fEarful™ 12/6 & 15/6 enclosure designs - FREE! (Part II)

[coolrunner989]

wow, that thing is huge!

[dug dog]

Originally Posted by vlad335

Couldn't help myself. Wife was bitchin but I completed the FearB last night. (minus grill)

Vlad: If you're the same Vlad 335 who was building a bunch of BFM cabs not too long ago, I'm thinkin' you've got a bit of a cabinet jones! 1 day out of the hospital and you're out building cabs!

Nice lookin' cab. Congrats.

[lo-freq]

Originally Posted by vlad335

Couldn't help myself. Wife was bitchin but I completed the FearB last night. (minus grill)



Texture on cab.

NICE!!!

[davio]

What kind of tuning do you use, Vlad? (bass, not cab )

[vlad335]

Originally Posted by dug dog

Vlad: If you're the same Vlad 335 who was building a bunch of BFM cabs not too long ago, I'm thinkin' you've got a bit of a cabinet jones! 1 day out of the hospital and you're out building cabs!

Nice lookin' cab. Congrats.

yep, that's me. Yeah, I got a problem.

Absolutely love my BFM cabs. Next project I think will be compression driver horns on my Omnitops. Bill just came out with something real interesting.

[Count Bassie]

Originally Posted by MooseLumps

I'm fine, BTW











But then again, I did not have surgery
:hide:

We all have the occasional fond thought of you too, Moose...

Cab is sharp, Vlad. Neat- I'm looking forward to seeing the modular stuff, I find that very interesting. I've had no time at all for any of this unfortunately. I'm hoping to do one this summer though, after you guys do all the hard work of trailblazing!

[vlad335]

Originally Posted by lo-freq

NICE!!!

THANKS!

wow, that thing is huge!

Light as a feather though. I just weighed it using the highly scientific Bathroom Scale method and it is... 51lbs! Without grill.

[vlad335]

Originally Posted by davio

What kind of tuning do you use, Vlad? (bass, not cab )

5-string standard in the current band. I may be hooking up with a guitar player I used to gig with who loves drop tunings though.

[dug dog]

Originally Posted by vlad335

Light as a feather though. I just weighed it using the highly scientific Bathroom Scale method and it is... 51lbs! Without grill.

Sweet.
Since we've established the fact that you have a "problem", I'm wondering if you have "possession" of any testing gear.

[vlad335]

Originally Posted by dug dog

Sweet.
Since we've established the fact that you have a "problem", I'm wondering if you have "possession" of any testing gear.

Not yet unfortunately. that's coming though. Never even built a box before I wandered into Bill's forum 2 years ago.

[greenboy]

Originally Posted by greenboy

Always looking for more waveguides that will fit these fEarful projects for the HF section because I think conventional, more traditional horn geometries are largely why so many people don't like the sound of horns. Horn design has often focused on frequency response directly on-axis, but that seems to come at the expense of more natural sounding cone-like output. Since compression drivers are remarkably sensitive nowdays the design focus can now change from making more SPL (acoustic coupling), and instead more on providing even polar response, directivity control, and less distortion.

Anyway, I'm looking at this JBL waveguide which is roughly 6" x 6" as a good 90 degree x 90 degree fit for either 12/6 or 15/6:



Seen here: http://www.jblproservice.com/pdf/Hor...rts%20List.pdf

PART NUMBER 364914-001

I just called JBL and ordered this puppy after studying the polars and FR charts for products it is part of. If you want wide, natural dispersion this is WAY too cheap. It'll be going into my fEarful Headcase (would fit 12/6 or 15/6 as well) along with a good compression driver and a 3.5KHz crossover.

Now I have to find a compression driver as good as the 18 Sound HD125, with screw-on mounting if possible.

[flight120]

Ok, so I just read parts I & II of this beast (took me the last three days off and on - DANG) and I'm definately excited about what you guys have done so far. I just wanted to say thanks to everyone who has put so much effort into this, especially greenboy! Man, you've done all of this work and haven't even gotten to enjoy all of your own designs in their finished form yet. Great job guys!

Tommy

[himppe]

Greg, have you been able to get drivers for your cabinets already?

I've asked webstore Thomann for several times when 3012LF will be available. Their recent answer was that they can make a special order just for me but the price for the driver would be 185€. That's just ridiculous because in the same store 3015LF costs 129€ and it's available right away.

With announced prices I'm able to purchase 3015LF + 6ND410 at almost the same cost as 3012LF + Alpha 6A. Plywood is sold in whole sheets so cabinet costs are practically the same between 15/6 and 12/6. So if one is able to get 15/6 at the same price as 12/6, it shouldn't be a tough choice between those two, shouldn't it?

Has anyone worked out a passive crossover for either 15/6 or 12/6?

[alexclaber]

If you can handle the extra size/weight of the 15/6 (it really isn't that much more) it will pummel the 12/6 into the ground in terms of sheer output (and thus will exhibit lower distortion at equal SPL). Much more sensitive and can handle more power.

Alex

[GregBlach]

himppe > Still no luck with the Eminence 3012LF's. I have had similar offers to yours from other European shops, but that was at around €200 so looks like Thomann is marginally cheaper at the moment. I have seen Thomanns price for the 3015LF, and there have been several times where I wished I had built the 15/6 instead, had I known there would be such a long wait for the 3012.

Thing is, I like the more compact size of the 12/6, and I'm building two anyways, so...

Looks like a fellow TB'er is helping me out with the 6ND410 though. More info to come.

Another thing I can't get in Denmark is the front grille. So I went down to the local blacksmith shop and had a look around. I found some grille material I liked, took it home, and started cutting with my plate shears:



I guess I'll see how that turns out later.

[Count Bassie]

Cool grille- I like the quasi-industrial-by-product integration of materials! Just like the 50's, when the electric bass was born in Leo's garage!

We may be moving our household at some point soon, and it might involve me not being able to haul along my SWR 8x8 and hefty power-preamp rig. I might need to sell it all for something more modular.

Now I really like my 8x8 cab- it's punchy and sounds really nice, and I'll miss it if it goes- but I will build a 15/6 *asap* in this case, probably with that JBL driver and no tweet- if I have that JBL thing right.

So the question: Will the 15/6 make me forget the 8x8 and all it's wonderful punchiness, with the added benefit of making me glad it weighs less than half the poundage?...

(...Will Valerie return home and be successfully de-programmed from the cult's evil ways? Will Jamie survive his surgery? Will Ringo be free of Kylie's ring? Will the in-laws move out and go on that 7-week cruise to Alsaka?...)

I realize this is not a totally objective question- but this is taken into consideration. Just a gut response will do. I'm staying tuned...

[GregBlach]

So you like it, eh...

Well, I did a "quick install" of the grilles, just to get an idea of how it might look. I was thinking of painting them black, but now I'm pretty sure I'll leave them as they are. Looks kinda good to me:

[Count Bassie]

Hmmm. Spray 'em with Chrome Rustoleum!

[greenboy]

Good open pattern, Greg. I got my extruded diamond-pattern from welding shops, cut from a huge sheet into a manageable one that I could get into a car. Further cutting can also be done with a cutting wheel on a handheld grinder.

* * *

Hope you get those drivers soon though - hearing these will really get you stoked. Was doing some web research yesterday and ran into a home audio post that talked a lot about acclimatizing to any new loudspeakers - how ultimately the poster's new speakers sounded much nicer than their old ones, but at first he had trouble with the entirely different way they presented the spectrum and almost as if his hearing was out of wack. But after weeks of listening, his preference had shifted so radically the old speakers were no longer pleasurable.

Part of that early bit might have been attributable to driver break-in which takes awhile with some drivers, but I think we can get habituated to a certain sonic profile, and even though we might find fault with it, it's familiar and we've learned to work with it.

Tying that into a post about the three-way Carvin LS1503 yesterday where the poster remarked about how well those cabs displayed any EQ changes, I think it's nice to have a dedicated small-format midrange driver for several reasons, and one is that even subtle EQ changes are revealed better when off-axis response is better further up into the spectrum.

[MooseLumps]

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