its not stupid since it can happen dou to time,faulty manufacturing and few other reasons.
they should have used nuetrik...
did you contact access about this? im sure its not a big issue to repair if it is a hardware problem.
to make sure its not a software thingy ,choose an INIT patch then
turn the outputs to optimale level and patch volume aswell.
and run a sine wave. do you still hear hiss?