Acoustic uprights have their own advantages. They are less expensive than grands. They take up less space, and for small rooms, large grands may produce too much sound so that they cannot be played full blast with the lid fully open without hurting or even damaging the ears. Grands, with the lid open, are very sensitive to touch. Thus grands require hammer voicing more frequently than uprights; otherwise, they become too "brilliant" or "harsh", at which point most owners will end up playing the grand with the lid closed. Many homeowners ignore voicing entirely. The result is that such grands produce too much and too harsh sound, and are therefore played with the lid down. There is nothing technically wrong with playing a grand with the lid closed. However, some purists will express great dismay at such practice, and you are certainly throwing away something wonderful for which you made a significant investment. Performances at recitals almost always require the lid to be open. Therefore you should always practice with the lid open before a performance even if you normally practice with it closed. However, in a larger room, or in a recital hall, there is much less multiple reflection of the sound so that you do not hear the deafening roar that can result in a small room. A concert hall will absorb the sound from the piano so that, if you are accustomed to practicing in a small room, you will have difficulty hearing your own playing in a concert hall. Since uprights are essentially closed instruments, the neglect of voicing is less noticeable. Uprights also tend to be less expensive to maintain, mainly because expensive repairs are not worthwhile and are therefore not performed. Of course, there are quality uprights that are competitive with grands in feel and sound quality, but their number is small.
Among uprights, spinets are the smallest and generally the least expensive pianos; most do not produce satisfactory sound, even for students. The small height of spinets limits the string length, which is the main limitation on sound output. In theory, the treble should produce satisfactory sound (there is no limitation on string length even for spinets), but most spinets are weak in the treble because of poor quality of construction; therefore, be sure to test the higher notes if you are evaluating a spinet. Uprights larger than console size can be very good student pianos. Old uprights with poor sound are generally not salvageable, no matter what their size. At such an age, the value of the piano is less than the cost of restoring them; it is cheaper to buy a newer upright with satisfactory sound.