need electrical help with integrated amp

Hello, I recently purchased a Rega Elicit amplifier and when it arrived it would make a very soft static sound ONLY out of the right channel speaker and when i switch speaker connections the static sound would switch speakers. The static will turn into 15-20 second moments where the speaker will have a hiss(like a tape recorded really badly with no dolby sound reduction on a cheap cassette deck) and then it will subside. the his isn't effected by volume either. After a two hour listening session to see if it needed break in time, i turned it off. The next day when I turned it on the unit had an alarming very loud buzz that only came out of the right channel speaker outlet. When trying to work out a claim with the shipper the unit rested for a while. Before I mailed it back i tried to turn it on one more time and the alarming buzz stopped, but the static was still there. I assumed the unit got damaged in shipping somehow and a wire shook loose. I sent it to the authorized service man and he checked it out and gave it the ok, sounds great and i should be happy with it. I get it home take it out plug it in and the same static sound comes out of the right speaker channel. Do I need to reverse the polarity of the unit since it is made in England? Would this cause the right channel to discharge. The sound of the unit is beautiful and I want to treat it right so it will last a long time. I have eliminated speakers and the house wiring. Can someone offer specific estimations of the cause so I know some proper terms to use when discussing repair options again? Thanks for your time and consideration, Floyd. please email any help to
try checking the circuit board in the amp (if you are technically inclined) for cold or loose solder joints. i have a Rega Brio that developed a bad joint AFTER i had the unit for three months! the sound it produced sounds VERY MUCH LIKE WHAT YOU HAVE DESCRIBED!!!
if you dont find find a cold solder joint,you could have a leaky capacitor on the driver board or the power supply.if you have a variac you could slowly bring up the power to check.but this his could just be a noisy cap causing ripple voltage.hope this helps you some.