East 10+ year member
Team New England
This depends on power... Jon Armault (HiSpls) has a very nice setup with 4 Sundown 15 hybrids in a jeep tuned to like 40+hz and only smack a 149 but he also is only running like 5k to them.yea box needs to be re designed. you should def be doing more then a 146 or 147 with 4 15s