On Thu, 28 Aug 2014 12:19:30 +0100, "David B"
wrote:

"Woody" wrote in message
...
"Johny B Good" wrote in message
...
On Wed, 27 Aug 2014 11:34:59 +0100, RJH wrote:

On 27/08/2014 11:09, Bob Latham wrote:
In article ,
Don Pearce wrote:

Or that there are much better ways to load speakers than transmission
lines.

I would be interested to hear what these are and in what way they are
better other than box size.


I suppose there's many ways to skin a cat. My preference (shaped by
price and space too) over the years has come down to sealed box or
transmission line. Wonder what Don has in mind.

From his subsequent postings, the only alternative is horn loading.
This suits short throw drive units but a 30 foot horn, even when
folded, is a rather large beast to shoehorn into the typical domestic
auditorium (living/ entertainment room) of your 'average semi'.


Well not if you put the driver and throat under the floor and just vent
the mouth - remember at those frequencies the sound has little or no
directionality.


Something like this?
http://www.royaldevice.com/useless.htm

Two things I noticed, one being an old model Thorens Turntable[1],
the other being the sub-woofer being split into left and right horns.

The first I can understand but the second I have to question in a VLF
sub-woofer (10 to 80 Hz afaicr).

[1] Yes, I realise most of the belt drive Thorens decks are old. I
meant it was even older than my 'modern' TD 125 Mk 1 :-)

It looks like an immediate predecessor to the TD125 range, I suspect
chosen to do transcription duty with 78 rpm recordings (the TD125
lacks this speed range).

I didn't spot any mention of it in any of the accompanying text. I
couldn't be bothered to google countless images of classic Thorens
record decks to try and work out which model it was. I'll leave that
as an exercise for someone else who gives more of a **** about this
sort of stuff than I do. :-)
--
J B Good