RaptorX,
If you've not done so already, I suggest you check out the Hum & Hiss FAQ in the Audio Theory Forum here. It may be that you have a combination of problems -- the OPPO problem with respect to your first amp PLUS an external problem revealed with your test with the Emotiva. (Thus the lower level of hiss remaining when tried with the Emotiva.)
Hiss often is due to external RF interference, and the most frequent culprit is room light dimmer switches, perhaps in an adjacent room. The FAQ may give you other suggestions as well.
--Bob
If you've not done so already, I suggest you check out the Hum & Hiss FAQ in the Audio Theory Forum here. It may be that you have a combination of problems -- the OPPO problem with respect to your first amp PLUS an external problem revealed with your test with the Emotiva. (Thus the lower level of hiss remaining when tried with the Emotiva.)
Hiss often is due to external RF interference, and the most frequent culprit is room light dimmer switches, perhaps in an adjacent room. The FAQ may give you other suggestions as well.
--Bob























