It'll be 50% for both music/movies. I get scared when I see words like xmax. It's way too much for me. I don't understand it.
I have to do more readings.
Anyways, I was hoping I can build a sub with a box dimension of 20"x20"x20". Is that possible? And which size of driver is appropriate for this dimension? It doesn't really have to shake the family room. As long as there is good clean/tight bass, that's good enough. And lastly, I'm on budget for the driver as well. Are there 15"chers that are around $50-$80 but is known to perform really well?
Thanks.