OK....Impulse buy. Nice "home-made"? 2x10" bass cabinet. Sounds great! But afraid to daisy-chain it with a 8 ohm cab since my head is 4 ohms and I have NO idea what ohms it is. Bought at pawn shop. How in the heck can I find out how many ohms? I know chances are it is 8 ohms, but is there any way I can tell for sure? Thanks!!!