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Hello..Concerning a year old 210; Four adjacent keys (23-26) have a wooden clunking sound when they hit the string. At recent tuning, my tech said (as best as I can remember/explain), that it was due to the harmonics of the wooden hammerhead and the shank. Previously, I asked someone at a piano shop that does rebuilds, and he said it was loose screws. What's strange is that the keys so effected are adjacent to each other. I first noticed it about two weeks ago. I'm rather light handed on the keyboard, but my girlfriend plays like she's at Yankee Stadium. What do you think ?

high quality recording please

Tightening screws is a good first step. Checking for loose heads and knuckles is another. Checking for foreign matter in the action is another. A high damper stop rail, or a low (or loose) key stop rail are other possibilities. None of these are difficult to check or fix.

Do not do anything yourself if the piano is under warranty.

Good advice above.

Peter Grey Piano Doctor

I have the same problem with my 5 years old Estonia 190 but with the keys 31-34. I'm not able to record it, my wife don't hear what i mean but it's very clear for me and the clunking sound is very very irritating. I checked all the screws, i searched a lot for unglued parts but i don't found anything.

Estonia have a 10 years warranty, I'll do a warranty call one day but my problem is that i'm in a isolated region away from it all.

I'm really afraid it would be unglued wood parts in the piano, the sound reminds me of that a lot. The fact that the noise is coming from 4 adjacent keys leads me to believe that the problem cannot come directly from the specific action of these notes.

Keep us updated Chris with what you find as the cause of your problem please.

I think the likeliest possibility is loose key stop rail nuts.

I was thinking the same thing, but I have reached my quota of dumb posts this week and it's only Monday. I know on my Walter if the rail is too loose or too tight, groups of black keys will thunk just like these posters describe, but if it's too much, then other keys get held down. It's incredibly tricky to get it just right to the point that these posters should just get a tech in there to mess with it and watch very closely so they can do it themselves when it happens again, because it will.

Key stop rail, forgotten and found. Thank you !!!

It is also common for hammer rails on grands to be loose, but not all grands have them. For both them and the key stop rail (also not on all grands, and only on some uprights), the bottom nut has to be properly raised so the keys can lift about 1/16" or 2 mm and then the top nut tightened.

The hammer rail on grands should be about 1/4" or 8 mm below the hammer shanks when the hammer blow is correct. Usually only one is loose, so you can raise the bottom nut so it touches the rail, and then tighten the top nut if you are not sure about the hammer blow. The height of the rail is only approximate; the important thing is that when you push down on the hammer shank, nothing hits a solid object, like the wippen flange or something on the top of the wippen.

Thanks so much everyone. I guess it's warranty time. Cluster, I've got the same outcome when I describe the sound. My girlfriend can't hear it, the tech notices it somewhat, but it drives me nuts. Been blessed (?) with extra neurons in the hearing dept.

Welcome to the club. I will hear things, my wife won’t, and my tech will but not see it as big of a deal as I do.

Then a week later when I’ve accepted it, my wife will ask, “What’s that terrible noise?!”