IDMAX12v3 dual 4 ohm. wired in parallel,bridged to a 1000 watt RMS US amp. 1.7 cubic ft sealed box. First impressions..........****...This subs sound quality is unbelievable,but make no mistake,its gets loud too. .i removed a RL-P and installed the MAX. Can tell this sub is more efficient.Had to turn the gain on the amp down.Im allowing some break in time,cant wait to hear it turned up. This sub goes LOW,extension is amazing,bass drums sound like bass drums,not just a "thud". I reccomend this sub HIGHLY to anyone that loves clarity,LOWS,and some loud bass.Next it goes in the ported box 2.0 cubes tuned to 28hz BUY one now!!!!