Advice: Amp building
 

On Sun, 30 Jul 2006 17:18:26 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
...
On Sun, 30 Jul 2006 15:26:51 +0100, "Keith G"
wrote:


"Don Pearce" wrote


It all revolves around the use of English, when it comes down to it
really, doesn't it? For me the word better in the context of a
reproduction system has an objective measure to do with comparing what
comes out with what goes in. For you it is just another word for
preferable. We ain't gonna agree here, are we?


Nope! :-)

It's the same with 'accurate' - that means *sounds right* to me, AFAIAC
it's
got bugger-all to do with 'distortion figures'...!!


Tell me, when you are cutting firewood for your speakers what do you
consider to be accurate? Looks right or measures right? I know I can't
eyeball stuff like that - the ruler is boss.


Oh no it ain't....! :-)

Like everything else, you measure some bits and others have to 'toe the
line'...!! (IYSWIM)

Explanation: The designs/drawings I have used often have dimensions like
'53.6 mm' which just ain't going to happen (other than by luck) when working
with MDF - even the board supplier/fabricator near me only claims working
accuracy to 0.5 mm!! And quite often the dimensions simply do not add up!
Sometime you have to decide which is the important dimension and the board
gets cut where it hits the pencil mark!!

Tell you what - if you do come up and get here early enough I can
demonstrate this and you can take a pair of Needles away with you:

http://www.apah69.dsl.pipex.com/needles/needles.htm

(I still have this notion that a couple of people *working nippy* can knock
a pair of these up in an afternoon and emulsion paint dries in 20 minutes
this time of the year!! ;-)

Very generous, but I've built plenty of speakers myself. As for
measuring I found that the important thing was to set up the saw
bench, then make all the cuts for the bits that had to fit exactly
between other bits at the same time. That way it didn't matter exactly
how big they were, but at least they were all the same.

Are they worth having? Oh yes - fine for a small room or used as computer
speakers! (At least *two here* have looked for the subwoofer they don't have
and don't need! ;-)


Not actually possible with those drivers. What you are hearing is
virtual bass, created by your ears/brain from the residual harmonics.
It can sound convincing until you turn on the actual stuff with a sub,
and all of a sudden you realise it really wasn't there.


A sort of small 'high end, cottage industry' manufacturer that renders the
cheap, mass-produced stuff somewhat bland and uninspiring by comparison,
then....???

:-)


Yup - just as well there wasn't an original ice cream they were trying
to make it taste like, innit?


You mean their 'chocolate' flavour doesn't taste like chocolate then??

(What about 'vanilla'? What does that taste like?? :-)



Errrm. It tastes like vanilla. I think they put real vanilla in it.
The chocolate tastes like chocolate because they put real chocolate in
it.

Now there's a thought. If we could put real musicians over there
opposite the settee, that would be real Hi Fi. I might have to shift
the pot plant to fit in a symphony orchestra, though.

d

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

Advice: Amp building
 

"Don Pearce" wrote


Very generous, but I've built plenty of speakers myself. As for
measuring I found that the important thing was to set up the saw
bench, then make all the cuts for the bits that had to fit exactly
between other bits at the same time. That way it didn't matter exactly
how big they were, but at least they were all the same.


Sure. Standard procedure and you dont even need to measure the side panels,
working from the 'top and front' edges you merely need to make the top and
bottom panels identical, fix the rear panel to them and whizz off any
'flange' that sticks out to the rear and bottom....



Are they worth having? Oh yes - fine for a small room or used as computer
speakers! (At least *two here* have looked for the subwoofer they don't
have
and don't need! ;-)


Not actually possible with those drivers. What you are hearing is
virtual bass, created by your ears/brain from the residual harmonics.
It can sound convincing until you turn on the actual stuff with a sub,
and all of a sudden you realise it really wasn't there.


So don't switch on a sub and you won't miss it - the sound is plenty good
enough for 'near field' use like computer sound and 'radio'....



A sort of small 'high end, cottage industry' manufacturer that renders
the
cheap, mass-produced stuff somewhat bland and uninspiring by comparison,
then....???

:-)


Yup - just as well there wasn't an original ice cream they were trying
to make it taste like, innit?


You mean their 'chocolate' flavour doesn't taste like chocolate then??

(What about 'vanilla'? What does that taste like?? :-)



Errrm. It tastes like vanilla. I think they put real vanilla in it.
The chocolate tastes like chocolate because they put real chocolate in
it.


Ah, so it's not *repro* then is it - it's an 'original' in itself...??


Now there's a thought. If we could put real musicians over there
opposite the settee, that would be real Hi Fi. I might have to shift
the pot plant to fit in a symphony orchestra, though.


Exactly! ;-)

Tell you what, put a real piano in and it don't half crush up yer hifi
gear....

Advice: Amp building
 

Keith G wrote:

So don't switch on a sub and you won't miss it - the sound is plenty
good enough for 'near field' use like computer sound and 'radio'....

Ooh, no, when I talk about feeling something from the music, I'm talking
about goolie-wobbling bass. :-)


--
Wally
www.wally.myby.co.uk
If it ain't broke, fix it until it is.

Advice: Amp building
 

"Wally" wrote in message
...
Keith G wrote:

So don't switch on a sub and you won't miss it - the sound is plenty
good enough for 'near field' use like computer sound and 'radio'....

Ooh, no, when I talk about feeling something from the music, I'm talking
about goolie-wobbling bass. :-)


:-)

It's been a while since I've had me goolies wobbled, but ya got me
thinking....

Me organ's not been up to snuff lately, mebbe I should knock up a sub to go
wiv me *stunning* new speakers which are a little croaky and a tad bass
light - anybody know a design which can at least keep up with them?

This Dual TL design looks a bit different/interesting -

http://www.visaton.com/en/6/32/879/index.html

- anybody got any observations/suggestions to make about it?

Advice: Amp building
 

On Mon, 31 Jul 2006 02:16:26 +0100, "Keith G"
wrote:


"Wally" wrote in message
...
Keith G wrote:

So don't switch on a sub and you won't miss it - the sound is plenty
good enough for 'near field' use like computer sound and 'radio'....

Ooh, no, when I talk about feeling something from the music, I'm talking
about goolie-wobbling bass. :-)


:-)

It's been a while since I've had me goolies wobbled, but ya got me
thinking....

Me organ's not been up to snuff lately, mebbe I should knock up a sub to go
wiv me *stunning* new speakers which are a little croaky and a tad bass
light - anybody know a design which can at least keep up with them?

This Dual TL design looks a bit different/interesting -

http://www.visaton.com/en/6/32/879/index.html

- anybody got any observations/suggestions to make about it?


Go for it - really good for stopping your house floating away. I built
my sub in an inaccessible cupboard under the stairs, so carpentry was
limited to the front panel which I braced with scaffolding planks.

d

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

Advice: Amp building
 

Jim Lesurf wrote:


Its an odd think Wiki, I don't think its any less accurate than most
other sources, its just its inaccuracy is obvious, where most texts as
they have no means of being changed are assumed to be fixed in stone.
Its at least as accurate as any history book, it works on the basis of
the truth being what enough people agree it is :-).


Alas, that isn't how the scientific approach works... ;-


No, but its certainly often true of the history of science, i.e. Who did
what.

--
Nick

Advice: Amp building
 

"Don Pearce" wrote in message
...
On Mon, 31 Jul 2006 02:16:26 +0100, "Keith G"
wrote:


This Dual TL design looks a bit different/interesting -

http://www.visaton.com/en/6/32/879/index.html

- anybody got any observations/suggestions to make about it?


Go for it - really good for stopping your house floating away.


No, I meant am I giving myself amplification problems?? :-)


I built
my sub in an inaccessible cupboard under the stairs, so carpentry was
limited to the front panel which I braced with scaffolding planks.


Steady on - you nearly *blogged* there!! ;-)


OK, here's a *phonetic* joke (that means people living South of the river
should say it out loud to themselves), the answer's a way down below:

Q: What do you call a pig with four eyes?







































A: A 'Peeeeeg'....

:-)

Advice: Amp building
 

On Mon, 31 Jul 2006 11:29:41 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
...
On Mon, 31 Jul 2006 02:16:26 +0100, "Keith G"
wrote:


This Dual TL design looks a bit different/interesting -

http://www.visaton.com/en/6/32/879/index.html

- anybody got any observations/suggestions to make about it?


Go for it - really good for stopping your house floating away.


No, I meant am I giving myself amplification problems?? :-)

No, there are plenty of places you can buy an amp for a subwoofer. It
is possible just to integrate it with the output from your power amp,
but you will need to design a crossover, and the chances are it won't
match the sensitivity of your current speakers.

I built
my sub in an inaccessible cupboard under the stairs, so carpentry was
limited to the front panel which I braced with scaffolding planks.


Steady on - you nearly *blogged* there!! ;-)


OK, I'll blog some more. Have a look he http://81.174.169.10

I just hauled the settee out of the way to take a piccy.


OK, here's a *phonetic* joke (that means people living South of the river
should say it out loud to themselves), the answer's a way down below:

Q: What do you call a pig with four eyes?


A: A 'Peeeeeg'....

:-)

And what do you call a deer without eyes?






























No idea.

d

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

Advice: Amp building
 

"Don Pearce" wrote in message
...
On Mon, 31 Jul 2006 11:29:41 +0100, "Keith G"
wrote:


No, I meant am I giving myself amplification problems?? :-)

No, there are plenty of places you can buy an amp for a subwoofer. It
is possible just to integrate it with the output from your power amp,
but you will need to design a crossover,


I haven't studied it at all yet, but I was thinking of a plate amp with a
variable crossover. I think the design calls for 50 Hz cutoff...??


and the chances are it won't
match the sensitivity of your current speakers.


How does that present a problem if the sub has its own amp with, presumably,
a volume control?



I built
my sub in an inaccessible cupboard under the stairs, so carpentry was
limited to the front panel which I braced with scaffolding planks.


Steady on - you nearly *blogged* there!! ;-)


OK, I'll blog some more. Have a look he http://81.174.169.10

I just hauled the settee out of the way to take a piccy.



Nice blogging!! :-)


snip loopy jokes


No idea.


OK - point taken! ;-)

Advice: Amp building
 

On Mon, 31 Jul 2006 12:11:19 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
...
On Mon, 31 Jul 2006 11:29:41 +0100, "Keith G"
wrote:


No, I meant am I giving myself amplification problems?? :-)

No, there are plenty of places you can buy an amp for a subwoofer. It
is possible just to integrate it with the output from your power amp,
but you will need to design a crossover,


I haven't studied it at all yet, but I was thinking of a plate amp with a
variable crossover. I think the design calls for 50 Hz cutoff...??


and the chances are it won't
match the sensitivity of your current speakers.


How does that present a problem if the sub has its own amp with, presumably,
a volume control?


No, I mean it is a problem when you share the main speakers' power amp
via a crossover. With a plate amp all problems vanish.



I built
my sub in an inaccessible cupboard under the stairs, so carpentry was
limited to the front panel which I braced with scaffolding planks.


Steady on - you nearly *blogged* there!! ;-)


OK, I'll blog some more. Have a look he http://81.174.169.10

I just hauled the settee out of the way to take a piccy.



Nice blogging!! :-)


d

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