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-   -   Techy speaker sensitivity question (https://www.audiobanter.co.uk/uk-rec-audio-general-audio/7002-techy-speaker-sensitivity-question.html)

Keith G October 19th 07 08:49 AM

Techy speaker sensitivity question
 

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





Don Pearce October 19th 07 09:05 AM

Techy speaker sensitivity question
 
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

Eiron October 19th 07 09:05 AM

Techy speaker sensitivity question
 
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.

Keith G October 19th 07 09:12 AM

Techy speaker sensitivity question
 

"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!!




Dave Plowman (News) October 19th 07 09:15 AM

Techy speaker sensitivity question
 
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.

Dave Plowman (News) October 19th 07 09:37 AM

Techy speaker sensitivity question
 
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.

Trevor Wilson[_2_] October 19th 07 09:58 AM

Techy speaker sensitivity question
 

"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



Keith G October 19th 07 11:17 AM

Techy speaker sensitivity question
 

"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'...



Keith G October 19th 07 11:20 AM

Techy speaker sensitivity question
 

"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....




Eeyore October 19th 07 11:44 AM

Techy speaker sensitivity question
 


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


Eeyore October 19th 07 11:47 AM

Techy speaker sensitivity question
 


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


Don Pearce October 19th 07 11:53 AM

Techy speaker sensitivity question
 
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

Phil Allison October 19th 07 12:00 PM

Techy speaker sensitivity question
 

"Keith G"

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'

??



** I seriously doubt that figure is even faintly for real.

1. 40 watts of pink noise requires a power amp of at least 500 watts to
deliver (ie 12 db peak to rms ratio).

2. 40 watts of continuous input ( to some crap pommy hi-fi speaker) causes
horrendous voice coil heating and hence many dBs of thermal sound
compression.

3. 40 watts of input will cause partial demagnetisation of the magnetic
force on the voice coil and more dBs of sound compression.


It's utter ******** !!.

It's not a measurement, but a falsely calculated estimate based on
hypothetical guesses.

IOW - the Yankee Dodge method.

Peeeeeeeukkkkkkeee


BTW

Anyone prepared to donate one 303 calibre bullet to put a poor dumb animal
called " Keith G" out of its misery ??

Have a heart.




........ Phil



Keith G October 19th 07 12:58 PM

Techy speaker sensitivity question
 

"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...!! :-)



Don Pearce October 19th 07 01:10 PM

Techy speaker sensitivity question
 
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

Arny Krueger October 19th 07 01:11 PM

Techy speaker sensitivity question
 

"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! ;-)



Keith G October 19th 07 01:17 PM

Techy speaker sensitivity question
 

"Don Pearce" wrote in message
...
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 :-)



I believe the trick is to use a small tea chest....

??



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.



Is that what it is? :-)





Don Pearce October 19th 07 01:17 PM

Techy speaker sensitivity question
 
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

Serge Auckland October 19th 07 02:11 PM

Techy speaker sensitivity question
 


"Keith G" wrote in message
...

"Don Pearce" wrote in message
...
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 :-)



I believe the trick is to use a small tea chest....

??



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.



Is that what it is? :-)

The IMFs used plastic foam instead of Dr Bailey's long haired underpants.
They had different densities depending on where they were in the cabinet.
That made the 'speaker largely insensitive to movement whilst shipping.
Long-haired wool didn't take kindly to being shaken about and would tend to
settle.

As to the sensitivity, my TLS50s were similarly insensitive. I first used
them with a 30watt SS amp, and the sound was awful. A scope across the
terminals confirmed the amp was clipping, almost continuously. A change to
a 75watt amp (93 actually) cured the problem.

Nevertheless, great 'speakers if you've the room, can back them up against a
wall and drive them hard.

S.

--
http://audiopages.googlepages.com



Keith G October 19th 07 03:46 PM

Techy speaker sensitivity question
 

"Serge Auckland" wrote


The IMFs used plastic foam instead of Dr Bailey's long haired
underpants.



That's a relief....


They had different densities depending on where they were in the
cabinet. That made the 'speaker largely insensitive to movement whilst
shipping. Long-haired wool didn't take kindly to being shaken about
and would tend to settle.



I have pulled that stuff out if speakers in the past and it chokes me to
remember it!!



As to the sensitivity, my TLS50s were similarly insensitive. I first
used them with a 30watt SS amp, and the sound was awful. A scope
across the terminals confirmed the amp was clipping, almost
continuously. A change to a 75watt amp (93 actually) cured the
problem.



Out of curiosity I ran those speakers on various amps and got some nice
sounds out of them all really, at various levels - all the way down to
my 3.5 Watt SET. They certainly sounded better on the Technics stuff
(also on eBay now for a Sunday night start) which was very relaxed and
laid-back. There's no doubt, I am going to miss the 'radio voices'
now....



Nevertheless, great 'speakers if you've the room, can back them up
against a wall and drive them hard.



Ooh, er!!

Are we back on midgets and Tom Cruise here? :-)





Trevor Wilson[_2_] October 20th 07 12:57 AM

Techy speaker sensitivity question
 

"Keith G" wrote in message
...

"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


**Provided you've sited them appropriately, they should provide a
respectably flat response with that amp.

Trevor Wilson



Arny Krueger October 20th 07 03:28 AM

Techy speaker sensitivity question
 

"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.



Don Pearce October 20th 07 09:07 AM

Techy speaker sensitivity question
 
On Fri, 19 Oct 2007 23:28:57 -0400, "Arny Krueger"
wrote:

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.


No, not a vented box, but an infinite baffle. The idea is that the
entire back wave is absorbed in the line. Nothing comes out of the
vent, and nothing bounces back at the speaker.

There is a variant in which the line is not stuffed to criticality in
which vent power is used to prop up the low end, but that isn't
strictly a TLS. Forget what it is called right now.

d

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

Arny Krueger October 20th 07 11:01 AM

Techy speaker sensitivity question
 

"Don Pearce" wrote in message
...
On Fri, 19 Oct 2007 23:28:57 -0400, "Arny Krueger"
wrote:

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.


No, not a vented box, but an infinite baffle. The idea is that the
entire back wave is absorbed in the line. Nothing comes out of the
vent, and nothing bounces back at the speaker.


That's one variation of the TL. It's been decades since I heard an IMF, so I
forgot which one they used.

However, if its a sealed box TL, then it is easy to explain how it is less
efficient than the plain sealed box. A well-designed sealed box uses the
resonance of the space behind the driver to improve the efficiency of the
driver at low frequencies. Damp this resonance out, and you've lost a lot of
efficiency.

There is a variant in which the line is not stuffed to criticality in
which vent power is used to prop up the low end, but that isn't
strictly a TLS. Forget what it is called right now.


Let's face it, commercial nomenclature can be kinda loose. :-)



Keith G October 20th 07 11:34 AM

Techy speaker sensitivity question
 

"Trevor Wilson" wrote in message
...

"Keith G" wrote in message
...

"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


**Provided you've sited them appropriately, they should provide a
respectably flat response with that amp.



What happened to the order for the 10 amps?





Trevor Wilson[_2_] October 20th 07 11:51 AM

Techy speaker sensitivity question
 

"Keith G" wrote in message
...

"Trevor Wilson" wrote in message
...

"Keith G" wrote in message
...

"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


**Provided you've sited them appropriately, they should provide a
respectably flat response with that amp.



What happened to the order for the 10 amps?


**These are your words:

"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...."

I assumed you did not expect a reply. However, since you are fishing for
one, here it is:

Send you amp to me, freight paid by you. I'll see what I can do about
replicating the amp for the money suggested. You can then organise to have
the amp collected and freighted back to you when I'm finished examining it.

I must alert you to several things, however:

* Australia is a first world nation and our wage levels are significantly
higher than those in China.
* For that amount of money, there are a raft of excellent amplifiers
available in your local market, which can handily outperform your SET amp
with ease.

Trevor Wilson

Trevor Wilson



Keith G October 20th 07 12:40 PM

Techy speaker sensitivity question
 

"Trevor Wilson" wrote in message
...

"Keith G" wrote in message
...

"Trevor Wilson" wrote in message
...

"Keith G" wrote in message
...

"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

**Provided you've sited them appropriately, they should provide a
respectably flat response with that amp.



What happened to the order for the 10 amps?


**These are your words:

"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...."

I assumed you did not expect a reply. However, since you are fishing
for one, here it is:

Send you amp to me, freight paid by you. I'll see what I can do about
replicating the amp for the money suggested. You can then organise to
have the amp collected and freighted back to you when I'm finished
examining it.



OK, let me see if I can justify the effort and expense of getting you to
replicate what I already know I can get direct from China with no more
than a little Paypal action on my part - I'll get back to you, but if
you don't hear consider that I've taken the decision that I can probably
get by without any amps made by you....



I must alert you to several things, however:

* Australia is a first world nation and our wage levels are
significantly higher than those in China.



No idea/couldn't care less, but if that is the case I guess the next
question would be 'Yes, but for how long?'


* For that amount of money, there are a raft of excellent amplifiers
available in your local market, which can handily outperform your SET
amp with ease.



If you already *know* that (and are not merely conjecturising again) why
do you need me to send you my amp for examination?


Trevor Wilson

Trevor Wilson



You need to turn the Reverb off....





Trevor Wilson[_2_] October 20th 07 06:18 PM

Techy speaker sensitivity question
 

"Keith G" wrote in message
...

"Trevor Wilson" wrote in message
...

"Keith G" wrote in message
...

"Trevor Wilson" wrote in message
...

"Keith G" wrote in message
...

"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

**Provided you've sited them appropriately, they should provide a
respectably flat response with that amp.


What happened to the order for the 10 amps?


**These are your words:

"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...."

I assumed you did not expect a reply. However, since you are fishing for
one, here it is:

Send you amp to me, freight paid by you. I'll see what I can do about
replicating the amp for the money suggested. You can then organise to
have the amp collected and freighted back to you when I'm finished
examining it.



OK, let me see if I can justify the effort and expense of getting you to
replicate what I already know I can get direct from China with no more
than a little Paypal action on my part - I'll get back to you, but if you
don't hear consider that I've taken the decision that I can probably get
by without any amps made by you....


**Kinda what I figured.




I must alert you to several things, however:

* Australia is a first world nation and our wage levels are significantly
higher than those in China.



No idea/couldn't care less, but if that is the case I guess the next
question would be 'Yes, but for how long?'


**Best guess? Another 15 years. Maybe less.



* For that amount of money, there are a raft of excellent amplifiers
available in your local market, which can handily outperform your SET amp
with ease.



If you already *know* that (and are not merely conjecturising again) why
do you need me to send you my amp for examination?


**I presume you like the distortion of the amp you have.

Trevor Wilson



Keith G October 20th 07 09:51 PM

Techy speaker sensitivity question
 

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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

**Provided you've sited them appropriately, they should provide a
respectably flat response with that amp.


What happened to the order for the 10 amps?

**These are your words:

"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...."

I assumed you did not expect a reply. However, since you are fishing
for one, here it is:

Send you amp to me, freight paid by you. I'll see what I can do
about replicating the amp for the money suggested. You can then
organise to have the amp collected and freighted back to you when
I'm finished examining it.



OK, let me see if I can justify the effort and expense of getting you
to replicate what I already know I can get direct from China with no
more than a little Paypal action on my part - I'll get back to you,
but if you don't hear consider that I've taken the decision that I
can probably get by without any amps made by you....


**Kinda what I figured.



No flies on you Trevor!! ;-)






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