the openings do not act as your typical bass reflex, they are only there to take some pressure off the woofers.
i got SCM35s and am very pleased with them, great value, solid engineering and performance. one thing - you would need a good strong amp for them.