Cambridge 840a volume ramping

i recently purchased a cambridge audio 840a integrated amp. the default setting on the amp has the volume ramp down to zero when i put it in standby, and then the volume ramps up to the previous volume setting when powered back on. the ramping up and down makes alot of clicking noises as the volume goes down or up (this is normal and apparently is the sound of the 'pots' used to control volume).

i can also set the amp so it doesn't ramp down when put in standby. when powered back up the volume setting is where it was when put in standby, without any ramping down and up.

so, whether i use ramping or not, when i turn the amp back on i arrive at the same place in terms of volume.

finally to my question. why would cambridge audio have these two options for the volume, and why is the default setting the ramping up and down option? i'm assuming this option is somehow desirable since it is the default.

thanks, jeff