I currently have an older 12 alpine type r 2nd gen. Does anybody think going to a soundqubed hds312 would be an upgrade as a daily driver sub or would it just be wasted money? There is also no mention of the hds312 box recommendation, and I am wondering if it would be ok in a 1.5 cube sealed OR 2 cube ported. I would be running it off of hifonics brz1200.1d at 2 ohms for 900 rms but highly doubt it since stock voltage isn't at 14.4v, so maybe closer to 700?

Edited May 16, 201411 yr by mixer

Haven't heard any of their equipment so I can't really comment on your question, but their recommended box sizes and tuning can be found here: http://www.soundqubed.com/Box-Sizes-and-Tuning-_ep_68.html

The HDS312 works great in a 2 cube net box tuned 36-38 Hz.