Among speaker projects I am thinking about, now that I am reitred, is a
1972 Bailey t-line system. The cabinet seems no big problem; Bailey has
all the necessary measurements in his article. Driver choices and
passive three-way crossover deisgn seem much more difficult. My budget
is not impressive, so I would like to build the crossovers myself, but
I don't know enough to design them. Any recommendations concerning
choice of drivers and crossover design are welcome!

Sven

sbring wrote:
Among speaker projects I am thinking about, now that I am reitred, is a
1972 Bailey t-line system. The cabinet seems no big problem; Bailey has
all the necessary measurements in his article. Driver choices and
passive three-way crossover deisgn seem much more difficult. My budget
is not impressive, so I would like to build the crossovers myself, but
I don't know enough to design them. Any recommendations concerning
choice of drivers and crossover design are welcome!

The Bailey used a B139 if I recall correctly.
I don't have their catalog to hand but Wilmslow Audio list a
modern equivalent (circular, not oval) so the original Bailey
cabinet should be OK. Wilmslow may also do a kit of drivers
and crossovers using this woofer, which will solve your problems.

On the other hand, passive crossovers are rather passé and expensive.
Why not get a Behringer digital gizmo with programmable crossovers
and delays?

--
Eiron

I have no spirit to play with you; your dearth of judgment renders you
tedious - Ben Jonson.

Eiron wrote:

On the other hand, passive crossovers are rather passé and expensive.
Why not get a Behringer digital gizmo with programmable crossovers
and delays?

Doesn't this entail the small matter of a pile of amplifiers, or is there a
Behringer jobbie that goes between amp and speakers?


--
Wally
www.artbywally.com
www.wally.myby.co.uk

"Eiron" wrote in message
...
sbring wrote:
Among speaker projects I am thinking about, now that I am reitred, is a
1972 Bailey t-line system. The cabinet seems no big problem; Bailey has
all the necessary measurements in his article. Driver choices and
passive three-way crossover deisgn seem much more difficult.

The Bailey used a B139 if I recall correctly.

I made two copies of the original Bailey TL somewhere between 1964 and 1967.
The recommended bass driver was the KEF B139, and the tweeter was the
Celestion HF1300. The cross-over was as in the Radford Bookshelf of the
same era which used the same drivers. Commercial versions of the speaker
were on offer a few years later from TDL (if memory serves me correctly).

[Nowadays I get more grunt from a sub-woofer...]
--
M Stewart
Milton Keynes, UK
http://www.megalith.freeserve.co.uk/oddimage.htm

I have pairs of B139, B110 and T27 (though Bailey/IMF was Celestion
1300 to Coles supertweeter) out of a transmission line. If you want
these to build the original design let me know. I'm in W.London
aeatartsandmedia~at~aol~dot~com

"Eiron" wrote in message
...
sbring wrote:
Among speaker projects I am thinking about, now that I am reitred, is a
1972 Bailey t-line system. The cabinet seems no big problem; Bailey has
all the necessary measurements in his article. Driver choices and
passive three-way crossover deisgn seem much more difficult. My budget
is not impressive, so I would like to build the crossovers myself, but
I don't know enough to design them. Any recommendations concerning
choice of drivers and crossover design are welcome!

The Bailey used a B139 if I recall correctly.
I don't have their catalog to hand but Wilmslow Audio list a
modern equivalent (circular, not oval) so the original Bailey
cabinet should be OK. Wilmslow may also do a kit of drivers
and crossovers using this woofer, which will solve your problems.


The "superb alternative" to a B139 offered by Wilmslow is the Volt B250.8



On the other hand, passive crossovers are rather passé and expensive.
Why not get a Behringer digital gizmo with programmable crossovers
and delays?


Or try summat with *no* crossover and hear *all* the
notes/instruments/words/voices for a change?

Andy Evans wrote:

I have pairs of B139, B110 and T27 (though Bailey/IMF was Celestion
1300 to Coles supertweeter) out of a transmission line. If you want
these to build the original design let me know. I'm in W.London
aeatartsandmedia~at~aol~dot~com

Who hasn't? :-)

I've also got the plans for the C. J. Rogers TL including circuit diagram
of the Cambridge Audio R50 crossover, if anyone is interested.

Many people consider a TL a waste of space and that a bass reflex box is
better.
Though a B139 needs an enormous box, 120litres or so, for a reflex,
so a TL is not so bad for it.

--
Eiron

I have no spirit to play with you; your dearth of judgment renders you
tedious - Ben Jonson.

Eiron wrote:
Why not get a Behringer digital gizmo with programmable crossovers
and delays?

Eiron

What's that?

Sven

sbring wrote:

Eiron wrote:

Why not get a Behringer digital gizmo with programmable crossovers
and delays?

Eiron


What's that?

http://www.behringer.com/DCX2496

You would need an extra 2 stereo power amps but you save 2 crossovers
and can tweak it forever.

--
Eiron

I have no spirit to play with you; your dearth of judgment renders you
tedious - Ben Jonson.

Eiron wrote:
sbring wrote:

Eiron wrote:

Why not get a Behringer digital gizmo with programmable crossovers
and delays?

Eiron


What's that?

http://www.behringer.com/DCX2496

You would need an extra 2 stereo power amps but you save 2 crossovers
and can tweak it forever.

--
Eiron
**That's not for me, but thanks for the tip anyway.

Sven