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cheap refoam loudspeaker kit?

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Anonymous
August 12, 2004 7:51:04 PM

Archived from groups: rec.audio.tech (More info?)

Is there a cheap refoam loudspeaker kit?
Most are $25 for 2 pieces of foam.
Seems like foam should be 5 cents each.

Isn't this the same type of foam on
some brands dry cleaning hangers?
Anybody found a foam substitute.
Otherwise, another 10 year old loudspeaker into
the trash.

Any glue suggestions???

Thanks,
J
Anonymous
August 13, 2004 3:22:07 AM

Archived from groups: rec.audio.tech (More info?)

"J F" <j1234f@excite.com> wrote in message
news:67055fe3.0408121451.459455ee@posting.google.com...
> Is there a cheap refoam loudspeaker kit?
> Most are $25 for 2 pieces of foam.
> Seems like foam should be 5 cents each.
>
> Isn't this the same type of foam on
> some brands dry cleaning hangers?
> Anybody found a foam substitute.
> Otherwise, another 10 year old loudspeaker into
> the trash.
>
> Any glue suggestions???
>
> Thanks,
> J

Dunno what specific foam you're needing BUT........

I've built many a speaker... Stuffed them with everything from builders foam
to hollowfill fibre out of a pillow!

If it's white sorta-hard cotton-wool type stuff it's most probably
hollowfill; You need a drapery store; take them a sample, ask wot they got!
the ladies will look bemused but should help.... A lot of 'specialist'
products are actually common materials dressed up! And priced accordingly!
Anonymous
August 13, 2004 3:22:08 AM

Archived from groups: rec.audio.tech (More info?)

On Thu, 12 Aug 2004 23:22:07 +0000 (UTC), "LaoFuZhi" <the.real.address
..is@mattATtfgtvDOTcoDOTyewkay.itsaspam thing.not.too.hard.to.work.out> wrote:

>
>"J F" <j1234f@excite.com> wrote in message
>news:67055fe3.0408121451.459455ee@posting.google.com...
>> Is there a cheap refoam loudspeaker kit?
>> Most are $25 for 2 pieces of foam.
>> Seems like foam should be 5 cents each.
>>
>> Isn't this the same type of foam on
>> some brands dry cleaning hangers?
>> Anybody found a foam substitute.
>> Otherwise, another 10 year old loudspeaker into
>> the trash.
>>
>> Any glue suggestions???
>>
>> Thanks,
>> J
>
>Dunno what specific foam you're needing BUT........
>
>I've built many a speaker... Stuffed them with everything from builders foam
>to hollowfill fibre out of a pillow!
>
>If it's white sorta-hard cotton-wool type stuff it's most probably
>hollowfill; You need a drapery store; take them a sample, ask wot they got!
>the ladies will look bemused but should help.... A lot of 'specialist'
>products are actually common materials dressed up! And priced accordingly!
>

He is talking about the foam surround rings hence the word "refoam" in the
title. Here in Toronto they sell for few bucks each.




Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs http://www3.sympatico.ca/borism/
Related resources
Anonymous
August 13, 2004 7:41:11 AM

Archived from groups: rec.audio.tech (More info?)

I guess the poster meant the suspension foam around the cone, not the cavity
fill within a speaker box.


"LaoFuZhi" <the.real.address .is@mattATtfgtvDOTcoDOTyewkay.itsaspam
thing.not.too.hard.to.work.out> wrote in message
news:cfgu2v$9pv$1@sparta.btinternet.com...
>
> "J F" <j1234f@excite.com> wrote in message
> news:67055fe3.0408121451.459455ee@posting.google.com...
> > Is there a cheap refoam loudspeaker kit?
> > Most are $25 for 2 pieces of foam.
> > Seems like foam should be 5 cents each.
> >
> > Isn't this the same type of foam on
> > some brands dry cleaning hangers?
> > Anybody found a foam substitute.
> > Otherwise, another 10 year old loudspeaker into
> > the trash.
> >
> > Any glue suggestions???
> >
> > Thanks,
> > J
>
> Dunno what specific foam you're needing BUT........
>
> I've built many a speaker... Stuffed them with everything from builders
foam
> to hollowfill fibre out of a pillow!
>
> If it's white sorta-hard cotton-wool type stuff it's most probably
> hollowfill; You need a drapery store; take them a sample, ask wot they
got!
> the ladies will look bemused but should help.... A lot of 'specialist'
> products are actually common materials dressed up! And priced accordingly!
>
>
Anonymous
August 13, 2004 7:23:45 PM

Archived from groups: rec.audio.tech (More info?)

You are right, suspension foam which keeps the speaker
going straight in and out.
Is there any cheap substitute?
I only found one place on the internet and
they sell for $25 for fixing 2 speakers:

<http://www.partsexpress.com/Tech/260-915.html&gt;


"nntp" <renora@rogers.com> wrote in message news:<rLWSc.383548$rCA1.289542@news01.bloor.is.net.cable.rogers.com>...
> I guess the poster meant the suspension foam around the cone, not the cavity
> fill within a speaker box.
Anonymous
August 14, 2004 5:29:59 PM

Archived from groups: rec.audio.tech (More info?)

> He is talking about the foam surround rings hence the word "refoam" in
the
> title. Here in Toronto they sell for few bucks each.

Countries divided by a common language ;-).....

Here in Scotland a loudspeaker is generally a complete unit in a box; and
the foam goes inside the box.... What you call a loudspeaker I'd call a
drive Unit; Woofer, tweeter or midrange... If someone used the word
loudspeaker to me, in reference to something like a drive unit I'd assume we
were talking about a cheap full-range item such as you might find in a TV or
portable radio.... Which I'd just replace and would never think of
repairing unless it was some vintage item!

A quality drive unit with damaged suspension would either get returned to
it's maker or fitted with a proper kit made for the unit... A cheap one;
we'd bin it! I don't think I've ever actually seen foam surrounds on sale
here! But then I'd never have thought to look....
Anonymous
August 14, 2004 11:54:58 PM

Archived from groups: rec.audio.tech (More info?)

J F wrote:
> You are right, suspension foam which keeps the speaker
> going straight in and out.
> Is there any cheap substitute?
> I only found one place on the internet and
> they sell for $25 for fixing 2 speakers:
>
> <http://www.partsexpress.com/Tech/260-915.html&gt;
>
>
> "nntp" <renora@rogers.com> wrote in message
> news:<rLWSc.383548$rCA1.289542@news01.bloor.is.net.cable.rogers.com>...
>> I guess the poster meant the suspension foam around the cone, not
>> the cavity fill within a speaker box.

Are your 2 speakers not worth the $25 ?

geoff
Anonymous
August 15, 2004 2:49:46 PM

Archived from groups: rec.audio.tech (More info?)

LaoFuZhi wrote:
>> He is talking about the foam surround rings hence the word "refoam"
>> in the title. Here in Toronto they sell for few bucks each.
>
> Countries divided by a common language ;-).....

No, more people divided by imprecise terminology.


> Here in Scotland a loudspeaker is generally a complete unit in a box;
> and the foam goes inside the box.... What you call a loudspeaker I'd
> call a drive Unit; Woofer, tweeter or midrange... If someone used
> the word loudspeaker to me, in reference to something like a drive
> unit I'd assume we were talking about a cheap full-range item such as
> you might find in a TV or portable radio.... Which I'd just
> replace and would never think of repairing unless it was some vintage
> item!

So you've got most of it right. Just the the term 'foam' in relation to
loudspeakers would normally be taken to mean foamed plastic speaker cone
suspension. Worldwide.

Loudspeaker - a whole device complete with cabinet, drivers, cross-over and
stuffing material.
This stuffing material could be polyester fibre, glass-fibre, wool, or even
polyurethane foam.

geoff
Anonymous
August 15, 2004 3:23:38 PM

Archived from groups: rec.audio.tech (More info?)

> So you've got most of it right. Just the the term 'foam' in relation to
> loudspeakers would normally be taken to mean foamed plastic speaker cone
> suspension. Worldwide.

Strange; I ran this buy some of the guys in work and they all thought foam;
goes inside the box.......
Anonymous
August 18, 2004 8:32:29 AM

Archived from groups: rec.audio.tech (More info?)

I am from Toronto and looking for a speaker supply store to fix my Infinity.
Where in Toronto do they sell these surround foams?

"LaoFuZhi" <the.real.address .is@mattATtfgtvDOTcoDOTyewkay.itsaspam
thing.not.too.hard.to.work.out> wrote in message
news:cfl44m$t04$1@hercules.btinternet.com...
>
> > He is talking about the foam surround rings hence the word "refoam" in
> the
> > title. Here in Toronto they sell for few bucks each.
>
> Countries divided by a common language ;-).....
>
> Here in Scotland a loudspeaker is generally a complete unit in a box; and
> the foam goes inside the box.... What you call a loudspeaker I'd call a
> drive Unit; Woofer, tweeter or midrange... If someone used the word
> loudspeaker to me, in reference to something like a drive unit I'd assume
we
> were talking about a cheap full-range item such as you might find in a TV
or
> portable radio.... Which I'd just replace and would never think of
> repairing unless it was some vintage item!
>
> A quality drive unit with damaged suspension would either get returned to
> it's maker or fitted with a proper kit made for the unit... A cheap one;
> we'd bin it! I don't think I've ever actually seen foam surrounds on
sale
> here! But then I'd never have thought to look....
>
>
Anonymous
August 18, 2004 12:28:02 PM

Archived from groups: rec.audio.tech (More info?)

On Wed, 18 Aug 2004 04:32:29 GMT, "nntp" <renora@rogers.com> wrote:

>I am from Toronto and looking for a speaker supply store to fix my Infinity.
>Where in Toronto do they sell these surround foams?

Active Surplus 347 Queen Street West.(new location - upstairs)

They also have adhesive.



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs http://www3.sympatico.ca/borism/
Anonymous
September 20, 2009 10:18:48 PM

Quote:
Archived from groups: rec.audio.tech (More info?)

LaoFuZhi wrote:
> Countries divided by a common language ;-).....

No, more people divided by imprecise terminology.

> Here in Scotland a loudspeaker is generally a complete unit in a box;
> and the foam goes inside the box.... What you call a loudspeaker I'd
> call a drive Unit; Woofer, tweeter or midrange... If someone used
> the word loudspeaker to me, in reference to something like a drive
> unit I'd assume we were talking about a cheap full-range item such as
> you might find in a TV or portable radio.... Which I'd just
> replace and would never think of repairing unless it was some vintage
> item!

So you've got most of it right. Just the the term 'foam' in relation to loudspeakers would normally be taken to mean foamed plastic speaker cone suspension. Worldwide.

Loudspeaker - a whole device complete with cabinet, drivers, cross-over and stuffing material. This stuffing material could be polyester fibre, glass-fibre, wool, or even polyurethane foam.

geoff


I have been in the audio/visual industry for a while (30+ years), and you're almost right. The terms are indeed universal worldwide:

Loudspeaker: The whole assembly: drivers, crossovers, cabinet, so on. Normally people just shorten this to "speaker".

Cabinet: the speaker's cabinet or housing, including mounts, connectors, insulation, and so on

Enclosure: just the physical unit that the speaker drivers mount in.

Driver: (not "drive unit"!) the actual electronic/magnetic coil assembly and the transducer surface that actually creates the pressure waves of sound. This surface can be a cone (paper, plastic or metal), ceramic (in piezoelectric transducers), glass, and other materials and shapes. Most cone-shaped drivers have foam rubber or paper suspension to maintain the coil centered in the magnet and allow the cone to move front and back. It is this suspension material that is subject to the most stress, and with environmental conditions that cause drying and out-gassing of rubber and oil compounds that maintain flexibility and adhesion, is usually the first part to fail. The cone is usually the second part to fail, mostly due to applying too much current to the coil and the cone not able to react fast enough or far enough to the demand and tearing or shredding. "Refoaming" is the act of replacing this suspension with a new one.

Insulation: the sound baffling material (not "stuffing"!) that is used to prevent the enclosure's resonant frequencies from interfering with the reproduced sound. When you add or replace the insulation material, you are "reinsulating" the enclosure.

Baffles: structures in the enclosure the channel the sound and prevent interference overtones fom developing

Ports: A cabinet is usually sealed air-tight. A Port is used to exhaust sound waves of certain frequencies to both help reinforce the front-projected sound and to allow drivers to move further and thus move more air to reproduce lower frequencies and louder sounds without distortion cause by high pressure builtup in the enclosure during the compression phase of a driver's movement.

I can't think of any other misused or confusing terms right now, but there are other parts that go into the makeup of a loudspeaker.
!