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Old 17th August 2005, 08:39 AM   #11
bigwill is offline bigwill  United Kingdom
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They might arrive later today, I'll report what they're like
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Old 17th August 2005, 08:48 AM   #12
Nuuk is offline Nuuk  United Kingdom
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They might arrive later today, I'll report what they're like
Standing by Bigwill!
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Old 17th August 2005, 10:32 AM   #13
Colin is offline Colin  United Kingdom
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>The only commercial design that I know of was the one using a single Jordan driver and no crossover. I would love to have heard those although I know they lacked bass!

Hi Nuuk

I've heard these and they sounded very clean. Limited in the bass (but then they were using the JX92 in only 3 or 4 litres, so it would roll off below 100Hz anyway). I prefered them to the same driver in a traditional MDF box, which sounded slow and woolly by comparison.

Wharfedale produced some designs in the 80s which used polystyrene skinned with formica. Never took off, as far as I know.

I've also heard RA's implementation of his idea using Torlyte. Again, very clean sound at high volumes and disconcertingly light when you moved the boxes around. A pair of my enclosures use his chipboard and insulation board construction method.

There is a silver foil-covered building insulation board which is available up to 3" thick which looks like it would not be difficult to work with. (This could be the subject of a whole new thread.)

Colin
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Old 17th August 2005, 10:40 AM   #14
Nuuk is offline Nuuk  United Kingdom
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A pair of my enclosures use his chipboard and insulation board construction method.
As do my current IPL A2 enclosures!

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There is a silver foil-covered building insulation board which is available up to 3" thick which looks like it would not be difficult to work with. (This could be the subject of a whole new thread.)
And you can buy foam of different density too! It is made primarily for the mock-up industry, eg for making a model of a product for display purposes, or making a design like a car, just to see what it looks like.

Somebody kindly sent me some samples of this stuff and it is a lot more robust than the building type that we have used so far. You can even screw into it! It's more expensive though and I am still looking for an outlet where you do not have to order in bulk quantities (unless we can convert everybody and do a group buy)!
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Old 17th August 2005, 03:12 PM   #15
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Originally posted by Colin
>There is a silver foil-covered building insulation board which is available up to 3" thick which looks like it would not be difficult to work with. (This could be the subject of a whole new thread.)

Colin
Perhaps you missed the "my Fostex FE108 Sigma Project" thread. It's probably back five or six pages by now. I thoroughly reveal my ignorance, but there are lots of pictures. I've already built five prototypes out of that very same foam (1/2 inch, though). In my last prototype, I used a piece of 4 inch PVC pipe for the compression chamber. I just wish I could get someone else to listen to these. I'm not sure I can trust my judgment, given the "it's my baby" syndrome.

Doug
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Old 17th August 2005, 03:23 PM   #16
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Originally posted by Taperwood


Perhaps you missed the "my Fostex FE108 Sigma Project" thread. It's probably back five or six pages by now. I thoroughly reveal my ignorance, but there are lots of pictures. I've already built five prototypes out of that very same foam (1/2 inch, though). In my last prototype, I used a piece of 4 inch PVC pipe for the compression chamber. I just wish I could get someone else to listen to these. I'm not sure I can trust my judgment, given the "it's my baby" syndrome.

Doug
Question: do you like the sound?
If your answer is yes, who cares what other people think? We all like different things anyway. That's the hard-nosed reply. But then again... I know the feeling. It's nice to have other views too. When I stuffed my Tannoy Golds into an 8 foot Voigt pipe (before I knew any better), I loved the sound right up until I measured it. Then, just to clinch things, a friend asked very sweetly why she couldn't hear several voices she'd heard before on the recording though a cheap pair of Wharfdales.
For what it's worth though, I still reckon, if it's the X-baffles you built (?) you're onto something good with those.
Cheers
Scott
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Old 17th August 2005, 03:43 PM   #17
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Oh yeah, Scott, I love the sound, but as you pointed out, it was a friend who clinched it for you that something was not quite right. My wife is no help. She listens for five seconds when I AB for her, says "that one," and walks out of the room. Anyway...

Yes, I'm still futzing around with the X-baffles. Prototype #3 is still my best effort, but #5 reveals more clarity in the mid-range at the expense of bass extension, losing quite a bit below 100hz.

And I apologize for completely hijacking this thread.

Doug
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Old 17th August 2005, 06:25 PM   #18
bigwill is offline bigwill  United Kingdom
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The speakers will now arrive tommorow, since the delivery man failed to knock on the door or anything when he arrived today (just as I realised he was outside and rushed to the door he drove off!)
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Old 17th August 2005, 08:32 PM   #19
Nuuk is offline Nuuk  United Kingdom
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The speakers will now arrive tommorow, since the delivery man failed to knock on the door or anything when he arrived today (just as I realised he was outside and rushed to the door he drove off!)
Don't you just hate that and why do they do it? They only have to come back again!
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Old 17th August 2005, 09:51 PM   #20
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Originally posted by Nuuk


As do my current IPL A2 enclosures!



And you can buy foam of different density too! It is made primarily for the mock-up industry, eg for making a model of a product for display purposes, or making a design like a car, just to see what it looks like.

Somebody kindly sent me some samples of this stuff and it is a lot more robust than the building type that we have used so far. You can even screw into it! It's more expensive though and I am still looking for an outlet where you do not have to order in bulk quantities (unless we can convert everybody and do a group buy)!
The other day I saw some material that was 1/4in ply faced (both sides) with about an inch of pink polystrene foam in between, it even had intermittent glued? 1/16 inch wood running from the front ply to the rear ply segmenting the foam into cells. I have no Idea what it is used for...a sample was at the UT Austin materials lab. It looked expensive.... I lusted appropriately.

Sean


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