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

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.

"Eiron" wrote in message
...
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)


Thanks - both of you!

They'll be on eBay shortly (Sunday night start) but *collect only* -
beautiful sound (radio voices in particular) but the bass in my little
room is like wading through syrup!!

In article ,
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'

A doubling of amplifier power gives an increase of 3dB. So at 20 watts it
would be 95dB. And so on.

--
*Wrinkled was not one of the things I wanted to be when I grew up

Dave Plowman London SW
To e-mail, change noise into sound.

In article ,
Keith G wrote:

They'll be on eBay shortly (Sunday night start) but *collect only* -
beautiful sound (radio voices in particular) but the bass in my little
room is like wading through syrup!!

If the room is causing problems at the bass end it will cause the same
problems on male speech.

--
*Learn from your parents' mistakes - use birth control.

Dave Plowman London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" wrote in message
...
In article ,
Keith G wrote:

They'll be on eBay shortly (Sunday night start) but *collect only* -
beautiful sound (radio voices in particular) but the bass in my little
room is like wading through syrup!!

If the room is causing problems at the bass end it will cause the same
problems on male speech.

**Indeed. However, like any good speaker (and the TLS80 was a good speaker)
with decent bottom end, they require decent damping. I doubt Keith has heard
them with an amp that has decent damping. Crappy Chinese valve amps won't do
the job.

Trevor Wilson

"Dave Plowman (News)" wrote in message
...
In article ,
Keith G wrote:

They'll be on eBay shortly (Sunday night start) but *collect only* -
beautiful sound (radio voices in particular) but the bass in my
little
room is like wading through syrup!!

If the room is causing problems at the bass end it will cause the same
problems on male speech.


There is a big difference between Classic FM's Master Bates working
Proximity Effect to death and, say, Bjork's 'Headphones' or Oi Va Voi's
'Further-Deeper'...

"Trevor Wilson" wrote in message
...

"Dave Plowman (News)" wrote in message
...
In article ,
Keith G wrote:

They'll be on eBay shortly (Sunday night start) but *collect only* -
beautiful sound (radio voices in particular) but the bass in my
little
room is like wading through syrup!!

If the room is causing problems at the bass end it will cause the
same
problems on male speech.

**Indeed. However, like any good speaker (and the TLS80 was a good
speaker) with decent bottom end, they require decent damping. I doubt
Keith has heard them with an amp that has decent damping.


Conjecturising again Trevor?

Check this out:

http://www.apah69.dsl.pipex.com/show...000%20spec.JPG


Crappy Chinese valve amps won't do
the job.


Tell you what - if you can personally replicate my one and only Chinese
300B SET for 365 UKP apiece, I'll order 10 of them off you....

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'

It sounds like the standard AES test method. You apply 1 watt of input power (in
the speaker's operating frequency band - coulde be swept sinewave or you can use
noise) and measure the SPL at 1 metre in an anechoic or free space environment.

98dB is typical of 'PA' speakers rather than hi-fi.

Graham