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'

??

TIA

On Fri, 19 Oct 2007 09:49:46 +0100, "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'

??

TIA



That's 82dB

d

--
Pearce Consulting
http://www.pearce.uk.com

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.

Graham

On Fri, 19 Oct 2007 12:47:01 +0100, Eeyore
wrote:



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.

Graham

It's a TLS. And it uses the good old B139 driver, which was never the
loudest. A friend of mine bought a pair when they were new and I seem
to remember he paid a fortune for them. I did a quick measure-up and
went home and built my own pair for less than a tenth the price. I
used them for quite a while.

d

--
Pearce Consulting
http://www.pearce.uk.com

"Don Pearce" wrote


It's a TLS. And it uses the good old B139 driver, which was never the
loudest. A friend of mine bought a pair when they were new and I seem
to remember he paid a fortune for them. I did a quick measure-up and
went home and built my own pair for less than a tenth the price. I
used them for quite a while.


And developed your taste for *excessive* bass? :-)

Well mine are on eBay now (Auction No. 270178019709) with a Start Price
of 200 quid, auction starting 9:00 pm, Sunday Night.

(Collect only - *crane* vehicle advised...!! :-)

On Fri, 19 Oct 2007 13:58:21 +0100, "Keith G"
wrote:


"Don Pearce" wrote


It's a TLS. And it uses the good old B139 driver, which was never the
loudest. A friend of mine bought a pair when they were new and I seem
to remember he paid a fortune for them. I did a quick measure-up and
went home and built my own pair for less than a tenth the price. I
used them for quite a while.


And developed your taste for *excessive* bass? :-)

To a midget, Tom Cruise is too tall, I suppose :-)

Well mine are on eBay now (Auction No. 270178019709) with a Start Price
of 200 quid, auction starting 9:00 pm, Sunday Night.

(Collect only - *crane* vehicle advised...!! :-)


It's all that Dr. Bailey's long fibre wool that does it.

d

--
Pearce Consulting
http://www.pearce.uk.com

"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! ;-)

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.

d

--
Pearce Consulting
http://www.pearce.uk.com

"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.

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'

82dB

i.e. 98 - 10*log(40)

--
Eiron.