I have a 2004 solo x 18 with a brand new dual one ohm spair in it.Its the older model spair and was purchased in 2006.Also i have a rare one of one earthquake amp its similair to the d3s but its 2 highly modded ones connected with beefed up caps and wires inside at .25 ohm puts out 16000 peak 10000 rms on the solo x 18 i hit on new db drag meter 150.4 best with a box that was not very big for spl.Asking 1500 for the amp and 500 for the sub im looking for 2 12" solo x