Bought one of these a few weeks ago. Tried it in a 1,5ft│ sealed enclosure first, but I decided on a vented enclosure instead. 1,8ft│ tuned at 32Hz, enormous low end, had to pull down 25-35Hz roughly 12dB with EQ. No "subsonic" highpass filter applied. I have nothing to complain about, it's pretty similar to my old Peerless XXLS. Great build quality as well. I recommend this driver in any SQ build. I can post measured T/S parameters and a FR sweep/HD graph later this week if someone's interested.