I have three Arcam P1s in total, two of which were purchased April last year. The problem is one of them seem to be producing an unnaturally loud 'buzzing' transformer like sound. I say it's unnatural because although the other two have small signature transformer sound, they are nowhere near as loud as this one. The problem is intermittent but has always been there from day one, it occurs infrequently but probably at least a few times every couple of days. To compound matters recently I noticed the second P1 has started acting strange whereby the sound will suddenly cut out during a listening session. The green power light will however stay on. The only way to get the sound back would be to remove the power lead and then plug it back in. On one occasion even this didn't work and the sound just came back on at its own accord. This problem is also intermittent but worse because it happens less frequently, three or four times a week. I've gone through all the steps and can say I'm 99% sure that it is not any ancillary equipment at fault. It's left me wondering, have I been extremely unlucky or has the shop fobbed me off with dud gear. They were the last two the shop had in stock before being discontinued. They came with full warranty and everything but the fact that the issues are intermittent has me concerned that I will have to make a long journey and spend time without any amplification for at least a couple of weeks only for them to be returned from Arcam saying there's nothing wrong! Has anybody come across any of these problems with their Arcam amps? How are Arcam at dealing with 'intermittent' issues? Is there certain fault finding procedures in place that will guarantee they find and resolve the issues? Any advice or suggestions much appreciated.