I currently have two Obsidian Audio OA12 V2's running off of 2 Audiopipe APSM1500's strapped @ 1 ohm. I used to own a Fi BTL 12" UFO motor sub before this system but on less power. The guy that currently has my old BTL is wanting to trade straight up for my two Obsidians. I think my Obsidian setups is a bit louder than the BTL was, but I really liked the way the BTL sounded, and it's able to handle the power I'm currently running better than the OA's. I'm considering the trade, but I'm looking for other opinions on whether or not this would be a good trade or not.