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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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PostPosted: 17 Oct 2019, 18:40 
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Joined: 06 Jun 2008, 18:23
Posts: 5328
Location: Australia
I bought a Sony 700 4K player which had HDMI audio out and COAX. Three cheap HDMI to audio converts I bought all failed within a month. I’d had a AK4495 DAC with my Pi server via USB for some time and liked it. I decided to move to the 4497 chip (new from AKM) and bought a COAX only board. Realising too late if I got the board with USB and COAX I could use one brd. for the Pi and Sony player and be using the latest chip set plus displays.

I then ordered another brd and two pro heavy weight CNCed Al enclosures. I supplied the two trannies needed. The assembly takes about five hours but worth it. The panel is well lit and a Smokey front screen is also supplied. Lots of small bolts aren’t supplied but lucky I had plenty on hand.

At turn on the screen displays “AKM4497 DAC”. Then input; USB, COAX or Optical. Also which of six filters selected and bit rate. You can step through the filters real-time. Looks very pro and sound better than the 4495 and that’s saying something. Very happy. Now to sell off the other two DACs.

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Projects: | “La Ruse” - tube SRPP ECC83 preamp | "Noir” - Psvane tube preamp | ”fiih-300” - 300W Holton based amp | "Sortilege" - 180W Tripath Class D Mundorf upgrade amp |

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