I noticed an issue in the built in speakers since the day i purchased PX 560. When the volume is over 50% and I play bass notes between E1 to A2 I get buzzing noise and vibration. This noise is very noticeable for E.piano sounds and Fingered bass sounds.
I also got it my piece replaced and the new one also has the same problem.
Can anyone let me know if this is a known issue?
PS: This is not applicable when played with earphones, external speakers and usb recording