Xcan head phone amp problem

[diviy]

I have just had a Xcan headohone amp turn up (early birthday pressie off the mrs)
connected the power supply to the amp and the power supply is making a noise like a fish tank pump
I have turned it off straight away I have not connected to my system at all
any advice and help please

Gerry

[Floyddroid]

Send it straight back from whence it came