Kawai ES-520 W

I am so happy with this product. The keys with Responsive Hammer give you a lovely sensation as you won't stop to play it. Easy to navigate through the menu and understand how it works. Lovely and loud sound. Beautiful look. The only problem is an annoying buzz/distortion appears near the left speaker when playing the B flat note in third But the noise it doesn't come from the speaker, it comes from the casing, if you put your hand on top, the distortion doesn't appear. I recommend improving the quality of the casing. If someone can give a piece of advice to avoid the noise will be great.