Hey guys, Relatively new to the whole amphead/speaker system setup. I have an Ampeg SVT Pro7 head with 1000W capability at 4 ohms. However, the cab I have (SVT HLF 4x10) only has an output of 500W at 4 ohms. I really like the tone, although I have issues with having to crank up my amp head to get loud enough at times and I would eventually like to try and get the whole 1000W output or close to it. I'm thinking about adding a 1x12 speaker to my rig to get some more low end, but had questions about the electrical needs. Most I have seen are about 300W, which would give me about 800W output, but is it super important that they be rated at 4ohms as well? I remember reading that my amp head is only rated at 600W at 8ohms for example. If I had a 4 ohm speaker and an 8ohm speaker, what would happen? Does it matter that I have 2 parallel speaker channels coming out of my amp head so I wouldn't have to daisy-chain the speakers? Thanks for your help guys.