Originally Posted by notnyt
Mostly in agreement, but OP mentioned he wanted extension to 14 or 15hz. There's not going to be a horn that will adequately provide that. Mixing and matching, you still won't keep up on the bottom end, so it ends up being an exercise in futility. By the time you can keep up on the bottom end, you might as well run everything full range and then there's no real need for horns at all in this scenario. I won't argue at all that horns will be more efficient and provide more output above certain frequencies, however I personally feel they don't provide adequate output down low, especially for an HT application.
For music, it's not much of a competition. If you have the space, horns will kick ported ass since you can get away with running only 35hz and up.
When my lab15s get here, I'd build a horn if I could fit one under my bench. Unfortunately, ported box tuned to ~34hz it is in ~5cufft.
This is partly why I was suggesting a dual approach, a dual approach allows him to get the raw power of a horn in the higher frequencies with a 30-40Hz tune and he can build a ULF solution for the low end.
I disagree about the horn not providing enough low end, he has the space to make it large enough I think. Large low tuned FLHs are uncharted territory for this very reason, because no one ever has the space nor wants to take the risk. Everyone just wants to follow the leader. Have you noticed how ported subs started gaining in popularity after you switched?
Joking aside, I do think he can make a large low tuned low bass horn and a bass/mid bass horn work with a few caveats, one is getting the right design. I will be the first one to say that with poor design the FLH looses its greatness. Second, integration. If he can cross these two bridges then hes got it all in the bag.
The type of bass one likes should factor into their decision for a system in my view, you may have a mismatch of output with horns but EQ is available, at worst its extra unused headroom keeping the system especially linear in the more audible and impactful frequencies, I don't see a downside to that. You mention theres no reason to build a horn for full range, what I have been trying to explain is that for people who like horns it is more about their sound and feel, not about measured SPL.