I'm sure people post questions like these all the time, but I can't seem to find the answers I need!! I have an Ampeg SVT Classic that has a setting for either 4 or 2 ohms. My cabinet is an Ampeg PR-410HLF rated at 4 ohms. I currently have the ohm setting on my Ampeg set to 4 ohms while playing through my 4 ohm cabinet... is this the correct way to do it? Also, I'm thinking of getting an Ampeg PR 2x10H, but this is rated at 8 ohms... is this a wise combination with a 4 ohm cab? I've been told two different things: would this total 6 ohms??? or 2.6??? I don't get it!!! Either way, would this combo of an 8 and a 4 ohm cabinet be a good idea? I really don't want to push my SVT too hard. ...and how does this work: let's say i have an 8 ohm head and I run it into a 4 ohm cabinet... is this good or bad? Should the ohms on the amp be lower or greater or the same as the ohms on the cabinet? Thanks!! P.S. If it IS a good idea and you are or know of someone with an AMpeg PR-210H gimme a ring!!