The Irene scene has an 8 Hz note. Getting audible response at 8 Hz requires large ported subs. Note that I said requires multiple subs, and ported. There are some excellent low tunes subs. I like HSU. That is what I own. Look at AVS Forum for information about low tuned subs. I also like Rythmik and Power Sound Audio (PSA) for low tuned subs.
I really like the Rythmik FV25 HP, and the PSA TV1812. Excellent response at 10 HZ and even better response at 12.5 HZ. Take a look at Data-bass.com for the subs that have excellent response at 10 Hz. Getting single digit response is costly. But if you want the bottom octave, its going to cost you.