sealed 3-ways

One man one goal one mission. One heart one soul just one solution. One real decision: find the right speaker!

Since ATC is on your list, you might want to check out PMC IB1. PMC speakers are designed in a very similar way (3 " dome mid range) and are also used professionally in studios.

BTW - they didn't have one vision when it came to speakers; Roger Taylor is a customer of ATC and Brian May is a customer of PMC.

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.