Hi Digsmithd, can I suggest you try this as it wont cost anything, and it’s usually for the better, by removing the ModWright's preamp section out of the equation.
Feed the output of the Oppo 105 direct into the ModWright's HT bypass rca's (Also function as Preamp Inputs)
And then use the volume control of the Oppo's remote as your volume control, this removes a lot of unnecessary preamp electronic from the signal path.
A little more info on how it's done if your not up to it from ModWright.
"Right button is HT/BP (Home Theater Bypass – Also acts as preamp input). When this button is pressed, input display will read ‘bp’ for ‘bypass’ and volume display will read ‘--‘ This will bypass the preamp section of the Integrated Amp and feed whatever source is connected to HT/BP RCA inputs, straight to the amplifier, with NO ATTENUATION OR VOLUME CONTROL. IT IS RECOMMENDED THAT THE HT/BP INPUT ONLY BE CONNECTED TO A SEPARATE PREAMP OR A PREAMP/PROCESSOR FOR HOME THEATER USE.
· Right control knob rotates freely. Turning knob in clock-wise rotation will increase volume from mute = ‘- -‘, numerically from 01 – 99. Remote control may also be used to adjust volume. Volume level is only displayed on digital display.
· Left digital display will indicate inputs as: CD, L1, L2, L3, (P1, P2 if phono option installed), (D1, D2 if DAC option installed) and ‘bp’ when HT/BP button is depressed. In fault mode, left digitital display will read ‘00’ and right display will read ‘P5’."
Cheers George