Like @CL400Peavey says Greenboy only gives out plans for the '66 as far as 2x15s go.
(I wonder if in retrospect he would have rather given away a different line of plans instead of the Fearful. None of his other designs match its performance. Its like Ford/Shelby giving away plans for their Mustang Cobra but only selling their stupid V6 mustang at the dealership.)
There are several members here who've documented builds they've done. No one has built them so who's to say which one is better?
JohnK did
this one.
It gets lots of love and even greenboy commented it might sound similar. It's performance especially at the limits will be
much different, due to the smaller port area. There is some extensive routing in this design but it's bracing seems OK.
Bogeybass f'd
this one up, but the design wasn't bad. He just cratered at a very crucial point. I really would have liked to have seen this done right. He brings up some neat ideas about cone rocking and actual cabinet volume vs damped volume.
Then there is the new BFM (herpes)
Simplexx 115, which any idiot could make into a 215. Bill doesn't generally like low tunings so there might not be much low frequency extension. If you bought the plans (I got them) it shouldn't be too difficult to modify them for tuning(i might). His bracing scheme is unmatched, there are lots of cuts other than 90°. So it isn't a simple as some others.
He also has his
Jack series, which
again doesn't have a 215 version. Yet again I think wouldn't be
too hard to cook one up. Especially if you got the Jack 212 plans with it, you could borrow ideas from each other. This design is more sensitive than all the others, owing to horn loading. But again the tuning might be too high for some. Also its sensitivity is in the midrange so it gets called "honky" sounding. Lots and lots and lots of weird cuts not at 90°. If your an OK woodworker before trying this you'll be much more skilled after. The plans do have neat jigs and stuff to help with the odd cuts.
Then there the old TL606 plans. They get brought up on TB allot and I wish they'd go away. They are designed for 3/4" plywood and braced
wrong for a speaker cabinet. Lots of commercial cabinets have used them and been successful. They don't sound bad just designed outdated construction techniques. They are suitable for a wide variety of drivers with various tuning options. If someone(me) would just do the math to convert to 1/2" and fix the bracing I'll stop hating them.
There are some other members who've done 2x15s but it's early and I'm trying to give platelets.
Goddammit I need to be building something.
