Von Schweikert used to make 3way with fullrange as mid. They are no longer offering it. But do not let that discourage you.
https://www.dagogo.com/von-schweikert-audio-unifield-3-floorstanding-speaker-review/
https://www.dagogo.com/von-schweikert-audio-unifield-3-floorstanding-speaker-review/
I don't think you quite meant that. 😉
Yes, they did in variations for quite some time; the driver was the Fostex FX120, an interesting and relatively linear wideband that was discontinued about a decade ago.
Yes, i mean that. Both the vifa and peerless i mentioned are run completely without crossover. Just the cap for tweeter. Biamplified, there is absolutely no passive element for mid. Yes, i meant it. Some of my best sounding speakers.
https://www.diyaudio.com/community/threads/viral-projects-sort-of.351475/
https://www.diyaudio.com/community/threads/viral-projects-sort-of.351475/
Maybe no electrical XO, but it will have an acoustic one.
But very dependent on the design.
dave
So just to be clear, what you are saying is that neither the Vifa nor the Peerless midrange drive units you mentioned ever, in any circumstances, require a crossover, no matter what the baffle diffraction characteristics, no matter what the rear loading provided to them happens to be, no matter what the power-handling requirements, no matter what the dispersion requirements, no matter what the sensitivity requirements, no matter what the partnering LF and HF drive units are, and no matter what the designer might want to do with them.
Sorry, but I still don't think you quite meant that 😉 when you said
I don't doubt that they work fine as such within the context of your particular system / systems & your goals for those, but those aren't a universal situation or anything like.
You realize this is second time you are telling me i did not meant what i said.
I think i am closer to my brain to know what i meant.
I think i am closer to my brain to know what i meant.
Out of common decency yes, since I don't think for one second you could possibly believe that it is possible to simply ram one of those drive units into any old box with the square root of zero consideration for anything else whatsoever, and that it will automatically provide results perfectly attuned to the infinite number of different requirements that exist. I have more respect for you than that.
Of course, if you really are saying that you can stuff one of those into literally anything, and it will require absolultely no crossover whatsoever irrespective of requirements (which would require a new form of physics to be invented), then I apologise for misunderstanding, and simply point out that you're completely and totally wrong.
I have a technical question: would adding an inductor LPF to "complete" 1st-order XO (parallel or series) improve phase coherence, at least potentially? What are the technical considerations? Thanks.
I run into this situation a lot (not counting adding supertweeter to fullrange). A 5" mid or midwoofer from Mission without HF breakup (only later learned some classic Mission ran mid straight-through), tweeter cap at 4k. A new-fangled Chinese-brand Molisio widerange 8" flat 50-5k (useable 35-7k), tweeter cap at 6k. A 15" flat to 4k etc.
It was a nice driver. Not perfect (what is?) but a lot of what Fostex did well at the time went into that -I know some even preferred it to the more expensive F120a.
I never heard the FX120 but F120A by itself sounded fairly "dark" almost depressing 🙁 Perhaps too good and too neutral to be mid. I do still use a vintage oval alnico fullrange LPF'ed as sultry mid.
(BTW Dave did you see my MJK Area Ratio Table 1 redux? 1:R taper TL only needs R^-1/4.75 the line length, and that times (1+R)/2R the volume, to reach the same quarterwave frequency alignment as 1:1 TL. R=5 classic taper 72% line length and 43% volume.)
(BTW Dave did you see my MJK Area Ratio Table 1 redux? 1:R taper TL only needs R^-1/4.75 the line length, and that times (1+R)/2R the volume, to reach the same quarterwave frequency alignment as 1:1 TL. R=5 classic taper 72% line length and 43% volume.)
I would also say the Mark Audio 10P is a very good candidate. if you want it smaller maybe the Faital 4FE32 will be great also, but i would go for the 10P.
More a case of it didn't actually have a whole lot on the top end -as I recall, it dropped off quite quickly > ~8KHz.
Right. I immediately regretted getting the bookshelf F120A and not the floorstanding F200A with much better highs according to the chart. (2009, I had hurt my back terribly overworking in Beijing; eventually saved by a $5K German bed -- only 90cm wide.) I used the F120A straight-through stacked over a cheap Monitor Audio 2.5 (gold-anodized dome, PP cone didn't quite meet) I had carried to China, calling the combo my audio nirvana. Later I got Dave's Fonkensteen design but it took me years to complete (F120A moved up on baffle, Monitor Audio automotive 3/4" tweeter on top). Finally so many years later I idle-fished a pair of F200A (minus a small piece of aluminum faceplate). Good thing I already figured out how to notch-filter.
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Interesting description, i found they did not come alive. But maybe they needed more than 2-300 hrs break in.
dave