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Wojtek wrote:

but I attached a double layer of 3'x5' cement boards (wonder board) under the suspended floor (crawl space) and it seems to help with bass a little. It's a cheap and fairly easy solution ($9 for a board) if you have an acces and helping hand.

Wojtek, interesting, can your elaborate on it? You placed under the floor (from the basement) the 3'x5' cement boards right under the speaker? How you were able to do it? Did you floor supporting beams allow you to do it? What is the distance between your cement boards and the floor? Is the floor carpeted? How much dB attention you get at 100Hz at the location of your cement boards?  When you said “seems to help with bass a little” then it is your subjective feeling (that might be due to electricity change) or it is the actual measurable change of amplitude? What the percentage of the whole rooms represent those 3'x5' space?  What LF section your and how you drive it?

It might be an interesting solution, I just need more data.

Rerurn to Romy the Cat's Site