It appears that you are looking for volume reduction only from a single source to your amps. There are a couple of potential downsides to using digital domain volume reduction from the oppo. In addition to loss of resolution as mentioned above, you need to consider if your source can drive the amp. This means you will need to consider the input impedance of your amps -- the higher the better, usually, if you are above 40 kOhms you will be ok, and the output impedance of the oppo-- at least a 10:1 ratio is desirable, so lower than 4 kOhms if the amp is 40.
TVC passives are good choices, and tend to be pretty good with driving amps properly. Check out Sam Telligs review of the Promitheus Ref in this months stereophile. I used that TVC for years and really liked it, then replaced it with the even better Promitheus Signature. Both of these are great values and dead quiet of course.
TVC passives are good choices, and tend to be pretty good with driving amps properly. Check out Sam Telligs review of the Promitheus Ref in this months stereophile. I used that TVC for years and really liked it, then replaced it with the even better Promitheus Signature. Both of these are great values and dead quiet of course.