If there is an error in time alignment then sounds that should image somewhere between a pair of speakers will instead image to one side or the other of the intended location.
I cannot recall ever having heard it. I recycled the power on the 103 just now and heard no clicks at all. The only noise is the initial spin up of the disc mechanism. I will try the 105 when I get back to the city.
I know but that is all I could do here. I will add that I do not, typically, find relay clicks disturbing as I grew up with electronics with solenoid controls and the clacks were reassuring. I also never found the well-discussed clicks on the Integra to be bothersome. The only clicks that concern me are those that migh occur during the actual playback of the program material.