I plan to take the inexpensive way and use cheap russian K72P caps (placed in a wooden base under the Havana) for C9,C10,C11,C12 and the seven 0.1uf one.
For the output caps,I will go for the 1uf Rike S.
Is it safe to use 200v caps in the Havana?
0.1uf value is impossible to find in higher voltage rating than 200v with the K72P (the most closed value is .082uf).
So I don't know if I must use 0.1uf 200v or 0.082uf 500v for the seven last caps.
If both solutions are bad,I can always use FT3 (.1uf /600v) instead but I'm not sure if I will like their smouth sound.
And how about the input caps? is is better to stay close the original value (0.001uf 1000v) or is a higher value,lower voltage rating recommended?
My goal is to jump in musicality and definition but not invest too much because I'm not sure to keep the havana in the final.
I don't think being prescriptions... It is hard to say which solutions will be definitely better than another without a preliminary testing. Probably a higher capacity will sound better with Havana, perhaps not. I still believe, higher capacities than stock are safer; you remove some premises to go wrong. I can only take responsibility from what I personally know. May be are those who can give you more informed suggestions about this purely technical informations. One thing is clear to me regarding this DAC: must be looked for solutions in the film capacitors area!! Stock capacitors do not promise very much. I like Havana because you can play freely with it,... but you take almost all decisions.