Plugged my RPi audio out directly to a Lepai 2020A+ wired into ceiling speakers of unknown quality, impedance, sensitivity, and age. worked as well as any other audio source I had plugged into that amp/speaker combo.
I experienced no issues with popping or buzzing during or between songs. the volumio output appeared to automatically include a volume ramp up time at the start of output to address that potential concern. speakers and amp performed at least as well as can be expected.
Volume control was a little non-linear in Volumio - but that is quite possibly a fault on the Amp power supply ( I have not checked to see if the power supply provided from Lepai was even sufficient for the maximum rated power output of the amp which can be a concern with Lepai from what I am reading )
I may wind up going over to a I2S DAC at some point, but I just wanted to get an operational system and thought I would commend on the ease of setup and decent performance from the Amp I had sitting there.