I know exactly what you mean. I have a pair of old 4-way cabs using the b139. I have built one new cabinet, but not yet the other.
See: http://www.diyaudio.com/forums/multi-way/163157-amw-acoustic-labs-a440-looking-info.html
Cheers
Doug
http://www.wescomponents.com/datasheets/Speakers/Daichi/HFR-HFS_RangeNP.pdf (scroll down to the end of this document for the data.)
Do you mean by painting /coating the cone? (I'm thinking about the cone treatments done by Planet 10. Would that be sufficient?)
Doug
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Physical arrangement of the original Gale GS401a drivers
Gale 401s -- failed project resurrected... - pink fish media
... has a great photo of a stripped GS401a cabinet, showing the locations of the drivers.
Doug
Gale 401s -- failed project resurrected... - pink fish media
... has a great photo of a stripped GS401a cabinet, showing the locations of the drivers.
Doug
Those midrange enclosures look just like the Fostex ones I have here, I suppose all good midrange drivers need similar size compartments to work in
it is better to have the tweeters and midrange positioned closer than the originals.
EDIT : in fact i prefer a small format tweeters like SB26STCN to make it as close as possible since the 4" mids can cross pretty high.
No. New old stock via Jaycar many years ago, Use to be used in old Australian built Plessey 3-Ways. Similar faceplate tho
Interesting thread but I think, as someone said earlier, the tweeter and midrange look much too far apart for a 5kHz crossover. I seem to recall it being said that the woofers were staggered like that in order to cancel modes or some such. Does anyone know the precise reason given? Doubt it does any harm but also a bit dubious about it doing much good.
For a moment last night I thought I'd found a very suitable tweeter for this project: The Beyma T2010 to go with the Beyma woofers and the Audax mid.
It is a soft plastic dome with a nicely controlled 80deg dispersion making a waveguide unnecessary.
However while it is still advertised as available by a number of retailers Beymas site lists it as deleted. Shame as it also had a nice brushed aluminium faceplate.
They still do the T2030 but that is a metal dome.
Btw Doug do you have a source for the metal end cheeks?
It is a soft plastic dome with a nicely controlled 80deg dispersion making a waveguide unnecessary.
However while it is still advertised as available by a number of retailers Beymas site lists it as deleted. Shame as it also had a nice brushed aluminium faceplate.
They still do the T2030 but that is a metal dome.
Btw Doug do you have a source for the metal end cheeks?
Well ... yes AND no.
IF (& only if) a set of modern drivers could be found that could utilise the dimensions of the original cabinet (or VERY near to) then you can purchase either (i) end caps from dead GS401a's; or (ii) recently manufactured replicas. Refer to the Gale forums and Google/Yahoo/etc groups for the details.
I have given some thought to identifying existing products that could be re-purposed (& don't laugh!) e.g. bright stainless steel baking dishes (roasting pans). No success there. 🙂
My most recent thoughts on the matter are to make MDF (cue the sound of ply afficionados making the sign of the cross and hanging up garlic garlands ...) end caps and to paint them - perhaps in gloss two-pack, or perhaps via something like the Spectra-Chrome* process. (*I have yet to fully investigate this, but it looks promising.) The last possibility is to make timber end caps, but to use something quite showy - perhaps a nice burl. Yes it wouldn't be chrome, but the design would still be a nod to the original. Anyway, perhaps others have further ideas. I didn't want to get bogged down in this detail at this stage, but it won't hurt to set people thinking about what might be done.
cheers
Doug
I'll just observe that if someone were determined to use old or NOS drivers, then perhaps the 4.5" Coral 5-M12 should be considered, as it came with its own enclosure.
Doug
I've seen some shallow, straight-sided stainless steel trays on a gardening site.
They are meant to be used as tiny water features in small designer city gardens.
Would've been suitable and potentially quite nice even going by the pictures but the downside was that they were £115 each!
They are meant to be used as tiny water features in small designer city gardens.
Would've been suitable and potentially quite nice even going by the pictures but the downside was that they were £115 each!
I've heard a pair of Gales with AMTs, and there is something about them that I liked.
I like the idea of the end caps. Baffle step is a surmountable but oft necessary evil so to speak (IMO) and rounded edges are helpful, probably more so on the long sides.
I would try to put the mids within the baffle enough to reduce the edge effect there.
The Wharfedale woofers would probably be worthwhile, especially as they were originally intended for two way use and have paper cones.
I like the idea of the end caps. Baffle step is a surmountable but oft necessary evil so to speak (IMO) and rounded edges are helpful, probably more so on the long sides.
I would try to put the mids within the baffle enough to reduce the edge effect there.
The Wharfedale woofers would probably be worthwhile, especially as they were originally intended for two way use and have paper cones.
Do you want a pair of Fostex /Corals?
Happy to send them to you for a trial; just pay postage
Just a little too efficient for a pair of 8's tho and will need padding down
Back a few pages you were talking about the Jaycar Response woofers were you not. As Peter Mk is always saying cut em off at the knees hard
I know there are more detailed mids out there but now that the Vifa P-13 is again available had you considered it from 300 up?
Happy to send them to you for a trial; just pay postage
Just a little too efficient for a pair of 8's tho and will need padding down
Back a few pages you were talking about the Jaycar Response woofers were you not. As Peter Mk is always saying cut em off at the knees hard
I know there are more detailed mids out there but now that the Vifa P-13 is again available had you considered it from 300 up?
Yes, I tried the 8" re/sponse with Pete's help. Agree they fall apart in the mids but fine as low compliance woofers.
I never saw those !
They remind me of some Morel speaker of 20 years ago
But...a-AH ! The Peerless midrange ! That's my first
DIY buy ! In replacement of the dead ones from my Infinity Ref. 5001
I still have the metal cups...they serve their duty for another project 😀😛
Sorry that I can't read the whole 14 pages as I'm in
😀😛😕a hurry !
This seems to be a fair analysis; the last words just put... a last word onto the project 😱
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(Well, I guess as the OP I had better step back in.)
AllenB's post was prompted by a PM from me about another thread.
I still wish to see the Force 8 idea through as originally conceived, but I can reveal that chance has handed me an opportunity for a cheap "detour". To wit, I have a pair of Wharfedale 308's with water-damaged cabs. These are a sealed 2.5-way with twin 8" woofers in a small cabinet - smaller than the Gales. The sticker on the rear of the 308's cab states the volume to be 29L, but disassembly and measurement reveals it to be actually ~25L.
AllenB's post was prompted by a PM from me about another thread.
I still wish to see the Force 8 idea through as originally conceived, but I can reveal that chance has handed me an opportunity for a cheap "detour". To wit, I have a pair of Wharfedale 308's with water-damaged cabs. These are a sealed 2.5-way with twin 8" woofers in a small cabinet - smaller than the Gales. The sticker on the rear of the 308's cab states the volume to be 29L, but disassembly and measurement reveals it to be actually ~25L.
