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Reducing blow strength/power

  • 1.  Reducing blow strength/power

    Registered Piano Technician
    Posted 08-11-2025 18:20

    Seeing as I'm seeing this customer tomorrow I suddenly realize I probably should have posted this weeks ago. That said, I'll take whatever advice I can get in this short time. 

    1998 Young Chang TG-50.

    Recently had to replace the expanding action brackets. 

    It's in a small church and the pastor, who is also the main player, loves to pound. Not for loudness but because he has always played that way. Jerry Lee Lewis style. He has already broken several bass strings at the agraffe. His piano playing style is not going to change, and he's not going to invest in a larger piano that will take this much hard playing so he has agreed to re-regulate to reduce the amount of power the hammers are inflicting on the strings. 

    Todays question: Is it better/easier to decrease blow distance or increase letoff? Or maybe a bit of each. And, is there a quick and easy way to do either?

    Looking forward to your replies. 

    -- Thanks



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 2.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-11-2025 20:15
    Geoff

    You can do both, and even reduce key dip to solve the problem, but all three steps have to be on each key. There is no universal setting that will accomplish this.





  • 3.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-11-2025 23:41

    Thanks, Wim.

    Yeah, I am prepared for having the do each key separately. And customer already understands why the change is called for and the time and cost. But sometimes there is a shortcut that is not well known, so I thought I'd ask. Hadn't thought of reducing key dip, so thanks for that tip. 

    -- Thanks



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 4.  RE: Reducing blow strength/power

    Member
    Posted 08-12-2025 07:19

    If blow distance is decreased or let off is increased, key dip will have to be reduced to maintain correct aftertouch. 



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    Trevor Penner
    Hillsboro KS
    (620) 877-0306
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  • 5.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 11:06

    Trevor --

    I agree. All three should be addressed for acceptable performance. 



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 6.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 07:41

    I have no idea of the consequences but it seems to me that if one raised the glide bolts slightly it might affect the change desired by flexing the frame absorbing some of the energy.



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    Larry Messerly, RPT
    Bringing Harmony to Homes
    www.lacrossepianotuning.com
    ljmesserly@gmail.com
    928-899-7292
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  • 7.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 12:00

    Larry's idea is interesting! We are taught that to get maximum power transfer, the balance rail must be properly bedded. It makes sense that raising the glides and inducing flex would remove power-especially on fff playing, where the flex is likely to be the greatest.

    Another thing to consider is putting some bushing cloth under the back rail cloth (if it's not glued down), or even on top of it. The nice thing about this is that it decreases the blow but keeps the proper key dip relationship by lowering the keys proportionally. Moreover, it is quick and reversible.



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    Ryan Sowers RPT
    Olympia WA
    (360) 480-5648
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  • 8.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 13:41

    Ryan --

    HAH! What a great idea. I'm gonna try that back rail cloth trick first to see what it does. Thanks.



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 9.  RE: Reducing blow strength/power

    Posted 08-12-2025 08:03

    A fellow technician who's skills and knowledge I respect (he takes care of all the pianos on one of the cruise lines - including the PIANO BARs) has told me that whereas decreasing blow and increasing letoff can have some beneficial effects (although limited), his recommendation for a pounder pianist has always been to mic the piano and set a monitor speaker pointed at and just to the side of the pianist. He has told me that if anything is going to work, that will do it. Oh, and turn the volume on the monitor speaker UP!



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    Terry Farrell
    Farrell Piano Service, Inc.
    Brandon, Florida
    terry@farrellpiano.com
    813-684-3505
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  • 10.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 11:25

    Terry --

    His grandfather started this little church. He learned to play from his father. They all are/were pounders. He knows he is overplaying the piano but he says his enthusiasm just takes over and that's where he unintentionally winds up. It's not about being loud. Thanks for the tip on the monitor. I have no idea how his sound person is setting up the stage for the band. I'll ask about monitors when I'm there today. Good idea.

    I had another customer, a young customer, a long time ago, who pounded her Yamaha upright at home out of anger. It wasn't about being loud. She just did it to release. She was also breaking strings very frequently. I adjusted both blow distance and letoff, but nothing else. She said she loved the increased aftertouch, which was a lot. She also hasn't broken a string since. 



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 11.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 11:48

    I know it's too late now, and probably not a possibility considering the circumstances, but rescaling the bass might help.  I tune for the Shouthouse here in San Diego, where the "schtick" is beating the $%^$ out of their dueling pianos.  I had JD Grandt rescale the strings for their C3's, and there is much less breakage than before.  YMMV.



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    Paul McCloud, RPT
    Accutone Piano Service
    www.AccutonePianoService.com
    pavadasa@gmail.com
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  • 12.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 13:53

    Paul --

    Not too late. I'm just now walking out the door to go to that location. 

    Rescaling the bass is a great idea but it would probably cost more than the piano is worth. It was donated to the church about a year ago in unplayable condition. Even with the new action brackets it's still just a teeny tiny 1998 Young Chang TG-50 "baby" grand that's seen better days.



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 13.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 13:47
    Geoff,
    Why not just regulate the piano properly, and remove any string grooves in the hammer?

    I understand about the forceful playing style not going to change. I don’t see that as justification to improperly regulate the action. I think increasing let-off is counterproductive, and may lead to even more string breakage. When heavy-handed players can’t get the volume they seek, they throw the hammer with even more force toward the string to overcome the lack of fine control of let-off. And clearly, if you reduce hammer travel, you will have to reset the key travel. Heavy playing with too much aftertouch can lead to broken jack tenders.

    Perhaps the pastor just needs some piano lessons so he can learn to play without abusing the instrument.

    Joe Wiencek
    NYC




  • 14.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 15:32

    One could also double one's charge to repair/replace broken strings. Simultaneously suggest they set up a specific fund to repair/rebuild the piano. Then use all XM wire throughout. Give them a figure and that becomes their goal. Once they get the money the piano gets rebuilt. 

    Peter Grey Piano Doctor 



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    Peter Grey
    Stratham NH
    (603) 686-2395
    pianodoctor57@gmail.com
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  • 15.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 19:10
    Sorry if it's already been mentioned but... how's the hammer shape?  IIUC flat hammers deliver their force a bit closer to the front termination, and this can promote string breakage.  Caveat, I've usually heard about reshaping being an aid w/rt the capo not the agraffe sections, but it might not hurt.





  • 16.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 19:26
    I wanted to add...  If the player has already broken several strings, the rest should be considered suspect as well.  You may already know all this, but strings don't necessarily go from OK to broken in one single step.  Hard blows can cause the wire to go a little past its limit of elastic deformation without actually breaking it, but when that happens it "work hardens" and becomes more brittle.  That change is permanent.  So it might break on the 10th or 100th excessively hard blow, rather than the first -- even if the breaking blow wasn't as hard as some of the previous ones.
    In short, the current strings might already be doomed.  Not saying you shouldn't try to reduce the strain on them, but sooner or later the customer needs to accept that playing in this way means continuing repair bills :)






  • 17.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 20:47

    UPDATE:

    First off, my apologies for misidentifying this piano. It's a 1998 Young Chang TG-150. A 50 would only be about 20" long. Oops!

    I wound up adding some bushing cloth to beneath the back rail cloth, plus just a touch of reducing blow distance. The hammers are now resting about 1/2 the thickness of the shanks higher than before. Maybe a little more. I can see and feel the difference in aftertouch but the customer couldn't tell. 

    On the other hand, I did my good deed for the day. I have another customer who is moving and wants to get rid of their 1976 Kawai KG-2C. It's in great condition and I've been servicing it once a year for the last eight. I put the two customers in touch with each other and the Kawai owner agreed to donate the piano to the church in return for some kind of tax donation form. The Kawai is going to replace the Young Chang and the Young Chang is going to be moved into a multi-use room, where it will get played much less aggressively, replacing an old beat up spinet. Everyone is happy. Including me. I got a nice tip and now I don't have to work on the spinet. 

    Thanks to all for your recommendations. Helped a lot.  



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 18.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 22:55

    Geoff, you might want to get ahead of the situation by using any or all of the above mentioned remedies to reduce the power of the keystrokes before the maestro starts breaking strings on the Kawai.



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    Steven Rosenthal RPT
    Honolulu HI
    (808) 521-7129
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  • 19.  RE: Reducing blow strength/power

    Registered Piano Technician
    Posted 08-12-2025 23:16

    A fairy tale ending!



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    Tim Foster RPT
    New Oxford PA
    (470) 231-6074
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