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Thread: Researching beater cabs available for cheap builds

  1. #36
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    Quote Originally Posted by Steve A. View Post
    Sound Barrier Sheathing...
    Huh?!?
    Back in post 14, Leo_Gnardo said that old Silvertone amp cabs were made of Homasote, AKA Beaverboard.

    Wikipedia sez this:
    Homasote is a brand name associated with the product generically known as cellulose based fiber wall board...
    And this:
    Beaverboard is a fiberboard building material, formed of wood fibre compressed into sheet...

    Homasote's site says this:
    440 SoundBarrierŽ is a special-density, structural board made from 100 percent environmental HomasoteŽ cellulose fiber...

    Relying on those descriptions, we can surmise that, despite the purpose for which 440 SoundBarrier is marketed, it definitely may or may not be the same material used to build Silvertone cabinets.

    I'm asking if anyone knows whether or not 440 SoundBarrier is the same material used to build Silvertone cabinets.
    And whether that material can be used for speaker baffles.

    -rb

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    Last edited by rjb; 05-13-2018 at 11:38 PM.
    DON'T FEED THE TROLLS!

  2. #37
    Old Timer Leo_Gnardo's Avatar
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    Quote Originally Posted by rjb View Post
    Back in post 14, Leo_Gnardo said that old Silvertone amp cabs were made of Homasote, AKA Beaverboard.
    Yes I remember that. Perhaps there are new developments on the homasote front since 50-60 years ago. Sound absorbing qualities for instance. If you're planning on building a cab with a 5 year horizon like Dan-o did back than, you might consider it. And you can use some crappy masonite for baffles if you don't plan on mounting anything but the lightest duty speakers.

    I think besides obvious cheapness, another attraction for homasote back then was, you could run a couple parallel saw cuts then bend it "around the corner" saving some cleat wood and of course production time. It's more or less a miracle any of those old amps are still around. I sure wouldn't advise standing on one. And as far as being vermin proof, I can say I've witnessed lots of homasote-box amps that have served as fine homes for mice, rats and various insects. Seems they're more distracted by having nearby wires to chew on and tend to leave the homasote alone. If that's a concern...

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  3. #38
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    I have an old Silvertone 1481.
    Here's a shot of the inside.
    Yes... I call this amp "Bruce".

    I did make a plywood baffle for it, the masonite baffle was quite bad, left the rest of it alone.

    Last 2 pics are of how the amp came to me.
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  4. #39
    Bent Member Chuck H's Avatar
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    Quote Originally Posted by Enzo View Post
    A good question. To me the stuff in the photo looks like pressed sawdust. What I call chip board - perhaps incorrectly - is the stuff that looks like large flakes of wood, like an inch or two or three across, all hunked together to form a sheet.

    what I call chip board:
    Attachment 44982
    That "chipboard" stuff is called OSB (oriented strand board) and is made from thin sheets of wood flakes laminated together like plywood. It's not suitable for cabinet making, though THAT may not keep some manufacturer from doing it. "Particle board" comes in a few different densities, with the denser product used by cabinet makers usually being MDF (medium density fiberboard). The same stuff they make pre finished trim boards out of. The sawdust looking stuff is LDF (large density fiberboard) and is the cheaper (but slightly lighter) of the two, though it makes little difference to the cabinet.

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    "Never bet your life on somebody else doing their job." SoulFetish's good friend

    "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

    "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A

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  5. #40
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    Quote Originally Posted by Chuck H View Post
    ................ is called OSB (oriented strand board) and is made from thin sheets of wood flakes laminated together like plywood. .....................

    Should be called DIS-oriented strand board.

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  6. #41
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    Back in the 80's, I built my PA cabinets from OSB, I got the idea from some EV monitors I had. The main problem is their weight! They are dense, and I suppose airtight.
    Here's one:
    Click image for larger version. 

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