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ROMMAN wrote: I am not a professional sound guy. This weekend, I started building two CUBO 15s. Today at about 10:25pm, I finally was about to test one inside my house and wow, I am very impressed. Did not think this design would have so much power. I am very impressed with this very nice design. I give it a 10 out of 10. Thank you.P.S. This speaker box was my first that I ever built, but I am so impressed. I really recommend this design. Very simple and fun to build.