I'm having some doubts here... The sub I'll be designing will be used on a small room (around 15 x 12 x 10 feet). It will be paired with a couple of MartinLogan Scenarios, powered by a 125 watt per channel Adcom amp. The sub driver will be a Tempest. The MartinLogans have a woofer (they are hybrid electrostats), 8" in a sealed enclosure. I'm thinking what kind of sub would go better with them: an EBS ported enclosure, or a Q=0.577 sealed enclosure. I think the sealed enclosure will have too much roll-off in the low end, and the EBS will never sound as quick in the transients as the MartinLogans will. I could use an UltraCurve to automatically flatten the frequency response, though. Any opinions on which design would go best with the speakers? Thanks!!!