This 4-channel power amplifier comes with DSP and Ethernet capabilities. It includes a proper power supply. However, you can't change presets on Channels 1 and 2 using the device button; you must use the app instead.

To use this power amplifier, first make sure it's connected to the correct power supply. Then, connect your audio sources to the appropriate channels. You can control most functions through the app, but note that you can't change presets on Channels 1 and 2 directly from the device - use the app for that. When it comes to maintenance, keep it in a cool, dry place and regularly check the connections for any signs of wear or looseness. If you encounter any issues, refer to the app or the manufacturer's support for help.