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Loudspeaker Damping Materials
Below is a selection of common loudspeaker damping materials used to aid the suppression of unwanted
cabinet resonances and to modify the voice of a speaker cabinet / enclosure.
Long haired sheeps wool, wool felts and similar materials such as (Bonded Acetate Fibre, BAF)
are primarily used to alter the higher frequency voicing of cabinets and are favourite stuffings for many cabinet
designs including transmission line enclosures.
Acoustic Foams and sheeps wool damping felts are better targeted at the mid-range
frequencies / resonances as their density / mass is higher and they have differing absorption characteristics.
These materials are usually attached to the inner cabinet walls.
Bitumastic sheet which has a high density, a self adhesive backing and available
in various thicknesses can be applied to inner cabinet walls to increase the panel weight / mass. This lowers the panel
resonance and the bitumastic, by adsorption, helps reduce unwanted panel vibration.
Sound Absorbent Foam.
Used for Loudspeaker cabinet damping, this sound absorbent
foam is an ideal contender for damping the higher frequencies in
speaker enclosures. Coloured grey, it has a closed cell
construction, is easy to bend / fit into a variety of loudspeaker
enclosures and may be cut to shape using a sharp scalpel. This sound
absorbent foam provides a cost-effective and clean method of
installing speaker enclosure damping to your home project. Nominal
thickness 16mm. Supplied in rolled sheet format, 550mm * 1200mm = 1 piece.
* Sound Absorbent Loudspeaker Damping Foam.
||Sound Absorbent Foam 550*1200*16
* Sheeps Wool
Long Haired Herdwick Sheeps Wool
Genuine British, scoured Herdwick, Long Haired, Sheeps Wool. Cleaned and washed, but not
mothproofed, this is the upgrade to polyfill and other synthetic type cabinet fillings. Ideal for stuffing your loudspeaker cabinets and
ideally suited for transmission line stuffing. Available in 250gm and 500gm packs. As a general guide,
250gms of wool stuffing will be sufficient per 1 cubic foot of stuffed volume
or 28L, whichever you like. Of course you can use more or less as required.
* Long Haired Wool for Damping Loudspeaker Enclosures.
||Scoured Herdwick Wool, 250gms Pack
||Scoured Herdwick Wool, 500gms Pack
* Sheeps Wool Felt
100% Herdwick Sheeps Wool Felt.
Loudspeaker damping felts. This felt is 100% pure Herdwick Sheeps Wool,
needled on a jute thread mat. Supplied in 3 different felt weights of 35oz, 42oz and 48oz per
square yard, (subject to availability). As an approximate guide to thickness, this equates roughly to
(12, 13, 16)mm. uncompressed, as it expands slightly with use / flexure. The thickness can, however,
vary a little depending upon the needling density as it is manufactured to weight,
not thickness. This material provides an improved quality over recycled wool / cotton felts.
* Sheeps Wool Felt for Loudspeaker Damping. 12mm /35oz./ sq yd.
||Pure Wool Sound Absorbent Felt 300*685*12
||Pure Wool Sound Absorbent Felt 300*1370*12
||Pure Wool Sound Absorbent Felt 500*1370*12
* Sheeps Wool Felt for Loudspeaker Damping. 13mm /42oz./ sq yd.
||Pure Wool Sound Absorbent Felt 300*685*13
||Pure Wool Sound Absorbent Felt 300*1370*13
||Pure Wool Sound Absorbent Felt 500*1370*13
* Sheeps Wool Felt for Loudspeaker Damping. 16mm /48oz / sq yd.
||Pure Wool Sound Absorbent Felt 300*685*16
||Pure Wool Sound Absorbent Felt 300*1370*16
||Pure Wool Sound Absorbent Felt 500*1370*16
* Wool &Cotton Mix Felt
Sound Absorbent Felt - Wool and Cotton Mix.
Used for damping the internal resonances and reflections
in loudspeaker enclosures. This speaker felt is of a mat wool and
composite material construction, 80% recycled wool, 20% cotton mix. The sound absorbent felt is
supplied in two material weights 1700gms or 1100gms per square
metre. Nominal thickness is 10mm or 7.5mm uncompressed. Supplied in
rolled / sheet format. See below for sizes.
* Sound Absorbent Felt - Wool and Cotton Mix. 10mm Thickness.
||Sound Absorbent Felt 300*700*10
||Sound Absorbent Felt 300*1400*10
||Sound Absorbent Felt 500*1400*10
* Sound Absorbent Felt - Wool and Cotton Mix. 7.5mm Thickness.
||Sound Absorbent Felt 300*700*7.5
||Sound Absorbent Felt 300*1400*7.5
||Sound Absorbent Felt 500*1400*7.5
* Felt Damping
Felt Damping Coins & Strip.
A heavyweight hard cotton / wool felt available in felt
strips of (30 * 150 * 10)mm and which may be cut to size or
shape. Also available as felt coins 25mm diameter by 7.5mm
thick. The material is used to dampen unwanted mechanical
vibration. Ideal for speaker stand platforms or beneath
equipment. Non adhesive backed.
* Cotton & Wool Felt Damping Strip & Coins.
||Felt Damping Strip 30 * 150 *10
||Felt Damping Coins 25 Diam * 7.5
* Bitumastic Damping
Bitumastic Damping Sheet
A heavy grade self adhesive backed Bitumastic damping
sheet used for sound deadening. Now available in 3 weight
options. Sheets / pads of (600, 300 or 150)gms per sheet, The sheets are
all (200 by 300)mm and are used for quietening down resonant
panels. The adhesive provides good material coupling to wood panels.
For extra security it is recommended the sheets are tacked / nailed
into place as this will prevent creep or failure / detachment in hot
weather. See our ARTICLE about Using Bitumastic Damping.
* Bitumastic Sheet for Loudspeaker Damping.
||Bitumastic Damping Sheet 200 * 300 * 5
||Bitumastic Damping Sheet 200 * 300 * 2.5
||Bitumastic Damping Sheet 200 * 300 * 1.5
For Postal Samples of Bitumastic Damping Sheet (DAMPSHT1),
(DAMPSHT2) or (DAMPSHT3) please enclose four (4) First Class Stamps in an envelope
along with your name and UK address. Sample size (100 * 50)mm.
Larger sizes are available for customer collection only
in the following sizes. For best results this material should be
transported and stored flat.
* Bitumastic Sheet, (Larger Sizes), for Loudspeaker Damping.
||Bitumastic Damping Sheet 300 * 1000 * 5
||Bitumastic Damping Sheet 600 * 1000 * 5
See BUY IT for Further Information.
All Prices include VAT @ 20%.