inputs.text: convenient clean bass not lot money - purchased replacehement 1 ohm subwoofer factory stereo systehem factory enclosure 99 mercury villager installation straight forward uses screw terminals convenient dual voice coil subwoofer issue dual 4 ohm not dual 2 ohm available currently running 2ohm sub instead 1ohm factory amp powers no problehem not loud previous driver sounds greatno issues impedance lack impedance information would give seller 4 5 driver purpose not driven works well sounds great not intended loud bass unless want install multiples thehem