Today, I got my new speaker cabinets, an EB HD210 and an HD212. I don't have an amp yet to power them, but I do have my BXR 100 1x15 combo amp. I want to use my 2x10 w/tweeter as an extension cabinet for my 15 until I get an amp to power my cabs. On some combo's, by the "line out" jack, it says how many watts at how many ohms, but on my combo it doesn't. The speaker cabinets are both 8 ohms, but I don't know what the impedance is on the amp. Do I need to worry about plugging my speaker cabinet into my combo amp since I am not sure about the impedance, or is it ok? Is there anything else that I need to know or be careful of? Thanks a lot!