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Joined: May 2021
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ilai.bz Offline OP
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Hello there, I’m moving to a new house with my family and we want to purchase a new grand piano between 4’9 to 5’3 (151-161 cm), I read a lot in online forums that you need at least 10x the size of your piano, I want to know how bad is it to put my grand in 7-9 squared meter room, felling is 2.7 meters, don’t think about neighbors or anything related, I want to know how it will effect my grand acoustically and just how it will effect, ty so much for help

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ilai.bz Offline OP
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The room is 9.3 squared meters and the ceiling is 2.65 Meter

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I think you might find the sound of a grand piano as short as that, rather disappointing, whatever the size of the room. Might a large upright suit you better?

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Originally Posted by ilai.bz
...I read a lot in online forums that you need at least 10x the size of your piano...

I personally think this is BS, small pianos are quieter but the difference is mainly in the bass, loudness of mid-treble section is not very different from larger pianos, only big concert grands (2.7m+) are designed to be actually significantly louder.

My solution is: buy 1,8m - 2m grand but one that is easy to control in low dynamics, it should be voiced for low dynamics and have light hammers.

You're not going to solve your problem by buying some 1.5m piano, they sound terrible and aren't actually much quieter.

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ilai.bz Offline OP
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Originally Posted by ambrozy
Originally Posted by ilai.bz
...I read a lot in online forums that you need at least 10x the size of your piano...

I personally think this is BS, small pianos are quieter but the difference is mainly in the bass, loudness of mid-treble section is not very different from larger pianos, only big concert grands (2.7m+) are designed to be actually significantly louder.

My solution is: buy 1,8m - 2m grand but one that is easy to control in low dynamics, it should be voiced for low dynamics and have light hammers.

You're not going to solve your problem by buying some 1.5m piano, they sound terrible and aren't actually much quieter.

I’m not talking about loudness, im asking if I will have bad acoustic due to 9.3 squared meter room

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My 7’ is in a small room. Practise rooms at good music schools have grands in small rooms.

The point is that you should get the piano you want based on musical reasons rather than the room it’s going to be in. My piano is quite loud for the room, it hurts my ears when it’s open and so I have it entirely closed most of the time, but the benefits in tone for the tenor and bass range is worth it to me as a professional pianist vs. a smaller instrument. That may not be your needs, but consider what kind of sound you want. Maybe a small piano is great for your needs, but maybe not. Voicing the piano for the room is an important part of the process.

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Make sure you choose your piano based on how it feels and sounds, not on the basis of someone telling you “anything smaller than x is garbage.” Some excellent advances have been made in small piano design in recent years, and even among older pianos, you can find fine instruments, provided they are appropriately set up. I service a number of 157 cm pianos - Yamaha G1’ and C1’s, Young Chang G-157 (1988 ish) and a Knabe from the 1920’s. Some I like better than others. I have taken a deep dive into the Knabe and a couple of the Young Changs — bass rescaling, reducing weight in the treble hammers and thorough touch weight revision — and have come up with results that are truly musically viable. I would not choose an upright over these instruments.

As for room size, at the university where I work, we have a 6’ Yamaha G3 and a Boesendorfer 200 (2m) together in a teaching studio small than the room you are describing. Maybe not the setup you would want in your living room, but I don’t hear anyone complaining that the pianos are too big. Make sure the piano is appropriately voiced, and you should be able to get the dynamics you want when you need them.


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Small square room is bad for acoustics no matter what sound source there is. Reflections in a small room are short and make sound muddy and rumbling instead of reverberant, while square size makes room modes even more pronounced for basses.
The best you can do is make the sound dry by absorbing reflections at least at first reflection points for player and listener.
Bass traps in corners to help with room modes, and carpet under the piano with absorbtion panels on walls (and on ceiling if possible) to absorb reflections can make the sound decent. Any openings to adjacent rooms will help as well.

Last edited by VladK; 05/09/21 01:05 PM.

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ilai.bz Offline OP
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Thank you guys so much, you guys really helped ty so much

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I have a 5’3” grand in a smallish room and it suits my needs just fine.

I’m happy with the size of my piano and the room is an awesome music room.

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[img]http://forum.pianoworld.com/ubbthre...dible-things.html#lg=3099927&slide=0[/img]

Here is a picture.

Of course, it comes in as a link to the picture. I suppose I will never figure out how to post a photo on pianoworld.

If someone tells what to do I will be forever grateful

Last edited by CaseyVancouver; 05/10/21 02:22 PM.
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Casey's picture:

[Linked Image]

Casey, in brief: right-click on the picture in the Gallery / "copy image address" / Use Full Editor / click the image button / right-click in the box / paste - that's it!

Last edited by David-G; 05/10/21 02:28 PM.
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I don't think Ilai has told us that his room is square in shape. Ilai, what are the actual dimensions of your room?

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Originally Posted by David-G
Casey's picture:

[Linked Image]

Casey, in brief: right-click on the picture in the Gallery / "copy image address" / Use Full Editor / click the image button / right-click in the box / paste - that's it!

So, what's the basic rule of thumb here? A grand should occupy be no more than 10 or 30 or 40 percent of a room? Of course, assuming its a mainly piano room with occasional vocal group of 5 singers or 2 cellists like Casey's...

BTW, the room size is the variable here. smile


Hard at work while waiting for my dream DP....

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