The RSF 1000 have a built in amplifier and you would input a signal to them using the RCA jacks. However, if you get a 5.1 channel A/V receiver then just run speaker wire to these speakers and don't worry about the built in amp. For an A/V receiver, I would look at a Denon, Yamaha, or Pioneer as these brands provide good value for money. If your budget is really tight, look on eBay for a slightly used model by one of these brands.