I have an old sony DavS800 subwoofer which i am hoping to use until my special order Jamo c80sub arrives.(2-4 weeks) The sony sub is 100w and rated 3ohm. I know the 805 drives down to 4ohm with over 180w per channel. Would i be able to drive the 3ohm sub adequatly with the SR805? i have no idea if its any sort of risk and any help will be appreciated Thanks.