Subs for music vs Subs for HT. Big difference in what you trying to accomplish sound wise, IMHO.
I use a large woofer that is not that accurate for HT set up...and two REL T5i's for my big rig. The T5i's are very fast ( therefore they do NOT interfere with my main speakers..which is the goal) and are invisible SQ wise in the blend. What two subs do is exactly what REL states they do, which is to smooth out the response in your room. Unfortunately, setting up two subs is IME a ton more time consuming than setting up just one....but worth it in the long run.
I use a large woofer that is not that accurate for HT set up...and two REL T5i's for my big rig. The T5i's are very fast ( therefore they do NOT interfere with my main speakers..which is the goal) and are invisible SQ wise in the blend. What two subs do is exactly what REL states they do, which is to smooth out the response in your room. Unfortunately, setting up two subs is IME a ton more time consuming than setting up just one....but worth it in the long run.