The sound enclosure reduces the noise for quieter blending.
The motor housing comes with sound dampening foam and sound blocks.
These parts fit the Space Saver 825, Connoisseur 825 (previously know as Q-Series.) as well as the household Professional 750
All parts also fit the Space Saver 825.
Please note that if you want to upgrade from Space Saver 825 to Connoisseur 825, both the sound enclosure and the motor enclosure are needed, unless you want to use it in-counter rather than free-standing.