LDR-A is a sound attenuator for rectangular inline devices. It is intended for installation in ducts and structurally prepared channels for sound attenuation machinery.

LDR-A consists of a frame and attenuation inserts. The frame is manufactured from galvanized steel. The inserts are manufactured from mineral wool and are partially enclosed in perforated steel cover.

This sound attenuator has been designed to be compatible with our rectangular air volume control dampers, specifically NOTUS-S, TUNE-S and the entire OPTIMA-S range.