Wow... Received mine today, immediately installed it, and dialed the amp in (JAD900.5). Running this beauty solo in a sealed enclosure in a Chevy Avalanche, and it handles 80hz-down no problem (No i haven't pushed it hard yet, i know it's still early). I've got crappy door speakers for now, upgrades in route, and it really brings the music to life. Can't wait to hear it with my new components. A little more power and a perfectly tuned box, i bet this thing is a beast. Simple yet really nice design; nice strong push terminals; heavy magnet. No rating for durability because i've only had it for a few hours. Great for bass you hear and feel.