Hi - I'm getting a Groove 1200 head (yay for me !) But I've found the cabs are quite expensive, so I was thinking about buying a cheap 2x12 (my dad already thinks the 1x15 combo I take to gigs is too big) and putting in speakers that'd pump out 800w at 4 ohms... How would I go about it in terms of ohms and wattage? - what speakers would I need? - does the volume half if the ohmage is halved? So I thought I'd ask the Xperts!