oppo's volume control


Any Oppo owners out there who have tried routing them directly to a power amp using their volume controls instead of a separate preamp or integrated? Would like to know how that has worked for those who have tried it.
anjowin
George I'm not following you the Osiris is an integrated amp that uses a passive pre-it also has a direct input to allow the Osiris to be used in say a home hi-fi set up. I've maybe not explained it correctly.

As I understand it, there is not bit stripping on the 105 DAC's.

For whatever reason when I go direct into the Osiris with the Oppo the sound is noticeably poorer-it doesn't sound transparent at all quite the opposite.

06-01-14: Ben_campbell
But going direct from the Oppo into the direct option on the Osiris even with attenuators you can not even get close to 75-so possibly that has had an impact on the noticeably inferior sound I hear.

Hi Ben, what I was responding too mainly was more to the quote you made above.
That you couldn't get close to 75% of full output, even with (I take it, plug in attenuators such as the "Rothwell" ones) which can sometimes give bad impedance matching between source and amps, and under this 75% of full volume "bit stripping" can become an issue with many digital domain VC's.

Cheers George
Hi, in my case I am using the Oppo with an integrated amp. My speakers are fairly efficient and my amp is rated at 150wpc.   I found that if I set the Oppo's volume at variable : 85 it allows me to have the volume knob on my amp at 10-11 oclock allowing more headroom as opposed to having the Oppo at a fixed volume 100 where I don't have much manoeuvrability from the volume knob. This brings me to my question.  Does this have an impact sonically on the sound? If I understand correctly , below 75 that is where a loss of sonic quality can be heard?   
I have the following set up.
Oppo Sonica DAC directly connected to Parasound A21 with variable or Oppo with fixed volume connected to Sony TA-A1ES integrated. The Sony integrated sounds much better than A21 directly from Oppo. I am saving up to buy a good pre-amp to pair with A21, so I can move Sony to bedroom system.