I have 2 sa-10 dual 2 ohm subs running at .5 ohm on a saz-1500d ... Box is in my trunk of a 99' bonneville with subs facing back and port firing through fold down armrest in middle of back seat. Box is 2.5 cuft tuned to 42Hz. Doing a 139.7 on the windshield with a TL. Here's a flex video of one of my subs... Just a little flex!! Lol