Hi efficient speaker, bass problems

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.

Where is mid-eff then?

Hi Unsound,
Its all perception my friend.
I think of low as 82 to 86
mid as 87 to 91
mid-high as 92 to 94
high as 95 +
Thats just me, I can see others not considering a mid high, but in the past, I've been aske say about 93db in sensitivity, is this normal or high. I've always said
"Well, its really mid to high"
Or is 87 really mid-low? Who really knows.