Iâ€™m unsure wether itâ€™s hardware or software related, and unfortunately I didnâ€™t get a chance to record it for you guys before the kids went to bed, so now Iâ€™ll have to wait until tomorrow the earliest...
Iâ€™ll probably contact the retailer and have them send a technician over if I cannot get a good enough recording and a confirmation that itâ€™s normal. Perhaps the right side speakers are faulty, in that case the exchange procedure should be simple, right? If itâ€™s something else then I donâ€™t know what there is to do. I doubt theyâ€™ll exchange the whole unit or take it back for something like this.
And even if it were to come to that, I have no idea how in the world Iâ€™ll manage to package it and send it back properly having thrown all of the original packaging away.
If is a problem with the speakers or amplifier then it is quite likely you would hear it when playing other instruments at high volume...
In any case, I would ask Kawai to send over a technician.
On another thread, a similar complaint. A real longshot, hardly believable. The On/Off switch vibrated to a certain freq and threw things in turmoil. The Tech bypassed the switch? Problem solved.
Well, I had this issue with the volume slider, not the power button. Sometimes it vibrated and produced a humming noise at specific frequencies. For a while I worked around it by placing a plush toy from the kids over the volume slider
Then I inserted a thin layer of felt between the cabinet and the plastic assembly where the power button and the volume slider are and that seems to have solved the problem for good.