Center speaker replacement Updated
I have replaced the two boxless bookshelf speakers I was using with a Polk Audio center speaker module. I bought the unit from a Facebook-Marketplace seller. He wanted $20. I agreed. When we met, however, I noticed the back of the unit was scruffy and scratched. He accepted $15. The unit worked as soon as I plugged it in. Model: TL 2 CEN CH black. This makes a total of six speaker units. I could use a couple of small bookshelf speakers on the ceiling. Perhaps a couple of quality computer speakers would do.