I am in a much smaller room than your 20 x 30 x 8 and sit nearfield between the speakers, so I am not entirely sure if the speakers are good candidates for your larger room. A lot of it will depend on how much amplifier power you have. The speakers produce 87dB at a distance of 1 meter at 1 watt essentially, so 10 W will produce 97 dB peaks at 1 m, 100 W 107 dB peaks. The sound pressure levels fall off as the square of the distance from the speakers, so you can work this out. I would think a larger room would dilute the bass volume also, so a subwoofer would help here. Hopefully EA will respond to your inquiry soon with a more definitive answer. One thing I can say: once you hear the gorgeous midrange of these speakers you won't care about the bass. YMMV of course.