In my ranger I have 3 in a 4cf box with an 8in port tuned to 32hz powered by an audiopipe 3k at 2.6ohms it plays the lows great it peaks at 34hz on the tl the best I've metered is 148.2 outlaw at 34hz and legal 144.3 at 40hz those subs are awesome for lower hz. And the way the suspension is designed its as if it's a ten.