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Joined: Dec 2017
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YouTube just recommended this to me. A video from San Mateo Piano, talking about the main difference(?) between Kawai's DP actions GF2 and GF3. I thought it would be great to share with you guys.



https://www.youtube.com/watch?v=rJEAKI2jBLU&t=9s&ab_channel=SanMateoPiano

Last edited by Shawnchou.zx; 12/07/20 01:03 AM.

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Thanks for posting this Shawn; short and to the point. The video does a good illustrating the GF3 upgrades in engineering.

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I'd bet the extra 1/8" is just due to the black key cap, not a longer wooden keystick. Getting rid of the slip tape is what should increase long-term reliability. I wonder what accounts for the less-spongy feeling when you bottom out a key on the GF3? Can you comment James?

PS- Will the GF3 be available in a slab-type digital in 2021?

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Originally Posted by Tom Fort
I wonder what accounts for the less-spongy feeling when you bottom out a key on the GF3? Can you comment James?

Improved hammer cushion structure.

James
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That's a nice (and permanent) fix for the slip-tape problem.

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Originally Posted by Tom Fort
I wonder what accounts for the less-spongy feeling when you bottom out a key on the GF3?

I was under the impression that Kawai had simply stopped using little sponges under the keys; hence, a less spongy feeling. That made sense, but now James is talking about “hammer cushion structure” and such.

I never did understand why Kawai would be using tiny little sponges under the keys; go figure!

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Kawai James talked about hammer cushion structure from the very beginning, when GF3 action was announced in new models:

Originally Posted by Kawai James
- Revised hammer cushion structure
This is difficult to see in the reference image above, however the composition of the hammer cushion has been changed.
This results in a firmer key stop feeling, and also a slightly faster key return.

And "sponges" under the keys are used by most if not all piano actions.
https://www.steinway.com/piano-action

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Originally Posted by 9190
And "sponges" under the keys are used by most if not all piano actions.

I must disagree, for a nail is not a screw and felt does not a sponge make!

I will not, under any circumstance, accept a million little sponges under my piano keys; therefore, I hereby object to a perception that cannot, and will not, hold in a court of law!

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Originally Posted by Pete14
I never did understand why Kawai would be using tiny little sponges under the keys; go figure!

To absorb the extra moisture from the players fingers.

(😉)

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Oh, I see; but still I do not approve of it!

A sponge should be used for scrubbing, soap for lathering, lube for sliding, and ivory for tickling. Besides, what’s so wrong with a little moisture? It’s dryness that we should be concerned with!

There’s no better time to play the piano then right after having an oriental manicure, for the hands are nice and moist, and the spirit is pampered!

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The sponges are there for the spilled beer. And don’t pretend it never happened to you.

Shure vocal mics started this with the beer-soaking foam sleeves for SM-58s. They really worked, and I could tell because my microphone always smelled like a beer.

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When she pulled out that RULER and read out Length of the keys, I Lost it. MORE Ruler videos PLEASE.

Measure EVER PIVOT, more pivot videos. This is exactly what everyone wants to see @ piano world.

Some questions I still have,

When she measured it, is that additional 8th inch from the end cap or is the WOOD longer.

I like the improvement they've made on the GF3, are they using POM plastic end pieces + krytox.

Is the GF3 adjustable like the capstans in the GF2 would be ?

Last edited by jeffcat; 12/07/20 01:14 PM.
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Originally Posted by jeffcat
When she pulled out that RULER and read out Length of the keys, I Lost it.
That was great!

She perfectly illustrated the (awesome) action improvements & quickly dismissed the length "improvement". In 60 seconds.

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It would have been more helpful if she had measured the pivot lengths on both actions and confirmed they were the same.

And... I'm not a fan of nose rings.

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Originally Posted by Tom Fort
It would have been more helpful if she had measured the pivot lengths on both actions and confirmed they were the same.

And... I'm not a fan of nose rings.

Exactly right Tom, more Pivots.. we love the measuring tape and Pivot-talk.

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Originally Posted by Tom Fort
It would have been more helpful if she had measured the pivot lengths on both actions and confirmed they were the same.

I agree.

She probably is unaware of the interest on the subject. Just because someone works in a store doesn't mean they know a lot about the products they sell.

I used to see this in gun stores quite regularly. Lots of ignorance concerning laws and product in that industry (at least here in CA).

It has always bothered me because I feel that if I were going to sell something, I would want to know more about it than the customer.

God Bless,
David


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Originally Posted by David B
Originally Posted by Tom Fort
It would have been more helpful if she had measured the pivot lengths on both actions and confirmed they were the same.

I agree.

She probably is unaware of the interest on the subject. Just because someone works in a store doesn't mean they know a lot about the products they sell.

I used to see this in gun stores quite regularly. Lots of ignorance concerning laws and product in that industry (at least here in CA).

It has always bothered me because I feel that if I were going to sell something, I would want to know more about it than the customer.

God Bless,
David


Everyone, it's our DUTY to INSPIRE Pivotry on that youtube Video's comment section. The piano world must know of this critical specification front and center.

Last edited by jeffcat; 12/07/20 04:45 PM.

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