Sound-absorbing material – FILZ/2.8/1

The Intertechnik FILZ/2.8/1 sound-absorbing felt sheet is a purposeful solution for enhancing the acoustic performance of your loudspeaker enclosures. Designed to minimise unwanted cabinet resonances and tame mid-range reflections, this material ensures that your speaker build delivers a cleaner, more accurate sound. Whether you are constructing a new pair of bookshelf speakers, upgrading an existing hi-fi system, or fine-tuning a custom audio project, this felt sheet is an invaluable addition to your workshop.

This 2.8 mm thick felt is exceptionally easy to work with; it can be cut precisely with standard scissors or a craft knife and fitted neatly inside any enclosure. Its dense, fibrous structure effectively dampens internal standing waves and reduces colouration, allowing the driver to perform without interference from the cabinet. The material is particularly effective at absorbing mid-range frequencies, which are often responsible for muddying vocal clarity and instrument separation. Simply line the internal walls of your speaker box to achieve a noticeably tighter, more controlled bass response and a more open, natural mid-range.

Manufactured by Intertechnik, a trusted name in speaker components, this felt sheet offers reliable, long-lasting performance. It is a straightforward, cost-effective upgrade that can transform the character of your loudspeakers, making it an essential component for any serious DIY audio enthusiast.