Here's what I did once. I had an unused computer sound system with a sub and sattelites. I unhooked the small 4 inch subwoofer from the control box and ran wires from inside the box to a set of tens which I set my TV stand on.
I bought an adapter that turns the RCA type plugs into a headphone type plug that goes to the systems control box. And I placed the sattelites here and there.
Now it's true teh computer sound system thing was designed to only push a much smaller sub, but it turned out the Ohms were right and I had enough wattage, so I put two unused systems together and had a really bassy home theatre setup.
It didn't look all that bad either.