Hi efficient speaker, bass problems

Wes, absolutely! :-)

The Aerials use a 10" woofer, and that damn port. The midbass has a 15" driver and the bass uses an 18" driver.

I understand that field coil works the best down on the low side. Some say it is the best bass possible. I haven't been fortunate to hear this yet, but I've heard that it is fast, dynamic, and detailed. And way above my paycheck. :-)

Would be nice if the poster new what hi eff means and its not 91db or 94db designs. So the threads title is wrong poster has not heard bass problems in Hi eff just a improper system match with a moderately efficient design. So to me the whole premise of this thread is wrong.

Dan ed, perhaps I'm mistaken, but I was under the impression that field coil drivers usually have power limitations. I would guess that could be a problem with bass drivers.

JohnK, I don't know of an absolute criterion for "hi eff". FWIW, IMHO, 94 dB is starting to get into the fold.

Unsound, just FWIW, field coil technology in and of itself has no power limitations any more than regular magnetic systems.

Of course, most of the FC drivers we have seen so far are designed for high efficiency applications, and so do not handle all that much power. The midrange drivers in my speakers are FC and are rated at 50 watts. I would not want to be anywhere near them with that kind of power going through them- they are about 109 db 1 watt/1 meter.