Holy crap...I put it on the scope today noting connected... No speakers, no Bluetooth, no RCA's...(see third)
First thing I noticed, there is an audible hum/coming from the power supply while in standby mode.
Second, while turning on and the LEDs are circling around, you hear a very very faint click coming from the power supply until it's fully on... I'm assuming it's the relay.
Third, as I mentioned above... When I connected the scope's leads, there was a ~450kHz 1.5v peak to peak signal.
This signal seems to be evident during playback as I had the amp turned up to the 4th LED, my phone (iPhone 11 pro this time) was at 48% volume using a tone generator at 1kHz. The signal looked like complete trash. Now this could've been my fault, I'm still getting used to this scope and I was in a rush to leave. I will post screen grabs from the scope to show you guys... Maybe you'll have some insight.
The distortion is audible in music, Netflix audio (while watching shows), and everything in between..... At low volumes.
I'll update the thread with more, right now I'm not completely disappointed with the amp... But for the price? Come on.