Bolt Ball BS120 Theoretical Weight

Bolt Ball BS120 theoretical weight is.

Quality control of bolt balls.

There are six indicators:1Ball blank diameter; 2.the roundness of the ball; 3.bolt ball screw hole end face and ball center distance; 4.The parallelism of the end faces of two screw holes on the same axis.

5.the angle between the axes of the adjacent two screw holes; 6.The perpendicularity of the end face of the screw hole to the axis.

Calculation formula: pi * h2 * r) - (pi * h3 3), where pi: pi.

2.H: Height 3: R: Radius, Note: The unit weight is generally subject to the direct provision of the manufacturer.

Bolt Grid Accessories Weight Table:

The Parrot 120 bass three-row spring is about the same, which is estimated to be about the same as the Jinbei brand.

30 pounds, mine is also a golden cup, weighed.

You can calculate that starting from the C in the middle, the bass range is pure fifth up and down pure fifth, 120 repeats more, it is easier to play, there are more pitch changers to make it more timbre, and the right hand keyboard also has a few more keys to make it suitable for larger songs, I remember that the left hand may have an extra row of reduced seventh chords, and 80 is only a seventh chord. But it is also larger and inconvenient.

120bs means that there are 120 buttons in the bass part of the left hand. 80bs, that's 80. Of course, an 80bs piano is smaller than a 120bs piano. 120bs is the largest.

The bass is the left-hand part of the accordion, and the 120bs is the left-hand part with 120 keys, which is the standard, commonly used model.

It is the amount of bass in the left hand, and it also determines the size of the piano.

Hello It is not recommended to choose the accordion of the parrot, now the parrot factory has been converted into a township enterprise. The workmanship is really rough. You can opt for the Golden Cup Baile or, if you have the funds, Hohner's accordion.

To choose an accordion, first check whether the bellows is leaking, the method is to pull the bellows hard to see if the air leakage is serious, and then listen to the timbre to see if there is a phenomenon of dissonance, and to check whether the bass key is active normally, and check the appearance of whether there are serious scratches and so on. The one you choose is the best one that suits you, and I think that's it.

Finally, I wish you all the best in buying a piano!

My pianos are all parrots, parrot piano acquaintance point, timbre belongs to the bold kind, if you like beautiful and delicate then the principle of Baile, this is an old brand, what Jinbei, Baidi, poor quality, ** expensive, always bad. As for buying a piano, it depends on the wind and leakage, it depends on how the vocal music is under each voice changer, it is better to find someone who knows how to buy it, it is not very clear, depending on the specific situation, you still find someone who knows how to buy it, it is more safe! I hope you buy a piano that you like

Although the parrot's sound is relatively bright, but the keyboard is not as easy to play as Baile Baile plays it is very heavy It has a very solid feeling The brand of the double cup does not want to I don't know much I used to have 48 basses 90 basses and later 120 basses are all Baile It has been put for many years Now the effect is still good Hehe.

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Personally, I think the timbre of Jinbei is better!

Because I have used both brands of pianos!

If you want a bigger change in timbre, it is recommended to buy an imported piano from Italy: Bugari or Germany: Honner

Jinbei, I used the Jinbei, the teacher went to the piano shop with us to pick up the 120 bass, Baile is not hard with the Jinbei brand In fact, the parrot is quite good, the old brand is ......Of course, if there is a way, it is best to import one from abroad, the sound that pops up is really quite different from the domestic sales, and it feels very good, and there are imported from Germany to learn together, which is great

Of course, it's a gold cup.

The Jinbei echo piano sells very well, and the tone is very good.