My guesstimate is that when you add in "Sandwich Cone" and "LR Magnet System" (the latter appears to be aerodynamic contouring of the magnet structure for lower air-movement noise) it's $480/ea., and shipping to the US might be what, $50?
To go in a two-way with Fountek's NeoCD3.0. Woofer rolls off at 2nd-order Linkwitz-Riley; tweeter rolls in 3rd-order Butterworth; Xover point to be 2500Hz or 3000Hz; 12-liter ported cabinet.
It's a lot of money... but, I loved the sound of the (no longer imported into the US) Danish "Peak Consult" loudspeakers, and Sonus Faber, Rockport, and Verity all at one time at least used a similar driver.
I am also tempted as a cheaper alternative SB Acoustics Satori 5-inch TeXtreme.
My current prototype has the Eton 5-312, which is a lovely driver, but, I want something even nicer.
Thanks in advance,
john
To go in a two-way with Fountek's NeoCD3.0. Woofer rolls off at 2nd-order Linkwitz-Riley; tweeter rolls in 3rd-order Butterworth; Xover point to be 2500Hz or 3000Hz; 12-liter ported cabinet.
It's a lot of money... but, I loved the sound of the (no longer imported into the US) Danish "Peak Consult" loudspeakers, and Sonus Faber, Rockport, and Verity all at one time at least used a similar driver.
I am also tempted as a cheaper alternative SB Acoustics Satori 5-inch TeXtreme.
My current prototype has the Eton 5-312, which is a lovely driver, but, I want something even nicer.
Thanks in advance,
john
Hi,
Their spl is a little lower than what the datasheets say, and you need surely some efficienty to compensate the baffle step diffraction.
Here for instance a flex-units serie with interresting sensibility https://dibirama.altervista.org/hom...52-12-06-sdkm-mid-range-6-8-ohm-240-wmax.html (btw is it not a flex-unit serie ?)
And a more classic : http://www.audioexcite.com/?page_id=2683
http://www.audioexcite.com/?page_id=34 : I think Goran not so active those days however accepts yummi coffee gift on his site if you use his designs for diy free use.
what about the Neo CD 3.5 in spite of the 3.0 ?
Their spl is a little lower than what the datasheets say, and you need surely some efficienty to compensate the baffle step diffraction.
Here for instance a flex-units serie with interresting sensibility https://dibirama.altervista.org/hom...52-12-06-sdkm-mid-range-6-8-ohm-240-wmax.html (btw is it not a flex-unit serie ?)
And a more classic : http://www.audioexcite.com/?page_id=2683
http://www.audioexcite.com/?page_id=34 : I think Goran not so active those days however accepts yummi coffee gift on his site if you use his designs for diy free use.
what about the Neo CD 3.5 in spite of the 3.0 ?
THANK YOU!
I think I just have to roll the dice and buy a FlexUnits to play with.
I am nostalgic... and I have been told that the NeoCD3.0 was "inspired" by the Decca Kelly ribbon supertweeter. Also, I might be irrational, but the 3.0 has extension to 40kHz while the 3.5 has extension to 30kHz.
The one I want to experiment in a 3-way tower design is the NeoPro5i...
ciao,
john
HI. The short answer is, "No." Not from scratch, not all by myself. I was not trained as an engineer; I have worked as a classical-music record producer.
That said, I have been an audio electronics amateur since the 1960s, and from the mid-1970s on, I was very interested in crossover design; my first tutor was Irving M. Fried. I know Fried was not really and engineer and he was very opinionated.
BY THE WAY, I have a digital copy of Irving Fried's loudspeaker-design "Bible," so if anyone wants to read it , please email me.
So what I do is very carefully read the driver data sheets (you may recall a previous thread where I told the story of my colleague Jim Tuomy and my suggesting two new parameters to add to the canonical Thiel-Small list: "Load Factor" and "Agility Factor") and research other designs and then I come up with the basic outline, such as:
"Asymmetrical 2nd-order LR woofer roll-off and 3rd-order Butterworth tweeter roll-in, crossover point 3kHz."
And Chris at Solen in Montréal uses a computer program to come up with a design, and then I review it. Example attached.
I cryogenically process the crossover and the internal wiring, twice. Meaning, I send them out to a metallurgical lab near Boston.
In addition to Jim Tuomy, who received the President's Medal at Bose, my Bests and Brightests include Winslow Burhoe, the inventor of the inverted-dome tweeter. He founded Epicure and EPI and Burhoe and Direct Acoustics, and did consulting for Energy in Canada.
Once I get the drivers and cabinets worked out, my plan is to send the design out for critiques and one hopes improvement. If I can, I'd like to have someone design a series crossover for the same drivers and cabinets. But I there is no push-button solution for that.
By the way, the former US importer for Verity loudspeakers has heard the prototype the attached crossover design is for, and he was very impressed. Whereas in all honesty, he was not much impressed by the previous design!!!
ciao,
john
I forgot to mention (I did not remember within 30 minutes) that I also discussed crossovers a lot with Dick Shahinian.
OK, yeah, well, my mentors were two of the most "Marching to the Beat of a Different Drummer" loudspeaker designers, ever.
ciao,
john
Simulation Solen did does not take any baffle step response into consideration so you could assume crossover attached to work better with cabinets closer to the front wall, though this circuit does not do justice to the drivers. Driver potential is yet to be fully utilized.
Thanks for your comments. The speakers are indeed about 12 inches from the wall behind them. My plan of operation is first to get the cabinet size and woofer right, and then go for a more refined crossover.
BTW, I also want you to know that my first round of woofer comparisons (FWIW & YMMV) are done with a small sealed damped enclosure with no tweeter and no crossover, so I can hear what the woofer is doing on its own "running wild," as shown here:
ciao,
john