Clavichords are not. Virginals are plucked like harpsichords, but are strung laterally. Spinets are also plucked and have a sort of triangular shape. A clavichord is a sensitive, soft toned keyboard instrument. When you press a clavichord key, a metal tangent hits the string from below, creating sound.
Variable pressure causes vibrato.
This Flemish double manual harpsichord after Ruckers has a disposition of 2 X 8' X 4' and buff. A repeating graphic motif around the keyboard was created with the use of specially printed paper. Disposition describes your hardware layout. A 4 foot stop sounds an octave higher. Next All instrument photos generously provided by Marc Ducornet.