ya'll might see this as a lame question, but I've owned and used combo amps throughout my life and just made a trade for a hartke 2000. need this question answered by tomorrow afternoon. can I use a 4 ohm 1X12 PA cabinet with the head for a low volume gig? it will save me from lugging the 4X10s and would make things a real lot easier. I don't understand the whole ohms thing, 8 ohms, 4 ohms, what you can use with what and what not and watts....... . please answer my first question and if ya can explain a little that would be cool too. thanks.