Just checking the ohms on a 4x12 cab with my ohm meter, reads 14 ohms (Crate 80s 4x12). On my bogner over-sized 2x12 cab it reads 12 ohms. Is this OK? How close to 16 ohms should I be seeing? I just read the ohms of a cable plugged into the speaker jack on the back of the each cab individually.