And about Mosfet ZVP3310A. I'm using IRF9620 and work OK. IRF9610 is better than IRF9620. IRF9520 is also good choise. There is no problem with part, maybe the capacitors (quality and values) are quite important.
Yesterday I tested one channel with the ZVP3310 and the other with the IRF9610. I was a bit sleepy but just could not hear any difference. Have you heard any difference or your opinion is based on measurements only? (I don't have a scope so just have to trust my ears).
Anyway I'll try to find the BS250 to give it a try.
The difference was not big and only at the top end. My speakers, 4-ways 94dB, use ribbon-tweeters with really high resolution. I also own only since two weeks a skope and the tests where made before. Now I am building a SOZ.
P.S.: No, no soy español, soy suizo de habla alemana, pero mi madre es española
Hi. I'm building a BOZ/Zen4 amp. With the BOZ I had no problems finding parts, but for a Zen I can't find ZVP3310 (I can get IRF9610, but think BS250 is better for its Ciss=30pF). So I will try with a BS250, but I first want to hear from you guys what do you think about both of them, and do you have to change something in the circuit for BS250 to work well. If you must change things, could you specify what to change, with specific part names and values. Thank you in advance.
At the end the only change was BS250 in place of ZVP3310, VDS will be around 2.5V instead of 4V. I tried also BSS92, IRF9610 and IRF9520, but BS250 sounded better. I am listening to this amp now for 6 months and I am very happy with the sound.