The Denon PMA-600NE integrated amplifier can be configured to automatically enter standby mode if not operated for more than 30 minutes. Instructions for enabling auto standby mode can be found under the Settings section of the online Owner’s Manual:
The Owner’s Manual is available for download in PDF format here:
And the instructions for enabling/disabling auto standby mode, copied from the Owner’s Manual, are:
Press and hold AMP POWER Power Button for 5 seconds or more to switch it on and off. The power indicator changes as follows each time it is switched on and off.
- When auto standby mode is on: The power indicator blinks in green three times.
- When auto standby mode is off: The power indicator blinks in green once.