didn't get metered, i dont think thats happening tomorrow, i think they just got tied up with work and the owner couldn't get it (he was going to get it from another shop in the city).
i have a TDX myself, just one 12", i think it sounds great, the shop owner likes it more than the W7. however, its not that efficient, those W7's in the civic are 12" and each has just a 500/1 on them, and they pound. i used to have 600watts on my TDX, but it wasn't enough, barely got the sub moving, i had to step upto 1200watts to get it going. the sub works great in both ported and sealed boxes (mine is sealed). its definately an SPL and SQ woofer.
i compared mine to the W7 in the si, while the W7 in the si sounded louder, my TDX hit lower (played a bunch of Moby songs from his Play album, those songs have lots of low bass).
its a toss up, i like both subs, the shop owner likes the TDX more, they both rock imo.