It uses a single ESS9018 chip which incorporates 8 separate DACs which can be used in 8 channel, stereo or mono modes. Yes I think it is confusing too. I want to know how many DAC chips not how many channels. Regards Macrog
The digital Interface power supply is 5 volts and 6 x 1.5 batteries in series is 9 volts (significantly over spec).
Yes battery power would be interesting to explore though. I have considered LIPOs and will certainly try them on my Audiophellio 1's when they arrive.
It is interesting to me that Audio-gd classify both the NFB-8 and NFB-7 as neutral DACs. To me the NFB-8 is in the musical catergory and the NFB-7 neutral.
The Reference 7.1 is more neutral than the Reference 7 or Reference 7HE was and is clearly more neutral than the NFB-8.
I am not attempting to quantify which DACs are better just differences in sound signature which I am hoping is OK? I have listened to all these DACs extensively on a variety of different...
Coaxial or USB are definitely better options than Toslink.
If your system was particularly harsh in the first place Toslink's often soft presentation might work for you but it would bemuch better to just have a neutral system.
It sounds like the rolled off sound of the PS1 isn't exposing weakness elsewhere in the chain. Have you replaced the capacitors on the reciever? They really need to be redone every 10 - 20 years. It is easy to make a system sound worse by improving your source as problems elsewhere are likely to be more obvious. Regards Macrog