Hi All! I did all the mods Skunkie advised. Thanks very much!:) Still warming up with pink noise but the sound is great already. And I have also find out that these 2 resistors terribly overheating. Looks like about 150-200 degrees or so. So i decided to replace them with 100W ones and place them on sides of the body with thermal paste ...just in case. But even these huge resistors are heating the case of Amp seriously. Really better for everything inside to put them outside the body. Also the diode briges warmig significantly. I've add the radiators with thermalpaste for them too: What do you think about to rid off all the grey coaxial links from it, from volume control resistor, from switch etc...:) and solder the RCA connectors with bold coaxial brand cables directly to the main board? You know, this is hi-end, no compromises at all!:)