The Oppo 105 has 7.1 outputs and a volume control as well as independent speaker level adjustments. It also has 2 HDMI inputs, which it can process.
So it could be connected directly to your Rotel amp and viewing device, but it can't power speakers by itself. I tried this with the Oppo 103 and it ran fine for a while, but then started to exhibit low level hiss which I couldn't neutralize. It also made low level clicking noises when employing various functions. I swapped it out with my Oppo 95, which also has the 7.1 outputs but no inputs. It seemed to run my 7 channel amp fine, and it had been running an amp without issue in a 2 channel system.
So I'd do some more research, or maybe phone up Oppo directly and ask them what they would advise.
So it could be connected directly to your Rotel amp and viewing device, but it can't power speakers by itself. I tried this with the Oppo 103 and it ran fine for a while, but then started to exhibit low level hiss which I couldn't neutralize. It also made low level clicking noises when employing various functions. I swapped it out with my Oppo 95, which also has the 7.1 outputs but no inputs. It seemed to run my 7 channel amp fine, and it had been running an amp without issue in a 2 channel system.
So I'd do some more research, or maybe phone up Oppo directly and ask them what they would advise.