"Mike Gilmour" wrote in message
...

"Keith G" wrote in message
...

"Mike Gilmour" wrote in message
...

"Keith G" wrote in message
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"Stewart Pinkerton" wrote in message
...
On Mon, 4 Oct 2004 20:06:54 +0100, "Keith G"
wrote:

"Dave xxxxx" wrote in message
.co.uk...
http://www.royaldevice.com/custom3.htm


want two lol

Yep, I gotta admit it - that *is* impressive!!! :-)

Not really, as the system would have worked better as an infinite
baffle arrangement, avoiding the need for all that concrete. Nice
technobabble bull****, though.................


I trust fellow 'sportsmen' here will note that I don't take an easy
shot at this 'low bird'...... ;-)




Best easy shot is with a http://photogallery.net/sub.jpg big sub......


I've been contemplating building a sub, but not quite on this scale!!!
;-)



I remember an article in one of the UK mags some years ago, can't remember
which ... of a guy in Wales who specialised in concrete underfloor
subwoofer builds :-)


Yep, not uncommon it would seem and I was told recently that when central
heating started to become commonplace a number of 'audio buffs' converted
their chimneys into massive horn speakers...!!!???

"Keith G" wrote in message
...

"Mike Gilmour" wrote in message
...

"Keith G" wrote in message
...

"Mike Gilmour" wrote in message
...

"Keith G" wrote in message
...

"Stewart Pinkerton" wrote in message
...
On Mon, 4 Oct 2004 20:06:54 +0100, "Keith G"
wrote:

"Dave xxxxx" wrote in message
r.co.uk...
http://www.royaldevice.com/custom3.htm


want two lol

Yep, I gotta admit it - that *is* impressive!!! :-)

Not really, as the system would have worked better as an infinite
baffle arrangement, avoiding the need for all that concrete. Nice
technobabble bull****, though.................


I trust fellow 'sportsmen' here will note that I don't take an easy
shot at this 'low bird'...... ;-)




Best easy shot is with a http://photogallery.net/sub.jpg big sub......


I've been contemplating building a sub, but not quite on this scale!!!
;-)



I remember an article in one of the UK mags some years ago, can't
remember which ... of a guy in Wales who specialised in concrete
underfloor subwoofer builds :-)


Yep, not uncommon it would seem and I was told recently that when central
heating started to become commonplace a number of 'audio buffs' converted
their chimneys into massive horn speakers...!!!???



The driver/s at the chinney pot end?
Thats reminded me of one of my early DIY build speakers (full range) in
concrete pipes - sounded okay.
I thought I was daft building support towers etc. underfloor but now I feel
quite 'normal' after seeing that subwoofer build site :-)

"Mike Gilmour" wrote in message
...

"Keith G" wrote in message
...

"Mike Gilmour" wrote in message
...

"Keith G" wrote in message
...

"Mike Gilmour" wrote in message
...

"Keith G" wrote in message
...

"Stewart Pinkerton" wrote in message
...
On Mon, 4 Oct 2004 20:06:54 +0100, "Keith G"
wrote:

"Dave xxxxx" wrote in message
er.co.uk...
http://www.royaldevice.com/custom3.htm


want two lol

Yep, I gotta admit it - that *is* impressive!!! :-)

Not really, as the system would have worked better as an infinite
baffle arrangement, avoiding the need for all that concrete. Nice
technobabble bull****, though.................


I trust fellow 'sportsmen' here will note that I don't take an easy
shot at this 'low bird'...... ;-)




Best easy shot is with a http://photogallery.net/sub.jpg big sub......


I've been contemplating building a sub, but not quite on this scale!!!
;-)



I remember an article in one of the UK mags some years ago, can't
remember which ... of a guy in Wales who specialised in concrete
underfloor subwoofer builds :-)


Yep, not uncommon it would seem and I was told recently that when central
heating started to become commonplace a number of 'audio buffs' converted
their chimneys into massive horn speakers...!!!???



The driver/s at the chinney pot end?


So I gather, but this was from another Scot in whom I'm fast losing
faith.....


Thats reminded me of one of my early DIY build speakers (full range) in
concrete pipes - sounded okay.
I thought I was daft building support towers etc. underfloor but now I
feel quite 'normal' after seeing that subwoofer build site :-)


:-)

On Tue, 5 Oct 2004 13:59:19 +0100, "Keith G"
wrote:

"Mike Gilmour" wrote in message
...

"Keith G" wrote in message
...

"Mike Gilmour" wrote in message
...

I remember an article in one of the UK mags some years ago, can't
remember which ... of a guy in Wales who specialised in concrete
underfloor subwoofer builds :-)


Yep, not uncommon it would seem and I was told recently that when central
heating started to become commonplace a number of 'audio buffs' converted
their chimneys into massive horn speakers...!!!???


The driver/s at the chinney pot end?

So I gather, but this was from another Scot in whom I'm fast losing
faith.....

IIRC, the driver was at the fireplace end, the chimney being used as a
B&W style tapered transmission line, rather than a horn. But it was a
long time ago, late '60s or early '70s I think.
--

Stewart Pinkerton | Music is Art - Audio is Engineering

In message , Stewart
Pinkerton writes
IIRC, the driver was at the fireplace end, the chimney being used as a
B&W style tapered transmission line, rather than a horn. But it was a
long time ago, late '60s or early '70s I think.

Worked well with glass-fibre loft insulation stuffed up the chimney to
damp the resonances. A good location for a proper bass woofer if you
still happen to have the right chimney.

I've even got the ideal Goodmans Audiom 81 to use for it to keep it all
early-70s style! (As well as four Goodmans 301s for when I finally can
afford to buy a barn!)
--
Chris Morriss

On Tue, 5 Oct 2004 12:45:45 +0100, "Keith G"
wrote:

"Mike Gilmour" wrote in message
...

I remember an article in one of the UK mags some years ago, can't remember
which ... of a guy in Wales who specialised in concrete underfloor
subwoofer builds :-)

Yep, not uncommon it would seem and I was told recently that when central
heating started to become commonplace a number of 'audio buffs' converted
their chimneys into massive horn speakers...!!!???

IIRC, that was popularised by John Baldock in Hi-Fi News.
--

Stewart Pinkerton | Music is Art - Audio is Engineering