I'm doing preliminary calculations for a starter DIY subwoofer. About how much gain can be expected from room acoustics in terms of frequency range and dB increase? My project calls for a sealed enclosure(for ease and greater margin of error), and I'm using a 10" driver. The predicted F3 is about 46Hz, F6 is about 35Hz, and the Qtc is .7, so the drop-off is very graceful. Now, would the gain from room acoustics bring up the faltering end for a more flat response? I ran some calculations using a ported enclosure for the same driver, which gives an enticing F3 of 26Hz or so. However, I've heard that a flat subwoofer ultimately sounds boomy because of room gain. So will the seal enclosure be good enough? Or should I dive in and attempt a ported enclosure?