Originally Posted by HeffeMusic
Is there anyway I could achieve this 2.1 through my MRX 1120 without processing the sound?
Not conveniently. The main problem is that the Anthem MRX 1120 does not have multi-channel Analog Inputs. Only Stereo Analog.
Now you could feed Stereo into the 1120 and have it process that for Crossover -- thus getting Subwoofer output. But if you want to set the 1120 to *NOT* process the Stereo Analog input then the only way to get a signal for the Sub is to have the OPPO do the Crossover processing and then wire the Sub out directly to the Subwoofer. I.e., there's no way to pass that Subwoofer signal *THROUGH* the 1120.
Which means you can't use Volume control in the 1120 (because that will only get applied to the Left / Right speakers and not the Sub).
So you would have to set up an Input definition on the 1120 that uses one of the Analog Stereo Input pairs and is set to not process that. No Anthem ARC for example.
Meanwhile you would wire the Sub out of the OPPO directly to your Subwoofer, and set up the Crossover processing you want in the OPPO: Left Front / Right Front Small, Subwoofer ON, and a suitable Crossover frequency selected.
Finally you'd need to settle on a fixed Volume setting in the 1120, and use that all the time when listening this way. Actual Volume control would be done using the OPPO (Volume buttons at the top of the Remote). You would balance the Left / Right speakers and the Sub by adjusting the Volume setting in the 1120 and the Volume knob on the Sub itself -- a one time chore, but you have to remember to return the 1120 to this chosen setting when going back to listening this way. Ideally you would want to use a Volume setting in the 1120 low enough so that you get a comfortable listening level by setting Volume in the OPPO in the upper part of its range -- say between 70 and 100.
Finally you'd have to deal with how to switch setups when you want to listen any OTHER way -- i.e, with the 1120 doing its processing and producing output for the Subwoofer itself. You'd need to switch the connection to the Sub so that it is now being fed by the 1120 instead of by the OPPO.
(Do *NOT* try to just use a Y-splitter to combine the Sub output of the OPPO and the 1120 together to feed into the input of your Sub. Why? Because they are not only connected to the Sub, they are connected to EACH OTHER! So for example the Sub output of the OPPO would be pushing voltage back into the Sub output of the 1120. This is a definite no no.)