after looking into the SB112, and then finding the billfitzmaurice jack design, i've decided to go the DIY route for a new experience, and hopefully as an end result, a better than "standard" cab (prey for my fingers ) i've searched over all the Jack threads i could find, as well as looked at the Eminence response charts for both woofers. I've seen lots of information regarding the 2512 as used in Jack builds, but haven't seen much of any info regarding the DeltaPro 12a. As the DeltaPro is the "default" (read: most affordable) driver to choose from in speakerhardware.com's Jack 12 kit, i find myself highly inclined to give it a go over the 2512 costing $80 more (i'm aware that the speaker is NOT the place to skimp on any such build: bare with me). basically, i'm looking for experiences with the DeltaPro 12a. Is it a formidable speaker that simply weighs more, or is there truly something to gain sonically from dropping the extra coin on the neo?