wa300 profet3.2 amp noise silent

Hi, I recently bought a WA300 head mainly as a back up to my ProFet 3.2 and this was largely based on my excellent experiences with the ProFet 3.2. Firstly, the ProFet is powerful, does the tone I like very well and is astonishingly quiet/noise free for a 300watt amplifier. In fact its whisper...