Jei palyginus senojo swr parodymus su swx tai jie kaip ir panasus i realius:

SWR-1241D
Displacement (front mount) 0.128 cu.ft.(~3,62l)
Added Volume (reverse mount) 0.073 cu.ft. (~2.06l)

SWX-1242D
Displacement (front mount) 0.194 cu.ft.(~5,5l)
Added Volume (reverse mount)0.079 cu.ft.(~2.5L)