My LDS 12/6 arrived yesterday and I'm very happy with the result. Same tone as the 15/6 but without the inherent "girth"; a good facsimile of the latter is easily added with EQ. The 12/6 is a bit more studio monitor-ish in sonic quality than the 15/6, and in a very good way. I'm especially liking my Tacoma Thunderchief acoustic bass guitar through the 12/6. It's a lighter, perfect compliment to the 15/6 for lower volume gigs, and adds extra umph for big (esp. outdoor) venues without PA support. Coupled together, these cabs sound like a dream. When stacked, the mid drivers are vertically aligned for optimum sound quality. Adding another 15/6 would definitely have been overkill. I'll post sound files later after I break in the 12/6 drivers.
Specifications:
15/6 - 23.5" W x 22.0" T x 18.0" D, about 45 pounds
Emminence Kappalite 3015LF and 18Sound 6ND410
Crossover @ 800 hertz; padding about -3db, L-pad on side
Black Tolex, metal grill, fixed-bar handles, 2 Speakon jacks, plastic corners
12/6 - 16.0" W x 23.5" T x 18.0" D, about 35 pounds
Emminence Kappalite 3012LF and 18Sound 6ND410
Crossover @ 800 hertz; padding about -7.5/8db, L-pad on back
Black Tolex, metal grill, fixed-bar handles, 2 Speakon jacks, tilt-stand, plastic corners