All volume controls add a sound . Its up to your ears as to what sounds good . Me , I have a Oppo 105 for my bluray and cable tv audio and video . I prefer a volume pot with the 105 , The 105 volume set to 100 % .
Is Pre-Amp needed
Is a preamp needed. I run my oppo 205 direct to an MC275-6 for two channel audio and it sounds good, but am wondering how much better a pre-amp would make it sound. A pre-amp seems necessary for multiple sources, but not for just one source. Would it just be an extra link in the chain or would it greatly improve the sound?