Is it true that there are Bösendorfer grand pianos with more strings compared to other grand pianos?
There are two Bösendorfer models with more than 88 keys (7 3/4 octaves). One is the Imperial, with 97 keys, i.e., eight full octaves. The other is the model 225 grand piano, with four additional sub-bass keys that extend the bass range to bottom F. This expanded range requires both models to have more strings.
