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-   -   What CD+waveguide/horn with 12" midbass? (https://www.diyaudio.com/forums/multi-way/235645-cd-waveguide-horn-12-midbass.html)

Rojoh 8th May 2013 10:30 PM

What CD+waveguide/horn with 12" midbass?
 
Story short: Have plans for a big 4-way system based on the JBL 4675C. (2226H + 2445H/2360) + 2x18PP sub/supertweet.

My main worry is the 2226H in mid-duty. I therefore bought HQ 12" midwoofers to get a benchmark. I now worry about having taken dispersionissues too lightly, and might end up with expensive spare 12" woofers. Another angle would be to consider a much smaller (physically) system with the 12" + CD/WG/Horn.

If we leave the 4765C-system out of this discussion (- alternative 15"s is an option here):

What compressiondriver (1") + waveguide/horn would be your choice? Woofer is PHL 4550, and would likely be HPed @ 80Hz to a sub-system. Active DSP for XO, EQ etc. For example: SEOS-12 + B&C DE250 seems like an option, but have noticed that W. Parham was less impressed (due to depth of WG?).

For the record: A system based on the 2360-horn is still the main plan, but I think it would be interesting to investigate a smaller scale system too (less than 6 ft/180cm high/3 ft/80 cm wide) - especially since there will be a learning by doing-period anyway. Gameplan would then be: Subs + 2,5 way 12"/1" CD WG/horn. I know: Should have bought some 10" instead. :D

Appreciate thoughts :)

Regards Johan Rosberg

Face 8th May 2013 11:08 PM

Google SEOS12 and DNA360 compression driver. I don't believe there are any builds with you particular woofer, but there's plenty of SEOS12/DNA360 owners out there, myself included.

Rojoh 8th May 2013 11:29 PM

Seos-12 have cathced my eye. A kind of aftermath to the Econowave-thing in the wake of the late (RIP) Zilch.Seems to be a good (allround) performer. Definitively on the shortlist. Not sure of the DNA360. Might prefer a slightly inferior and more expensive original (DE250).

dumptruck 9th May 2013 05:02 PM

Quote:

Originally Posted by Rojoh (https://www.diyaudio.com/forums/multi-way/235645-cd-waveguide-horn-12-midbass-post3483753.html#post3483753)
For example: SEOS-12 + B&C DE250 seems like an option, but have noticed that W. Parham was less impressed (due to depth of WG?).

Wayne is not a neutral opinion on it, since he has a directly competing product. That said, his H290C waveguide would be my choice. He has a long post about the SEOS design (you might have already read it) here (post #140).

jcx 9th May 2013 05:10 PM

Geddes Abbey? crossed to his multiple subs? - are you really going to beat the whole system level design he has put into it

he isn't a big believer in supertweeter though

Face 9th May 2013 05:33 PM

Quote:

Originally Posted by dumptruck (https://www.diyaudio.com/forums/multi-way/235645-cd-waveguide-horn-12-midbass-post3484665.html#post3484665)
Wayne is not a neutral opinion on it, since he has a directly competing product. That said, his H290C waveguide would be my choice. He has a long post about the SEOS design (you might have already read it) here (post #140).

This thread explains Wayne's opinion: 4 Pi vs DIY Sound Group's Fusion Sentinel 15"

FYI, there is also a plastic SEOS-15 in the works, it's only a few dollars more than the 12 and will allow you to cross lower if needed.

dumptruck 9th May 2013 08:31 PM

Quote:

Originally Posted by Face (https://www.diyaudio.com/forums/multi-way/235645-cd-waveguide-horn-12-midbass-post3484706.html#post3484706)
This thread explains Wayne's opinion: 4 Pi vs DIY Sound Group's Fusion Sentinel 15"

yikes... If there is something useful in all those pages of embarrassing bickering, you're gonna have to point it out to me. Page after page of people accusing some random guy of being Wayne using a fake account to criticize a DIY design is not very fun reading.

Rojoh 9th May 2013 09:02 PM

Quote:

Originally Posted by dumptruck (https://www.diyaudio.com/forums/multi-way/235645-cd-waveguide-horn-12-midbass-post3484665.html#post3484665)
Wayne is not a neutral opinion on it, since he has a directly competing product. That said, his H290C waveguide would be my choice. He has a long post about the SEOS design (you might have already read it) here (post #140).

Thanks for the link. It sometimes is difficult to find all of the interesting info and discussions even with Google.

-Johan

Rojoh 9th May 2013 09:17 PM

Quote:

Originally Posted by jcx (https://www.diyaudio.com/forums/multi-way/235645-cd-waveguide-horn-12-midbass-post3484673.html#post3484673)
Geddes Abbey? crossed to his multiple subs? - are you really going to beat the whole system level design he has put into it

he isn't a big believer in supertweeter though

Geddes Abbey is very interesting. I considered that option a while ago, but freight and taxes here i Norway made me hesitate for a while. When I was in the thinkingbox, the JBL-setup popped up at a nice price, and I thought "why not give it a try". I was also a bit fascinated by the oportunities DSP gives.

But yes, a pair of passive Abbeys would probably have given me less pain, better overall soundquality and also saved money compared to the bumpy ride I'm on now ;)

Still: I think the JBL-2360 horn is as cool as it gets, so I'll probably stick with it a bit further. The 12"/1"CD/horn is therefore more of a sideproject utilizing the electronic capabilities allready needed.

At some point I might give up, and go for a finished solution though. :)

-Johan

Rojoh 9th May 2013 09:19 PM

Quote:

Originally Posted by Face (https://www.diyaudio.com/forums/multi-way/235645-cd-waveguide-horn-12-midbass-post3484706.html#post3484706)
This thread explains Wayne's opinion: 4 Pi vs DIY Sound Group's Fusion Sentinel 15"

FYI, there is also a plastic SEOS-15 in the works, it's only a few dollars more than the 12 and will allow you to cross lower if needed.

I might try out a plastic SEOS-12. Not a big investment anyway, and it seems like owners are generally happy with them.

-Johan


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