I'm building two SI 18" subs in 4cu ft flat packs, for a single closed off 1500 cu ft room. Since the room is so small, the sheer excess of these subs is solely to try and get usable extension down to 10Hz and below, hopefully.
I'm trying to do this without overspending, and so I've settled on the iNuke3000 DSP for the amp. However, I've heard anecdotally that there's a roll-off somewhere below 20Hz, which makes it a bad candidate for my purposes. I looked around and found these tests:
(First graph on that page)
(lilmike's post #14; also the guy with the text table saying he didn't get a 10Hz reading)
(Post #9, showing dropoff in output as you go lower to 20 and 10Hz)
I'm really not that technically competent, however to me it's saying the roll-off isn't bad at all? But I see people who no doubt have competence in this area saying it has a roll-off. And then the fact the guy in the second link couldn't get a 10Hz reading was a bit worrying.
As a FYI, an SI 18" driver is rated for 600W RMS, and I've read at Data-Bass that they don't like going over that power. iNuke3000 and the EP4000 both put out about 2000W in 4ohm bridged config, however I'm not sure if the iNuke can sustain that for frequencies below 20Hz and 10Hz/below especially.
So, if my goal is to reach down to the single digit frequencies, is an iNuke 3000 enough? Or should I go to the EP4000 (+MiniDSP), which is apparently either flat or only down -3dB at 5Hz (I forget which one)? I am trying to save money with the iNuke, but if going with the iNuke contradicts my objective then I'll go with the EP4000.