Any risk of shorting out the speaker terminals when the BHK amp is in standby?

Is it safe to swap out speaker cables when the amp is in standby mode, or is it recommend to turn the power off using the switch on the back?

It would be Ok to remove the speaker cables in standby mode… Same with the interconnects, but for peace of mind I usually switch off at the rear main switch when changing interconnects. Yes you can remove the speaker cables whilst in standby mode!