Originally posted by azmi222
Additionally you will cut the life of your amp if you run it at two ohms. A decrease in impedence causes an increase in current draw and therefore creates more heat. If you have a high quality amp and must run the fifth channel in 2 ohm buy what is called a "Dual Voice Coil" or DVC sub and run the channels in parallel. :naughty:
I think what you wanted to say was to get a dual 4 ohm coil sub and run the coils in parallel (not the channels on the amp...if it's a 5th channel, there's no channels - plural - to run in parallel).
Also, the amp doesn't care what cofiguration the sub is or how many subs there are - the only thing it sees is a resistance, and adapts accordingly.