> Ok, this is calm enough to me. > This may be so called calm-fan... No, I feel still it's noisy. At last, I tried DC-DC converter as adviced here. I use TDK-Lambda CC3-1205SF-E (3W type), and set it as 12V input and 6V output. Yeah! No noise now, and the top panel of this cubic small box is cold even at 31 degree C today!
Kenji
