does anyone know if a single sundown audio sa-10 would sound good in a box tune at 45hz ?

That's pretty high tuning, it is it for SPL or daily purposes? 

daily purposes . i would like to get the most spl out of my sub for daily driving so i figure 45hz would be good but i figure i ask on here first.

Edited April 18, 201411 yr by john k

That tuning is pretty high, and won't have authority on playing low bass notes... Most people will reccomend 32-34 hz

Daily SPL, at MOST I would go is 38hz, but I would be happy at 35.
I perfer tuning at 33hz, but if you want more SPL, I would tune around 35-38, dont go to high

A tuning like that would be good for rock and general electronic music. But for anything else would fall pretty short on the low end. Typically I would suggest tuning around 35Hz to get the most out of music.

I would say stick around the 32-35 range for daily use.  If you are running any type of EQ you can tweek it a lil more but I wouldn't want to limit the sub by tuning in mid 40's