Hi efficient speaker, bass problems

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.

I would think field coil technology would enable higher sensitivity designs by nature due to stronger magnetic fields being made possible than with natural magnetic materials.

I've assumed that the potential for greater magnitude magnetic fields (and hence potentially greater sensitivity in accordance) is the prime benefit of FC technology and why I personally would covet such an approach for its game changing potential ?

Still waiting for the first field coil walsh driver to make it to market.

John Strohbeen, are you listening? I suspect the OHM CLS 2 way Walsh driver approach would lend itself best to pushing the limits using a field coil approach.

DDD drivers might benefit as well but tend to do less of the bass s perhaps less beneficial there.

Full range Walsh drivers can be destroyed relatively easily still using conventional magnetic fields, so perhaps less value there.