i use them in a onkin type of enclosre. I get good bass from the beginning but hard to turn it up loud. When I added the jinsanity life cables + custom balanced power, the dca sounded fuller. Sometimes it even sounds like there's a sub inside. I don't need to turn it up loud anymore to get lots of bass.custom balanced power unit - www.custom-ht.com
the unit I had built is mentioned here:
http://www.curtpalme.com/forum/viewtopic.php?t=5403&sid=9dc4da145d3b58c6ff507f23f4d70c31