Okay. Do to a poorly worded title I think I did not get the help I was looking for. I have searched for things but I have questions yet. I picked up a Peavey MarkIV on the 'bay. It is 320 into 2 ohms, 225 into 4 ohms, and 130 into 8. The manual states that the best amp performance will come from using 2 to 4 ohm impedance. First Question: What does this mean? If I purchase 8 ohm 4x10 will I hurt it or the head. At this time I will not have the dinero to get two 8 ohm cabs. Will it be that much better to find a 4 ohm cab? Second Question: The Peavy IV has Biamping capabilties. Will this allow me to run my Ampeg ba115hp partially powered by the Peavy or visa versa. I really want to be pushing sound through both the Peavy and the Ampeg. What is the best / safest / easiest way to do this. Thanks.