Summary: I looked high and low for a component audio receiver and finally found one! The only thing I don't like is that this gets a little hot, even at low volume. Even so, for the price I paid, I'm very satisfied. I can play my DVD-Audio and SACD's without having any problems, which is fine with me.
Summary: I bought this a few years ago and have just replaced it with a newer model with HDMI inputs. Overall the Onkyo is a good little receiver for the money but with a couple shortcomings. The lack of HDMI inputs is of course the biggest one if you want to use it for surround sound.
Summary: I had a Yamaha HTR 5250 for about three years now and it died on me. It was my first and last, I expect a receiver to last more than three years. After searching around I decided on the Onkyo. I was a little skeptic on the price and it not having a preamp out.
Summary: I bought two SR504s to setup for others who wanted good sound and convenient video switching but also didnt want to spend much. So far its working great. From my experience low end Onkyo components have incredible value and the SR504 is no exception. Very good sound for the price.
Summary: As all Onkyos, this is a good amp/receiver, and should give you good service until the"next" thing comes on the market. It does a lot. Two minor negatives though (or perhaps not so minor): it does not have HDMI input, and the speaker terminals in the back are so cramped, it will drive you bonkers,...
Summary: I bought this receiver together with the ipod dock, thinking this would be easy and the two would work well in sync. I am not a geek, but can use basic computer, blackberry, etc and make simple fixes. But this manual is the most obtuse thing I have ever tried to delve into.
Summary: This thing connects to everything I have and then some! Very impressive for Onkyo's "entry level" product. If you are new to the home theater game like I am, start here! And buy the optical audio cables from Amazon...makes this system sound sound awesome!