[quote author=Braggi  link=1127148932/0#0 date=1127145332]For those who've built 12" Wicked Ones: I've read several opinions concerning scaling the WO. Steve D. says build it taller but keep it at 36 by 36. One builder said he tried it this way and wound up cutting it down and putting 10s in it and now he likes it better. Sheesh.

I found some 12" drivers I like the specs on and I'd like to go for a pair of WOs for PA use. Question is: do I do what Steve recomends and just make them taller with angled baffle boards? Do I follow another suggestion and make them 40 by 40 or larger? Vas on this driver is 1.94 cu ft vs 1.87 for Steve's driver. On that alone I guess just going taller makes sense so I don't wind up with too large a cavity behind the driver.

Any comments? [/quote]

who are we to question steve? i have heard of people haveing not good experiences building a 12 incher wo, wrayza particularly, but i dont know, if you got drivers and x over and time and amp....why not try building 1 of each and let us know 'fur shizzle' what does and doesnt work? i dont understand why scaleing a desighn is so tricky, but there are many things i dont understand...many many things.but i do love loud accurate bass..i know that

[quote author=serenechaos  link=1127148932/0#2 date=1127183053]
To quote Martin King:

“When sizing the back horn geometry.. [/quote]

Yes, but... the WO isn't a back horn, not sure it's even a front horn although it has hornlike features. As many on these forums have said, the horn is too small to actually work as a bass horn, and yet, there's the bass!

I've just found some woofers with the specs I've looked for and I'm waffling about whether to get them (at $65 each) or spring for Steve's and stick with the 10" design.

And it's not that I question Steve, far from it. I'm thinking of following his advice and just going taller.

Aha! It's that last sentence, DirtDawg. That's what I wanted to hear.

The driver I'm looking at is the Celestion BX-12 pro. it's a beast.

"Each BX unit is built on a rigid cast aluminum chassis and has been designed using computer-optimized magnet structures for maximum efficiency and edge-wound ribbon-wire voice coils for improved power-handling capability. Treated paper cones with treated cloth accordion surrounds, vented pole pieces,  HUGE magnet,  superior performance are few of the many quality features of the BX series drivers.  * Power handling: 600 watts RMS * Voice coil diameter: 4" * Nominal impedance: 8 ohms * DC resistance: 5.75 ohms * Frequency response: 45-3,500 Hz * Magnet weight: 126 oz. * Fs: 45 Hz * SPL: 96 dB 1W/1m * Vas: 1.94 cu. ft. * Qms: 9.05 * Qes: .19 * Qts: .19 * Xmax: 3.25mm * Net weight: 29.4 lbs. * Dimensions: Overall Diameter: 12.4", Cutout Diameter: 10.95", Mounting Depth: 5.5"

[quote author=Braggi  link=1127148932/0#3 date=1127225000]Yes, but... the WO isn't a back horn, ...
[/quote]
Duh  :-[  
You're right, obviously so even.  
My head was still in the Imperial...
Robert  :)

Formulas? We doan neeet no sssteeenkin formulas!

Oops, you're right. That's only an eighth inch! The xmax on Steve's is .39 inches.

I'd hate to bottom out those pretty woofers. I sure like the 96 db sensitivity, though.

OK, folks. What should we put them in? Bet they'd work well in a labhorn. I don't really need 8 subwoofers though. (Labhorns are designed to work in sets of four as I understand it.)

Anyone able and willing to model the BX-12 in an Imperial?

build a 12 inch variant, rather than the celestions use beyma lx60's, they are true monsters, have a 9mm x max , low qms, qes e.t.c
got a pair of wicked ones loaded with these and they are quite good, they try and play too low, we scaled the box up two inces in height and as a mod have scaled the horn throat back down to the 10 " size.

did a free party outdoors this weekend using a lx60 loaded wicked one and martin 215 (double 15 front loaded unfolded horn) as the bass stack, witha  pari of peavey 15" and 1 tops for ease and simplicity.

it reinforced my opinion that those two boxes as a combo make and absolutely nails bass stack for everything from dub to acid techno, cranked it at the end and played some of the more mental tracks off 'go plastic' by squarepusher , there was a bit of tarp around the bass stacks in case of raing with 10" or so flapping around at the bottom under the wicked one, it was getting a 1000w and you could see every bass note in the tarp, the held 20-25hz notes were a joy to behold.

the lx60's make the wicked one a 1400w pa cab, my only reservation currently is that we angled the baffle to fit the 12's in and i dont like the possibility of uneaven pressure loading, the mk.2's are gonna be about 6 inches wider, have the same horn rate and possibly be tapered down to a 10" throat size from the mid line of the box, if ya get me?

might possibly make the backchamber a bit smaller to make the box play a little higher, seems to have about +3-6 db giain below 4-50 hz which is fine for a sub however were planning on using 2 direct radiating 12's with a horn loaded 8" and 1" comp driver mid top for a slimline 4 box 7k monster pa.

cant wait untill the mid tops are financed and constructed i assure thee it will be a nails pa.

also on a unrelated note, google orgonite, build some (its cheap and easy), put it on your speakers (just a lump on top of the cab)....observations please (seemed particuarly good on a death box)

That driver looks like it has a massive magnet! Great for preformance, but it will be a real challange fitting it into the WO
You know that you will have to tilt the baffle to fit the 12" in the box, but as you tilt it the outter rim of the magnet will hit into the side of the box.

Good Luck

your both correct it was much 'fun' getting the drivers in, but then again the real fun only starts once thats done .
Regarding the 10" throat, we got access to smaart live for some measurement, seemingly whilst crossing over on 24db butterworths at 30 and 86 hz the box was playing 125 hz very loud, admittedly this was indoors in a small room.
ive since removed the plasticine in the troat and will be taking more measurements tomorrrow,
im not ruling ot the 10" throat could work, just needs to be a more gradual transition i reackon....

someone mentoned lab horns earlier, given the choice of 4 wicked ones with decent drivers or 4 lab horns , i know what i'd be using