To the ear a 1dB increase at those levels sounds a lot louder. I'm not sure if it'll hit 150 sealed, but when/if you wall it and port it, it'll definitely be nearing that. I would like to come check it out some time. Definitely looks loud. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif How do you like the HFi series subwoofers?if it doesnt it will be super close, my old setup w/ 2 rhinos hit 147, and this setup in significantly louder