Why is the ELS SUB so heavy?
To prevent unwanted noises from being generated by the cabinet, Epos has designed the ELS Sub to have 25mm (1″) thick MDF walls, which are covered in a PVC vinyl laminate. Inside the enclosure, there is a significant amount of bracing which acts to strengthen the cabinet and prevent it from flexing under extreme pressure, caused by the low frequencies it produces. In addition, the ELS Sub is unusual, at its price range, for having a separate, sealed, cavity for the amplifier and filter circuit to live. This reduces the physical stress on the amplifier which improves the isolation from low frequency air pressure interfering with the circuitry and causing what is called microphony. In addition, it helps to avoid rattles and buzzes coming from the amplifier components.
