Well, this is from the Atomic Amplifiers web site spec sheet:
Again, I wouldn't say that you can't use it, and clearly Atomic does list "Bass/Stick" as an application source for their products. At around $800US for a powered 12" speaker with 1" tweeter/4" horn, there are a lot of bona-fide PA speakers out there that can compete.
That said, this is what I did, and why:
I got tired of lugging my full SVT Classic all tube head w/companion 8x10" cabinet. The AxeFx solved my processor/preamp dilemma (very nicely). As for the speakers, I settled on a pair of 15" coaxial speakers (Ciare), each loaded into its own lightweight cabinet (ported, made by Dr. Bass in N. Carolina - PM if you consider any business with them), and powered by a light weight Crown XLS2500 (which has a built in crossover mode: ch1= low, ch2 = highs; necessary to separately power the low and high components of the coaxial speakers - mono, no stereo in this context). This is a much more customized solution, and actually a little bit on the pricey side (almost $2000US in all), but it is very easy to move, modular (flexible), and very light weight (this was a big consideration for me). I can now do any gig I want, big or small, and my tone and setup don't need to change because of the size of venue or type of gig I'm doing. Works great for me.
I like that the coaxial speakers convey more of the typical "bass speaker/bass cabinet" feel to them, as the sound spectrum is not physically separated as with a full-range PA speaker cabinet with separate lo/mid/hi components (bass freqs are at my knees, mids at my waist, highs at my shoulders), so the sound is much more cohesive and "real" sounding in close proximity and as you move around the cabinets. I can imaging that a good coaxial 12" speaker might do just as well. The 15" coax do need a bit of EQ shaping, but no big deal and they sound very nice IMO.
I surely could have gotten a pair of active Mackie HD1531 speakers (96 lbs per cab) for the same $$$, but it would be a pain in the butt carrying those around in my compact vehicle. Again, for me personally, the ability to keep this system flexible and portable was VERY important. Otherwise, there are a lot of options out there.
I hope this helps.