I have some advices for those who want to listen to Havana for a long time ago and achieves a superior sound quality (otherwise it is not justify to reselling..)
To achieve their full sound potential and to overcome much its class compared to unmodified version, I speak from my experience regarding this DAC, it is very important to invest in all sections.
- film capacitors: output (0,47uF)/input (0,01uF), C11 section (0,22uF), C12 (0,01uF), and what is equally important 0,1uF (all seven film capacitors)!
It is the choice of everyone which choose there, but it is recommended something qualitative: Audyn, Rike Audio, Jupiter, V-Caps, etc .. These are a few tested solutions. I have chosen V-Cap CuTF mixed with Rike S-Cap, a very good combination.
On the other hand there is a kind of ranking to prioritize those critical components. I don't pretend that everything is located right in terms of absolute.
From my point of view is the following (the first are the most important, last the least important):
- V-Cap CuTF for output (or Duelund Cast PIO).
- V-Cap CuTF for input (or Duelund Cast PIO).
These are probably the best solution.
- Rike S-Cap PIO (0,10uF) or something else but better than Auricap. Remember, better!... As I said, it is important to put instead 0,1uF stock film high quality capacitors.
- Electrolytic capacitors: I don't recommand to investing much here (for example Black Gate are too expensive, prices are stealthily for these capacitors...)
If I were to start all over again probably I would satisfied with Elna Silmic II. Elna are very good with an unbeatable price-quality ratio.
- further I think I bet on S-Cap or Audyn TC on C11* instead V-Cap Cutf becouse V-Caps are too expensive and break-in extremly hard here. It is a real pain to do this...
* i'm not pretty shure if this is the correct position in the hierarchy.
- PCM56P - K grade chips;
- R-core transformer;
- Elna ROB Tonerex (4pcs), power supply capacitors;
- Resistors (Shinkoh Tantalum) around the tube socket;
- Conectors (rca)
- Schottky diodes,
- Small Isolation Feet
Some permutations can occur in this list according to personal preferences, but overall ranking is accurate.
... so, I thing the Film capacitors are the greatest impact, followed by electrolytics and connectors resistors, diodes, fuse, etc.. bringing even minor changes.