after vigorous searching, i decided on a carvin RL210T. (price had alot to do with the decision) when it came yesterday, i hooked up my hartke 3500 to it and played it outside on the deck (mom doesn't want it cranked inside)....and cranked it. of course, this was much louder. up until now, i've unly used small combos. i could feel the deck moving and the neighbors houses down came over to make me turn down the volume. but i don't know if the cab is actually putting out the 350 watts. my friend came over to check it out, but he was telling me about how Carvin cabs aren't very efficient and use alot of power and put out little volume. is this true? should i return this before the 10 day return policy runs out? and one more thing: will setting it on its' side hurt anything? i mean, not like the regular "|OO|" 2x10 but i want to set it like : |O| |O| won't hurt anything, right?