I have the AO A150X at a large electronics discounter bought for 399, - incl. 40 Euro Voucher because just had anniversary. A super offer so. I was warned in relation to the fan, but he was thinking, well, maybe I catch a faint copy. Unwrapped, turned and lo and behold ... immediately went to the siren. When Antesten in the department store you can hear it now times not wg. Ambient noise. I'm really not a hypersensitive contemporary, but this noise is clearly annoying and makes the otherwise great device unusable. I never imagined then indeed already recommended here Software sucked and installed from the network, but the fan is off only up to a certain temperature - is too delicate, also the bugging is just a little late going. So I brought the part two days later back ...