I built the 2.5 way version with the 2nd woofer in the middle position. Like Din04 said "you need to be handy with a saw and such" but I too think that they sound great. Be sure you know what type of speaker you are trying to build because while these speakers are high quality audiophile sound they do not put out a high spl. So if your trying to build a Rock concert level speaker Id pick a different speaker. Mine play loud enough to do hearing damage. However, "if you are playing at 10 and want to go to 11" these wont do it.