Join Date: Feb 2006
Location: Vancouver, Canada
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I'm not sure what all the fuss is about in this thread. The Yamaha A-S500 is a 2.1 channel integrated amplifier. The OP merely needs to add a powered sub, connected with a conventional sub cable to the sub out port on the amplifier.
The amplifier's sub out port attenuates frequencies above 90 hz. It does not appear to be adjustable to another frequency. But not too bad a match for his Paradigm Mini Monitors (75 hz to 22 khz).
Very likely he would want to set the subwoofer to not attenuate any higher level frequencies. Just allow it to play whatever get sent to it. Pretty much a typical home theater setup – just 2.1 rather than 5.1 or 7.1
So borrow a powered sub from a friend, hook up up and see if you enjoy the sound. If so, then budget for a modest subwoofer, maybe the Paradigm PDR80 would nicely match his current speakers.