I'm getting a hum from my speakers which becomes more audible at higher volumes, I have sony la 500 ed speakers and a sony 1080 amp which I brought some time ago after reading what hifi review and have been extremly happy with it other than the hum which i am wondering if it is mains interference as my new house has low voltage lighting with transformers and dimmer switches. is this something that a mains conditioner could help with if so can anyone reccomend one that really works well. my budget is up to £100. I would like to be able to plug my amp, sacd player, dab radio, hard drive and dvd player in to it if possible although the amp is priority. hope some one can help as it bugs the hell out of me when there is quiet sections to films etc.