The 16 ohm speakers were gone when I got my Little Joe cabinet, so I loaded it with 4 x 12's that I had laying around that were 8 ohm speakers. I wired the cabinet in series/parallel combination that gives 8 ohms total (no way to get 4 ohms total with these speakers). I know the 250-4 power amp is set up for a 4 ohm load, is there any problem running these at 8 ohm, other than less power output? Does an 8 ohm load put any additional stress on the amp?