Ted Todd | Amphion Acoustic Underlay 15.07m2Amphion Acoustic Underlay is a high performance 5mm rubber sponge underlay designed to deliver outstanding sound insulation. With an impressive 28dB noise reduction, its ideal for environments where acoustic performance is key. Key Features 28dB Sound Reduction: Exceptionally high noise barrier performance Heavy Contract Use: 542kg m density for durability in high traffic areas Textron Backing: Ensures dimensional stability for secure, long term