Originally Posted by Scottfox
What subs to Y'all have that let you hear (feel) frequencies below 10Hz??
I have an HSU 2.3 that is rated down to 18Hz in room. I can't imagine it putting out anything useful below 10Hz. Is it just going to force the sub into extreme excursions causing damage, or will it do something useful?
I'd doubt many people here are actually getting a perceivable 10hz and below. You're looking at massive DIY or IB subs to accomplish that. It looks cool on the waterfalls, but the vast majority of people aren't going to even notice that it's there. I'm good to about 15hz in-room, and I don't feel like I'm missing much at all.
As for your Hsu, the amp has a high pass filter that starts to steeply roll off frequencies below the tuning point. This will protect the woofer from over excursion. Incidentally, you know how the amp has a toggle depending on which tune you're using? That is what sets the high pass filter. This is also why Hsu warns to make sure that you use the correct setting depending on whether or not you're using a port plug. If you leave the filter set at a lower frequency in max output mode, you COULD damage your sub.