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a better 2" mid driver?

THD+N said:
The only way to tell is to buy it, test it and listen.
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Yep, and this is why when naysayers interrupt my progressive posting of one of my current experiments, ignoring/understanding the stated, incremental/unfinished/unequalized real room measurements 10 ft. away that go against their beliefs that all measurements should be made on axis, at 1 meter, or in a plane wave tube from unstated horn data from Manufacturers.
It takes away my desire to share. Rightfully prompting me to take the Fire trUCK the Incremental Truth route and let everyone else, with no skin in the game spend their own multiple kilobucks (not likely) and find their own answers. I'm done playing a game that get impatient, insulting tones, an inapplicable foreign curves. To quote Rhett butler in "Gone with the Wind:" "Frankly, my dear, I just don't give a a damn."
@THD+N can carry on from here.
 
It probably doesn’t fit your parameters for your purposes here, mostly because it is a discontinued driver, but I have a pair of Selenium D3305ti to try out some day. I know very little about these, other than they are supposed to be a good candidate for a two-way with the ability to go into the teens. I assume that would be with the right horn and crossover. If it is of interest to you adept at measuring, I could send them out to you for said purpose.

Smiley

Update: forget that, aren’t even any of these on eBay. Well, if someone wants to test it, that offer stands.
 
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Deang said:
I recommended this driver last year for the same reasons and you guys about ran me out of the thread lol.
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I think at the time, for me at least, I was using a steep slope filter on my crossover and didn't really see the need, as the D2200PH performs so remarkably well for it's price, there was no need to spend almost three times as much, which admittedly, is still not an excessive sum, comparatively. now that I've reached the point where I'm splitting hairs to find improvements, it might make better sense. I'm not about to rush out to get a pair, but my curiosity is piqued. Perhaps after I paint a few more guitars, I'll direct some of the revenue towards them.
 
THD+N said:
Alright, I can't stand it anymore... I'm looking to see what I can sell so I can buy one D4500Ph for testing. I told myself that if anything new comes into the basement, something has to depart to maintain my "space". Got plenty to sell, but they are each a labor of love.
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Im in the same boat. I have a few guitars to sell, a few more to finish for clients and a couple pro amps to get rid of and I can buy more stuff. I’m also thinking about a bass bin that’s somewhere between a Belle and LaScala in size, but with a tractrix curve for horizontal expansion, as well as a bigger tractrix horn up top, but that’s a long way off. I’ll probably pick up another pair of WG 45-50 if I get the d4500ph
 
mboxler said:
D2200ph (red) vs D4500ph (white) in 18x10 horn. No filter.

View attachment 3168664
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If I'm just going off those sweeps id probably pick the 4500 for no correction on straight passive. Definitely smoother between 1k to 4k. With DSP i guess id have to go on how they sound? Easy enough to bring 1k-2khz down a little on the 2200 but on the 4500 I would chop the whole top down flat from 450 to 4500 then bring the whole thing up a bit if it even needs it to match the woofer. Id have a tough call deciding if they were close to the same price I think.
 
Another important difference between the two drivers is the impedance curve. The D2200ph has a massive peak around 500hz...three to four times that of the D4500ph. This needs to be accounted for if using a passive crossover. The plots below detail just that. The red plot is the D2200ph with no filter. The blue plot is using a series 47uf series capacitor. Even though this would be a textbook 400hz first order high pass, the impedance curve results in a 3-4db increase in voltage at 400hz.

D2200ph vs D2200ph with 47uf.jpg
 
mboxler said:
Another important difference between the two drivers is the impedance curve. The D2200ph has a massive peak around 500hz...three to four times that of the D4500ph. This needs to be accounted for if using a passive crossover. The plots below detail just that. The red plot is the D2200ph with no filter. The blue plot is using a series 47uf series capacitor. Even though this would be a textbook 400hz first order high pass, the impedance curve results in a 3-4db increase in voltage at 400hz.

View attachment 3168693
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So. The difference is measurable, is it perceivable and if so, how would you describe it?
 
mboxler said:
The D2200ph has a massive peak around 500hz...three to four times that of the D4500ph.
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This notch filter will eliminate the resonance peak on the D2200Ph.

1712343762442.png
With Notch Filter
1712345610498.png

Without Notch Filter
1712345635339.png
 
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