Roofing Felt Speaker Stuffing

Thick felt of the kind that used to be laid under carpets was a popular choice in the early days of hifi.

Roofing felt speaker stuffing.

The constrained layer of roofing felt reduces the peak vibration by almost 20 db and the average by about 10 db relative to the blue curve without a damping layer. Polyester fiber stuffing slows down sound waves inside the box making the subwoofer perform as if the box were bigger. Layers of 30 roofing felt that costs 0 17 per square foot thanks to dickason for mentioning this stuff. Full range speakers have acoustic wool stuffed into the box to remove energy due to friction as the air moves through the fibres.

50 50 wool polyester blend pillow found at walmart 4 x 4 x 3 8 or thicker carpet rebond. Use 1 to 1 1 2 pounds of stuffing per cubic foot of box volume. At 11mm thick it is suitable for damping the walls of a speaker cabinet to change the resonant frequency and q it is also effective at reducing the back wave from the rear of your drivers. 2 1 2 sheet rock screws.

The effectiveness of this approach diminishes as frequency is reduced. Description our heavy weight recycled wool felt is manufactured from 100 recycled fibres. In most regions it is better than the. What s in the box.

The sound wave coming off the back of your subwoofer reacts with the air contained in the box. Cup w binding posts madisound td cup.