It's a matter of personal choice really, since implementations of this type are not about technical perfection (they can't be) & more a question of individual taste. Fostex themselves suggested a T90a with a 0.33uF - 0.68uF series capacitor, wired in the same electrical polarity, which should be a reasonable starting point for experimenting. Make sure it's as close as possible to the main unit.
I was thinking more like where to place it? It works take up space in the speaker chamber or in the horn
For something like a T90a with a mounting plate, the volume taken in the driver chamber is relatively minimal.
I have not looked at the drawings, but a tweeter that can be baffe mounted will likely fit into a space near the driver. Closer the better.
Do note that Terry Cain used to hang them off th eside (not baffle mounted ones thou).
dave
Do note that Terry Cain used to hang them off th eside (not baffle mounted ones thou).
dave
I believe the FE206EN being an 8" driver is a bit too large to integrate with a supertweeter since the dispersions won't match in the crossover region. My suggestions would be:
- Turn the speaker into a FAST setup with a smaller 2-3" FR driver crossed at ~ 500-1000 hz.
- Replace the FE206EN with a coaxial driver.
- Add a large waveguide loaded dome or compression tweeter, crossed probably at ~ 1000 - 1600 hz.
A: Kirishima because it is really hard to get bottom out FE206. He’d have to bi-amp
B: Horn is VERY specific, good luck finding one that would work
C: Same problem, you aren’t getting FE206 for the bottom.
dave
B: Horn is VERY specific, good luck finding one that would work
C: Same problem, you aren’t getting FE206 for the bottom.
dave
Technically correct, although partly assumes that the 8in nominal diameter is the basis; in practice it's smaller as the whizzer is direct-coupled to the coil. They won't match anyway but a little better than implied. As noted however, in the majority of cases when someone is adding a supertweeter to a wideband, outright refined technical performance is not usually a priority.
There is no room in the enclosures available to do that, unless you are proposing independent satellites. If that's the case, the OP might as well junk the entire speakers & start again from scratch, since if you're going to make a pair of 6ft horns for an 8in wideband, it's unlikely you're going to want to use them simply as a woofer.
I designed Kirishima & Vulcan for the specified units, not an unspecified coaxial driver, which would require a response charactertistic (as well as T/S parameters) close to the units in question for them to function properly.
There is no room available for that in the enclosures, so it would need to be an additional sub-enclosure. I suspect however that most people who build a speaker of this type don't want a regular multiway.
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An easy and cheap way to improve the treble a bit is to add a rear tweeter. It works fine with Ron Clark type curved horns when you have som distance to the rear wall. Make sure to place the tweeter in the center line off the fullrange. I have had it in A126 with Daves treated drivers with a Dayton NDF20-6
and now in FH3 with Daves A7.3 and AKAI orthydynamic tweeters. Temporary attached with blue tack pads.
Wire tweeters in phase, pad it down 4-5 dB and select a capacitor to your own personal taste.
Anders
and now in FH3 with Daves A7.3 and AKAI orthydynamic tweeters. Temporary attached with blue tack pads.
Wire tweeters in phase, pad it down 4-5 dB and select a capacitor to your own personal taste.
Anders
Attachments
The same as the ApexJr ribbon. I might still have a coupld of those for give away. Good for the purpose.
https://www.t-linespeakers.org/drivers/ribbon.html
dave
That tweeter would be better mounted in the end of a phase plug.
Is that one of the little Daytons?
dave
Is that one of the little Daytons?
dave
I have no idea what kind of tweeter it is. I just pulled a picture off the internet to illustrate the mounting style.
Some people used the Fostex FT17h as an upgrade tweeter on the Hammer Dynanics.
Some people used the Fostex FT17h as an upgrade tweeter on the Hammer Dynanics.
Audax TM025F15. The Super 12 originally ran a titanium dome unit. It was discontinued shortly after John Wyckoff died; his partner wanted to keep Hammer going, at least for a time though, so she asked Dick Olsher to help select a replacement; this was the one he came up with, and was used in the S12 kit from that point until things were finally wound down.
