After some time using the Digital Interface-DSP w. Tenor 8802L feeding the NFB-7 (ver.1), Kingwa gave me an opportunity to upgrade the NFB-7 to a NFB-7.32.
The upgrade was in fact a new motherboard with two new inputs for I2S included. It is known that I2S and ES9018 isn't best friends but Kingwa has succeeded in finding and developing a working setup for USB input here. It is the new USB32-board with ultra low jitter wich seems to pair very well with the ES9018.
After exchanging the motherboards and backplates the work was pretty straight forward. I had a bad connection on a solder which caused some investigation with a rised level on acss on one channel. But after that "small adventure" was sorted everything is working as it should and now the NFB-7.32 is singing beautifully when burning in.
I ordered with TCXO's and I think that is my advice to others. TCXO's will propably repay You in the sound later.
The sound is stunning clear already but needs some time to mature more. I love the ES9018 sound because of its ability to produce crisp clear sound..And with USB32 fed in asynchronous mode with high resolution material it is fantastic already, but as said earlier it will be much better with aging by "adding more flesh to the bones"
This upgrade is recommended to semi-skilled people with some experience of working with electronics.
Edited by JaMo - 12/10/12 at 4:46am