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Thanks very much for the design parameters. It was a little tricky to calculate the correct volume while integrating the port as I did to make a relatively simple enclosure. It does in fact rival much more expensive pre-built subs that are available. Scott

I built an 8W7 home subwoofer based on Dr. Mark's parameters. Works very well. Very tight sound and well controlled. I highly recommend it if you have an 8W7 laying around. I can provide dimensional data if there is any interest. I can't post a link due to my newbie status...

Hi all, I happened to stumble across this thread and wanted to say that I built these Leach 2-way speakers while the original drivers were still available. I used the alternate 4ohm/8.2ohm resistor change for the tweeter attenuator. I have really enjoyed them. They are an excellent, fine...