Hi efficient speaker, bass problems

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.

Hi Ralph,
Its been some years since I've looked at field coils. How did they solve the huge dc resistance numbers?
Tim

Yeah, who gives a crap about big power when your pulling yourself out of the back wall with 1 watt. ;-) Seriously, I do prefer more power on the low end, 10-20+ on the mid bass and the big honkers are feed with a 500 watt QVC pro amp. I believe in headroom.

Actually, John does have a point. 98dB is what I think of as hi-eff territory.