I just wondered whether you have some issues on stage, concerning the range of it is from 50Hz. I read a review where the reviewer said he couldn't almost hear any difference when he boosted his preamp 15dB in the low section (30-40Hz). He mentioned that it wasn't a real problem if you don't play heavy stuff like hardrock and metal for instance, but still you perhaps could use a 15" underneath to have the real low bottom when needed. The cab is designed with help of John Patitucci en that isn't a real metalhead, neither am I, but I am a bit curious about this. Because I don't have a lot of experience on stage with this cab and knowing that the low-mids are making the most difference in your sound (The bassdrum is going underneath, while guitars and vocals will go above the range of the bass most of the time in lighter genres. I play rock with a jazzy and funky edge myself, but also with very subtile and light songs), I wondered if it is really true you need another cab underneath or not and what your experience is in general with this cabinet. Bag End gives great tone in the end.