JL Audio 13W7 Subwoofer in Stainless Steel Tube

This is my older subwoofer made by my self! Made in 1.5 mm hi polished stainless steel (looks like chrome)and it plays over 146.4dB @ 52hz! But in this video you can't hear how loud it is, the camera does not catch that. more info www.pipesub.com