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Old 12th January 2013, 08:35 PM   #21
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Yes, the JBL's (people never get satisfied, with a bad alignment) are very tricky. No lower extension. If you are prepared to accept that and work that out (like w. new subs). I don't see a problem. In a HT a modern receiver/mic does the dirty work. Wayne P. also uses 2 subs, from what I can tell, but I don't know if they are powered... probably. The electronic crossover is for the mids-highs I suppose.
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Old 12th January 2013, 09:44 PM   #22
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Thank you for the answer! You are helping me a lot, Inductor!

As I live in an apartment that is not too big, I don't want subs right now.
My setup is 2 'fullrange' main speakers. Nothing more.
The electronic cross-over and 3 amps (now 2 amps) are for the high, mid and low in 1 enclosure.

As I replaced the JBL bullet and EV midrange with the b&c de250, I just use 2 amps now: one for the de250, one for the delta 15lfa. The drivers are situated both in the same enclosure, no extra subs.

Which driver will give me the largest frequency range for a simple 2-way speaker without subs(thinking about the lower frequencies): the JBL 2226H, or the deltalite 2512 II ?
The volume of the enclosure can be 114L or less (wich my wife would prefer: taller boxes, same height).

Could you calculate that for me please?

Thank you very much!
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Old 13th January 2013, 12:01 AM   #23
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Let's say as a simulation, you have a (15") JBL 2226H in a max.vol. of 114 L BR(you don't because it's best in a BR=83L w. higher F3) tunned to 40 Hz.
F3=46Hz, F6=38Hz, F12=30Hz, F24=21Hz.
Now the (12") EMINENCE DELTALITE-II 2512 in a BR=114 L, FB = 29 Hz.
F3=43Hz, F6=32Hz, F12=23Hz, F24=15Hz.
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Old 13th January 2013, 09:57 AM   #24
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Thank you for the simulation.
So a smaller enclosure (83L) gives a better roloff with the JBL 2226H en should sound better, no? That is no problem. I can make the cabinets smaller. I just can't make them larger.

I did some research how to calculate this and found the program WinISD. With a 83L enclosure and the JBL 2226H, the roloff seems smoother indeed. I found:
F3=64Hz, F6=46hz, F12= 33hz, F24=21hz

Is this right? Or didn't I do it the right way? (I am very new to that )

So, for the deltalite 2512 in a even smaller enclosure, (dimensions that fit in my furniture: 36cm width, 36 cm depth, 65,8cm height with 18mm MDF) = 67,4L (or 2,38 cubic feet).

Tuned at 40hz, simulation gives me for the deltalite 2512 in smaller enclosure:
F3=63hz, F6=49hz, F12=34hz, F24=20hz

In other words, the deltalite gives me a very similar roloff in a smaller enclosure (67,4L), compared with the JBL 2226H in a larger enclosure (83L). Or did I make a mistake?

I attached 3 curves:

- JBL 2226H in a 83L enclosure
Click the image to open in full size.


- deltalite 2512 in a 67,4L enclosure
Click the image to open in full size.


- comparision of both:
Click the image to open in full size.

Last edited by vandevoordekoen; 13th January 2013 at 10:03 AM.
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Old 14th January 2013, 05:37 PM   #25
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Okay!
I went for the JBL's. If I wouldn't be happy with them, it will be no problem selling them for the price I can get them. But I doubt that

Next problem to solve: the horn.

2 options right now:

- two second hand SEOS-15 horns
- maybe 2 eminence H290 horns from a little company in Belgium.

If I go '4pi', the SEOS-15 are no option because of the dimension of the SEOS-15 (the rectangular port next to the horn wouldn't be possibble)

Anybody has another option (good horn for the de250), will be crossed with the JBL 2226H at 1khz or 1.6khz...

Thanks in advance!

Hmm, can't wait starting to build the cabinets! But first things first: I need a horn.
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Old 14th January 2013, 05:49 PM   #26
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Quote:
Originally Posted by vandevoordekoen View Post

2 options right now:

- two second hand SEOS-15 horns
- maybe 2 eminence H290 horns from a little company in Belgium.
SEOS...
Go to page 85
Matching directivity in the vertical and the horizontal planes

Last edited by Inductor; 14th January 2013 at 05:52 PM.
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Old 14th January 2013, 06:36 PM   #27
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Quote:
Originally Posted by vandevoordekoen View Post
If I go '4pi', the SEOS-15 are no option because of the dimension of the SEOS-15 (the rectangular port next to the horn wouldn't be possibble)
You can just move the port, but that's irrelevant because the 4pi crossover isn't likely to work right with the SEOS in phase alignment, if not also on-axis frequency response.

Have you asked Wayne at pispeakers for a price shipping his H290c to you? It's a bit better than the original H290. There's also this QSC QSC PL-000446GP Replacement Waveguide Horn for HPR152i 245-625 but it is pretty overpriced ordered that way (and you have to special-request mail shipping to get them shipped out of the US without paying a fortune). If you have a pro audio place nearby, though, you could see if they can get you a pair of them for a better price. I'd rather have the H290c if prices were the same, though. SEOS is good too, of course.

Last edited by dumptruck; 14th January 2013 at 06:38 PM.
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Old 14th January 2013, 06:59 PM   #28
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Wayne only ships complete kits or crossovers, when you resource the drivers, not parts of kits.
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Old 14th January 2013, 07:25 PM   #29
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Quote:
Originally Posted by Inductor View Post
Wayne only ships complete kits or crossovers, when you resource the drivers, not parts of kits.
I don't think that's true
Pi Parts and Options
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Old 14th January 2013, 08:08 PM   #30
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I asked Wayne Parham for the horns, but the shipping costs to Belgium (Europe) are almost as high as the price for the horns and delivery would be in a month...

As I would really like to start building, I was looking around for other solutions. So, every solution is welcome!

PS, he sells indeed the parts apart.
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