Yes. I hear the ticking in both headphones and speakers. I moved my studio to another part of my house and still having a Hiss in the audio. I suspect its probably wiring in the house. Power conditioner may or may not help but may be an option.
Judging by the thread that halcyon has posted above seems like there is quite a few people with this same issue, so I probs wouldint think it had anything to do with the wiring of your house seems to coincidental that me and my friend are both getting the same issue "so don't be pulling any plasterboards off as of yet" :-)