The Acrosonic was introduced in 1936 by the Baldwin Piano Company as a very economical choice in the heart of the depression. From the earliest versions, quality construction and materials were incorporated in these instruments. Baldwin made other spinet pianos which they labeled as “Baldwin” or ”Product of Baldwin”. These are a lower quality piano compared to their Acrosonic line.
Most Acrosonics are spinets up through the late 1970’s. After that time, the name was also applied to a variety of console models. Spinets are the shortest pianos made, usually about 36 inches tall. Spinets have full sized drop actions, the parts are the same size as studio pianos. The keys are shortened to make room between the ends of the keys and the strings (while the case is usually about an inch deeper to minimize this somewhat). The action is lowered to between half and completely under the level of the keys.
Console pianos will have full length keys but a compacted action.
A linkage mechanism is used to connect the ends of the keys to the action. The different leverage characteristics found in this mechanism accounts for the different “feel” usually assoiciated with spinets. However, if the piano is properly regulated (something often not done by spinet owners or tuners) the touch will be nearly identical to larger pianos.