I am looking for a new head to use with my Peavey Tour 210 and was looking into older Peavey heads. Would a Peavey Mark IV work well with this cab? I am also looking to get a 115 later on. I am a bit noobish at this. Can a 4 ohm head be connected to an 8 ohm cab? Right now I have a Crate Power Block with both 4 and 8 ohm outputs. When I use the 4 ohm output, the sound is really bad and the cab shuts off. Thanks for the help!