Causes. In ALS, the nerve cells that control the movement of your muscles gradually die, so your muscles progressively weaken and begin to waste away. ALS is inherited in 5 to 10 percent of cases. The other cases appear to occur randomly.
1 The smaller studio uprights usually weigh between 400 and 600 pounds. 2  The monstrous full vertical or large upright piano can weigh as much as half a ton.  A studio piano's center of gravity is also lower than a large upright's, as it is about 4 feet (1.2 m) tall as opposed to a large upright's roughly 5-foot height.
The spinet piano weight, dimensions and price. The spinet is a small keyboard musical instrument which has one row of strings and one manual. The spinet piano weight is 300-500 lbs. It is twice lighter than upright, which is 900 pounds approximately. Unlike the other types of a harpsichord, spinet strings are tensioned diagonally (from left to right). This instrument has been known since 16th century.