Hi! I have been recently thinking about buying myself my first head and cab. I'm going to use it in more stoner/sludge rock music, so I have been been looking at some Ampeg stuff. I have read about the impedance but I still don't understand one thing. The Ampeg PF500 is 500W @ 4 ohms and both the PF115HE and PF210HE are 450W RMS power handling @ 8 ohms. Wouldn't they be damaged if connected parallel? If my output is 500W and single cab is 450W doesn't it force me to use less volume than my head is being able to provide? I've been also thinking about the bigger cabs from these series, but I'm not sure if it's worth spending the money to connect to only 500W amp. Lastly - do you think it's a good combination to buy for start? Any better alternatives?