subs model number are 15-pr124d dual voice coil, the impedance of each coil i am not sure
amp number is Kenwood KAC-929 i believe it is a 2 channel amp, and i think the minimum impedance is 4.. becuase i am reading my manual and it says the impedance of the speakers should be 2 or greater for stereo.. or 4 or greater for bridged connection