Roofing Felt Speaker Stuffing

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Roofing felt speaker stuffing.

The sound wave coming off the back of your subwoofer reacts with the air contained in the box. 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. Thick felt of the kind that used to be laid under carpets was a popular choice in the early days of hifi. What s in the box.

Glass fibre insulation material was irritatingly used for much of the 60s while polyester or acrylic fibre similar to that found in cheap sleeping bags duvets or pillows gained popularity in the 70s either inserted loose or stapled. 6 heavy zip cord 12 gauge or heavier radio shack has heavy speaker wire which works well 1 pkg. 2 1 2 sheet rock screws. 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.

In most regions it is better than the. Description our heavy weight recycled wool felt is manufactured from 100 recycled fibres. Full range speakers have acoustic wool stuffed into the box to remove energy due to friction as the air moves through the fibres. The effectiveness of this approach diminishes as frequency is reduced.

Use 1 to 1 1 2 pounds of stuffing per cubic foot of box volume. By the time we get below 300hz the stuffing is basically useless.