ClearSonic IsoPacs are our most popular isolation packages, and can easily be modified to fit your specific needs. IsoPacs A, B, E, F, G, and H feature the ClearSonic Lid System, that helps reduce the amount of sound that would normally escape upwards. IsoPacs C and D are for applications where the lid is not necessary, but still feature SORBER absorption baffles to control the reflected sound. IsoPacs E through H can be used for a variety of applications including vocal and voice-over work. The rear panels are usually not attached to the front panels. They simply butt together or overlap a bit. An access "door" panel is created at the overlap location.