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I was assuming he meant digital out from PC via coax (RCA connectors).
I was assuming he meant digital out from PC via coax (RCA connectors).
Sorry for the confusion. I meant the stereo analog RCAs inputs, so you can input non-digital signals. The Compass and Fun had them.
On the 12.1 looks like you can replace the coaxial or optical with a BNC connector. Is that a digital or analog input? I wonder if I could somehow feed an analog signal in there if I needed to? I don't need the option often, but it's nice to have.
On the 12.1 looks like you can replace the coaxial or optical with a BNC connector. Is that a digital or analog input? I wonder if I could somehow feed an analog signal in there if I needed to? I don't need the option often, but it's nice to have.
Well I hadn't thought of that. Asking technical information from a manufacturer and expecting an answer seems like an alien idea.
But it worked! I received an answer, telling me which resistors to change, to what value, and what the result will be.
There's 8 2202 surface mount resistors in a line of 16 resistors between the dual DACs and the dual relays. 2202 is 22k 1%. Changing these with 47k resistors will lower the gain by 7dB.
Here's the line of resistors in question.
The other 8 resistors are 5.6k. They alternate, so there's 22k, 5k6, 22k, 5k6... etc.I'm guessingthe 5k6 are for the high gain and the 22k for the low gain. Edit : Just received an email confirming the 5k6 are for the high gain.
So now all I need are 8 47k resistors in 1206 package. Changing these will be quite a challenge.
...
While I had the board in hands, I studied it to confirm what I said about the line out: it's connected to the output of the amplifier. As in, there is no difference between the RCA at the back and the TRS jack at the front. There's a relay that toggles between one or the other, and that's it. I always read that "double amping" is bad, but that's exactly what one does when using the NFB-12's line out.
On the 12.1 looks like you can replace the coaxial or optical with a BNC connector. Is that a digital or analog input? I wonder if I could somehow feed an analog signal in there if I needed to? I don't need the option often, but it's nice to have.
Any other thoughts or comparisons between the O2 and NFB 12.1? I'm looking at both of these. People say the NFB is more warm and the O2 more lean? What about strength of the bass?