Tru blu and I discussed that a bit in this thread . The higher price is because it is a different kind of sub: sealed instead of ported, which allows for a smaller cabinet but requires greater cost to achieve similar performance. I haven't heard an ECS-10, as I don't have a compelling reason to invest in one because my larger LFM-1 is reasonably unobtrusive in my room, so all I can tell you is that the sealed design is basically the reason for the price.