Keith G wrote:
You use it!

I've been meaning to throw a pair of OB speakers together for a while (had
the ideal drivers kicking about for ages - Visaton B200s) and never got
round to it, but I was sent a pic of some nice OBs the other day and they
got me thinking.....

They were stood out in the middle of a room which I thought wouldn't have
been doing them any favours and it caused me to wonder what slotting a pair
into the corners of my room and *using* the 'liveliness' to boost the bass
would work like? Add to that I've been falling over a bloody great, *heavy*
piece of board (white plastic faced 18mm MDF) in my garage for a while, so I
duly threw a pair together - it took about 3.5 hours and the only scrap left
over from a piece of board 54 x 48 inches was two 48 inch lengths about 1
inch wide and the circles from the cutouts for the drivers!!

So in true Show N Tell tradition*, here's the story:

http://www.apah69.dsl.pipex.com/show/obspeakers1.JPG

http://www.apah69.dsl.pipex.com/show/obspeakers2.JPG


Miking them thus:

http://www.apah69.dsl.pipex.com/show/obspeakers3.JPG


I grabbed a couple of extracts from the 'Road To Hell' CD:

http://www.apah69.dsl.pipex.com/show...0(Extract).mp3

http://www.apah69.dsl.pipex.com/show/Daytona.mp3



And some shorter samples from a fairly weedy 'test CD' (it's French - what
do you expect?) which, I think, demonstrate superb clarity - headphones will
give you a better idea but ignore the 'heartbeat' which seems to have crept
back into the equation.....

http://www.apah69.dsl.pipex.com/show/Sample%2001.mp3

http://www.apah69.dsl.pipex.com/show/Sample%2002.mp3

http://www.apah69.dsl.pipex.com/show/Sample%2003.mp3

http://www.apah69.dsl.pipex.com/show/Sample%2004.mp3

http://www.apah69.dsl.pipex.com/show/Sample%2005.mp3

http://www.apah69.dsl.pipex.com/show/Sample%2006.mp3

http://www.apah69.dsl.pipex.com/show/Sample%2007.mp3

http://www.apah69.dsl.pipex.com/show/Sample%2008.mp3


Anyway, I was very pleasantly surprised indeed - see what you think!

(The milkman freaked out and dropped his yoghourt...!! ;-)



*It's what I do, I don't have a past lifetime's experience of 'audio' - mine
is *here and now*!!




Keith,

As one who *does* have a lifetime's experience of audio (and I'm only
now realising how little I know)there's nothing new under the (audio)
sun. Corner enclosures were very popular in the late '50s and '60s in
part for the reasons you state: i.e. using the room corners to boost the
bass, but also to keep them out of the way of furnishings. It was hard
enough for people to find room for one large 'speaker, but when stereo
came along, finding room for two was difficult. The WAF was as alive
then as now.

However, putting 'speakers in the corners won't make much difference in
a live room over putting them elsewhere. The problem with a live room is
reflections, which affect the mid and treble. Bass sees hard walls
whatever they are covered with unless you take special steps to create
bass traps. However, using single drive units, the treble will beam more
than using separate dome tweeters, and angling them as you have will at
least help keep the treble away from the walls.

I have just received a copy of the 1959 Audio Year Book and a copy of
the July 1959 American "High Fidelity" magazine and they are full of
weird and wonderful enclosures trying to make stereo acceptable
domestically.

In spite of my long teeth, what's an OB 'speaker other than Outside
Broadcast?

S.