Is it possible to cover the whole spectrum, high SPL, low distortion with a 2-way?

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#661
Camplo, the 15WS600 is not quite in the same league as the 15FH500 and 2216ND, but still worth a sim. Fs is low enough, but excursion may cause issues, depending on Fb.


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#662
camplo said:
Add the Eminence KL3015CX-8 to the list of 2216nd look-a-likes. Wow this driver is pretty damn good. All modeled measurements are about identical. A little light on the BL but everything on this one looks great.
And then enters the FaitalPRO 15FH520 8Ω, same boat as last driver, slightly higher f3 (37) but even less excursion as the Jbl woofer. So two of these would be a grrrreat pair. The Eminence requires a large 10cuft box but the Faital needs only a 5.
Click to expand...

The Faital's just sound better, cleaner and more musical. Measurements or no measurements, they are just better!
 
#667
jzagaja said:
Anyone used Eminence Legend?
http://www.loudspeakerdatabase.com/Eminence/LEGEND_BP1525/Eminence_LEGEND_BP1525.pdf

Higher than typical Cms, low Mms, low Fs.
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Nice one Jacek and completely agreed on the Cms 😉

This woofer is likely to sound better than a 15PH520 at home, but a 15PR400 will probably be better than both.
A 15PH520 is a typical high quality PA woofer > good for high SPL.

I wonder if the elevated response >800Hz is intentional (part of the design), or caused by the wall mounted baffle.
It's a bass guitar driver after all.
 
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#671
haavardnk said:
I also have the same goal for a speaker as you, so I am watching this thread closely. Currently thinking about a two way with the 15PR400, HF146 and LTH142 in a 200 litre netto box tuned to 35hz, basically some kind of mixup of the Cornscala D and the Calpamos. 🙄

Currently looking at something like this:
y4mzVaD5nR3Y0Nzlxr23W3KdVUHfTgBZwyD5gPw8T66ZKgJsRW9eMNq1yxMlbJXRhfnz3tsbJ02qsDp3ICqhYE_MeLwfyhCJj2QhaI1xRjcpuWEEgON8YYjaflv1xqFD4OTngl9zXCqtITSClW93Q2iX0v-jLCXGVfUSAZ4tVwX4HKG2aPvAxyuI9VWgrlYAsn8
Click to expand...

Really nice combination of the two cabs and for a 15in. Thats probably my max wife allowed size in my case 🙂 I can do height but not width and depth.

Have you ever tried a sim with the horn chopped off and sitting on top (in free air). Usually look better for me. (or maybe the box gets too small?)
 
#674
daemonsgr said:
Really nice combination of the two cabs and for a 15in. Thats probably my max wife allowed size in my case 🙂 I can do height but not width and depth.

Have you ever tried a sim with the horn chopped off and sitting on top (in free air). Usually look better for me. (or maybe the box gets too small?)
Click to expand...

Agreed, a nice design. Somewhat similar to the Unison Research Max 2.
 
#675
phase_accurate said:
The le of 2 mh of the 16 Ohms faital has the same effect as 1 mh on an 8 Ohms driver BTW.

Regards

Charles
Click to expand...

Thats great to know....My only gripe against this driver is the 21 cuft needed for the enclosure. I think it may be best to run a woofer that extends naturally to intended voicing. I only have so many eq control points, I don't want to be wasting them on extending the bass response, twice. Once for voicing, another for room correction. What do you guys think?
 
#676
lol! Ro808 I like your style, If I ran the numbers right, the mouth cut off of the oval horn is 384hz and the throat cut off is close to the same number. Diffraction wise, its on par (horizontally) with the tractrix 350, but not so much vertically. At 29.99 bucks, I can't complain, until I design a full sized tractrix. The best design method I've seen involved using a vertical stationary mold/cutaway of half the shape(2D) to fashion a 3d mold from styro-foam disc's of appropriate sizes and then used the mold cutaway to sculpt the shape into the foam, to create a mold. They used that mold to create a horn from fiberglass.

Tractrix midrange horn (Pt I) | D a r k L a n t e r n

About genius, I think.
 
#678
camplo said:
lol! Ro808 I like your style, If I ran the numbers right, the mouth cut off of the oval horn is 384hz and the throat cut off is close to the same number. Diffraction wise, its on par (horizontally) with the tractrix 350, but not so much vertically. At 29.99 bucks, I can't complain, until I design a full sized tractrix. The best design method I've seen involved using a vertical stationary mold/cutaway of half the shape(2D) to fashion a 3d mold from styro-foam disc's of appropriate sizes and then used the mold cutaway to sculpt the shape into the foam, to create a mold. They used that mold to create a horn from fiberglass.

Tractrix midrange horn (Pt I) | D a r k L a n t e r n

About genius, I think.
Click to expand...


That's one way of doing it.


As stated earlier, I would prefer the LTH142 to a round Tractrix for a 2 way.
There's a reason why you don't see many (big) 2 ways with round Tractrix horns.

Due to 60x50 coverage, pattern flip isn't too bad > check the beamwidth.
In my view the elliptical has a number of advantages not to be ignored.
Reduced floor/ceiling bounce, better C-C spacing and probably a slightly less beamy 'nature', to name a few.
 
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#679
camplo said:
I'm trying to be as critical as possible for my woofer selection. Though I usually screen out woofers that require 283 liters for one driver. I've been using the JBL 2216nd as a reference point of max allowable excursion, since the m2 has set the bar for IMD expectations for a 2 way, which is a direct correlation to the amount of excursion, as I see it. The 15FH500 16Ω is pretty great, for a single driver cab, 10cuft enclosure. Has a low f3, excursion is right in there with the rest I consider acceptable, when forced to flat signal. Also the only 16ohm driver in the group, if you are into that kind of thing. Has one of the the best bl to mms ratio but the le is 2....

Right now I am kinda focused on the idea of frequency extension via enclosure vs eq. I like the AE15M if eq extension is an acceptable method for great accuracy. it has the lowest mms, while being able to perform the task specs (30hz@116db while remaining linear). The 15FH520 8Ω is probably the all around champ ,f3-38hz, low Le, 5cu ft per driver, it just has a lower bl to mms ratio.....which to say some, means nothing at all.
Click to expand...


The 15FH500 is probably the best of all worlds and fits your needs almost perfectly.
I would, without a doubt, prefer the 15FH500 over the TD15M.
Faital-Pro, although still a relatively young company, has established itself at the top of the (PA) market, right next to B&C.
Moreover, it has become a preferred brand for many diy folks.
 
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#680
The oval, oriented with the smallest width on the vertical axis, dispersion is wider on the vertical axis before losing directional control on the horizontal plane. So once I go below 1505hz, I loose all directivity on the vertical axis. Being that I want to cross at 630hz....its still the same with the round tractrix 350 at 13" but at least all axis make it to the 13" wavelength. I'm down with the oval tractrix, I like how it minimizes vertical dispersion within its dimensional limits yet, I'd want at least 15" on the smallest width.
A DIY oval tractrix? Sounds like work.
Elliptical tractrix is the proper term I guess.

The 15FH500 16ohm reaches ~30hz or lower depending on port tuning..... not the 8 ohm version though(58hz). It has higher mms (95g) than the AE15M (70g), but when I aim for extension to 30's without eq, no driver is under 95g that I've found.
The enclosure size is killing me but it does set up to easily run a horizontal woofer config.
H*L*W
42.5*27*32.5

Still a giant *** speaker =(
 
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