AVS Forum Special Member
Join Date: Feb 2016
Location: Danbury, CT, USA
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I believe that the RS202D isn't intended to be run that way. When you run both sets of outputs at the same time (A+B mode), they recommend a speaker impedance of 16 ohms minimum. I can't swear that you'd damage your amp if you connected it as you plan, but it strikes me as a bad idea.
I'm no audiophile, but I'd also want some sort of crossover so that you weren't sending all frequencies to the sub. (Better yet is a crossover that sends none of the lows to the main speakers.)
If you read through the reviews at richersounds, you'll see some that paired the sub with an inexpensive amp. I'm not clear on how the others drove it.
I'm trying to think of a polite way of writing "don't be so damned cheap", but I'm failing at that.