Hi, I am a bit clueless when it comes to these things, as my brother used to deal with it for me, but he lives somewhere else now, so I am a bit stuck. I was looknig at purchasing a REL Strata III subwoofer, but as soon as I start seeing ohms and impedance ratings I give up as I have no idea what these are. Could anyone help by telling me whether this sub would be compatible with the Denon amp I have in the theead title. My old sub just connected to the digital sub output on the amp and worked fine, until it went up in smoke. Thanks in advance.