If you build a wall correctly and CANT burp a 150+, you need to kill yourself...//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
150+ is so easy.....1 or 2 subs, lotsa lotsa power, in a high tuned box, call it a day..
I had a single 12" in a trunk, 2 sundown 1500D's and a 2 cube box tuned to 60Hz....bam 151.3..
It's all in the wall...but yes with 4 batteries, proper electrical and correctly built box, a 150+ should be pretty easy..