Paradigm states that "these Ultra-Rigid chassis and mounting brackets strengthen the wall around the mounting hole which helps to improve sound quality".
The Reference SA-35 is the largest speaker in the SA Series and features a pure aluminum dome high-frequency driver, high-temperature voice coil with ventilated aluminum fomer, ferro-fluid cooling and damping with an over sized magnet. One 8" midrange bass driver has mica-loaded polymer cone assemblies while an additional 8" bass driver has a mineral filled polypropylene cone. All drivers have high-temperature multi layer 1-1/2" voice coils, Apical fomers, high hysteresis progressively damped synthetic butyl suspension and over sized magnets.