Yamaha Htr-6030 Do I Need A Preamp With A Htr 6030 Receiver If I Want To Add An Amp And Two Floorstanding Speakers?

Do I need a preamp with a htr 6030 receiver if i want to add an amp and two floorstanding speakers? - yamaha htr-6030

Htr6030 I have a Yamaha receiver and Yamaha speakesr wine. I add two speakers for large parties or just really Crank It Up I was looking amp that about 200 to 300 watts per channel in stereo can provide. When I think something like a 900 hp Cerwin Vega Cerwin Vega ve and two 10-speaker, I need a preamp or could not have the CD for RCA output jacks on the back of the receiver? Why are so expensive stereo preamp, if you can upgrade to a better receiver in a stereo preamp costs seems.