A. J. Hipkins, A Dictionary of Music and Musicians (1900)
“ RUCKERS, clavecin makers of Antwerp, who were working as masters between 1579 and 1667 or later, the first of whom, Hans Ruckers, is always credited with great improvements in keyboard instruments. It is certain that the tone of the Ruckers clavecins has never been surpassed for purity and beauty of tone-colour (timbre) ; and from this quality they remained in use in England, as well as in France and the Netherlands, until harpsichords and spinets were superseded, at the end of last century, by the pianoforte. ”
