"Don Pearce" wrote in message
...
On Fri, 19 Oct 2007 09:11:54 -0400, "Arny Krueger"
wrote:


"Eeyore" wrote in message
...


Don Pearce wrote:

"Keith G" wrote:

To spare my remaining active braincell (see other recent post) could
someone kindly tell me what the speaker sensitivity figure for 1 Watt
would be if the brochure (IMF TLS 80s) quotes:

'Efficiency measured via Pink Noise at 1 metre for 40 Watts = 98 dB'

That's 82dB

I should have read the question properly shouldn't I ?

Yes. It's 82dB (AES method). That's remarkably insensitive.

IME, not atypical for high end speakers.

I think the sensitivity of my NHT 2.5i speakers is in the same range.

Low efficiency is how you get deep bass out of small boxes, ya know! ;-)

I don't think anyone is going to call the IMF a small box. But then I
suppose it isn't really a box at all.

The tech analysis of transmission line speakers I've seen say that its
simply a very wasteful way (in terms of volume versus bass extension versus
efficiency) to make a vented box. That may help explain the large size, all
other things considered.