ZEnclosures Upfire box vs Rear Fire
 

I'm looking to install a single JL W3v3 12" subwoofer into my Z, and I was wondering from anyone that has firsthand experience. I would imagine the subwoofer boxes block some rearward visibility, and I was wondering which one was better for rearward visibility. On the ZEnclosures website, it seems the upfire is better, but I can't really tell with the picture angles they give.

Also, which one produces the best bass response, in terms of sound level and quality?

Atleast 4 threads on these very questions already. Not going to take the time to search for them for you:

rear fire better for SQ

zenclosures do not block rear visibility