New to Overclock.net
Join Date: Jan 2012
Location: Mississauga, Canada
Ya amps on their own don't have any moving parts, in the Z/ZXR's case they are just IC chips that provide the necessary output voltage. Most high end audio equipment will include a magnetic relay wit the amps though to delay the sudden onset of high DC voltage that could harm speakers or headphones. Just like Paul said.
The Z does not have this likely due to one of two reasons. Either Creative didnt feel the need for it as the amp IC in the Z is not very powerful or they just wanted to have the best possible design on their high end card for principle.
The Xonar STX and the Phoebus do the same thing at startup or switching from headphones to speakers.