The reason why is i bought a Yamaha HT in a box system for my TV to watch dvd movies. In the meantime my stereo receiver die'd and i hooked up my turntable and tape deck and they sounded terrible on it! It sounds great with digital sources but terrible with analog. Therefore i bought a new Onkyo receiver for my turntable. I have a pair of tower speakers i want to share with the HT as front speakers, and for my stereo when i want to listen to my old LP's. The Yamaha HT only has 30 Watts per ch. each front, center and rear. I probably should have started out with a good A/V DTS dolby 5.1 receiver and built a complete system around that for my analog and digital sources but my situation and finances said otherwise.