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Willing to help a total newbie with assembly tips for Fostex horn kit?
Willing to help a total newbie with assembly tips for Fostex horn kit?
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Old 15th May 2020, 06:14 AM   #11
planet10 is offline planet10  Canada
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Willing to help a total newbie with assembly tips for Fostex horn kit?
Quote:
Originally Posted by canonken View Post
...more aggressive way to apply pressure at the corners vs. a 'regular' clamp.
You do not want to apply too much pressure.

dave
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Old 15th May 2020, 01:18 PM   #12
canonken is offline canonken  United States
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Quote:
Originally Posted by planet10 View Post
You do not want to apply too much pressure.

dave
Thanks. Snug, but not death grip, just enough to close any gap that's there.

BTW I hope you at least get a royalty!
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Old 15th May 2020, 01:20 PM   #13
canonken is offline canonken  United States
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Quote:
Originally Posted by AllenB View Post
I see them as capable of spanning the long dimension, and able to lay on their back like train tracks with the box sitting on them, or anything you need.

I don't know about the corners like that, if you need to clamp across the cabinet to attach the long sides to the back for instance, it is better to use a solid 2x4 to distribute the clamping force along its length, and use the clamps at the quarter way points, or just use more of them.
Not really, just making sure.
Oh, fair enough. It's just that rounding has multiple purposes and I just assumed.
Makes sense, thanks. I want to avoid the clamp itself touching the cabinet, just to protect the wood (cosmetically, know it would be able to handle it, but want to avoid dips in the surface).
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Old 15th May 2020, 01:34 PM   #14
canonken is offline canonken  United States
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Dave - safe to say you suggest I do NOT use T-nuts or any sort of threaded insert for this build? As long as I pre-drill the holes and don't over-tighten, just use the screws right into the cabinet? You and others here know better than me! Reality is unless I am playing with the stuffing (more/less than the 1.5 oz. the instructions suggest), I would never remove the drivers unless I was moving them to another cabinet or replacing one I blew.

Thanks!
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Old 15th May 2020, 02:13 PM   #15
AllenB is offline AllenB  Australia
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Willing to help a total newbie with assembly tips for Fostex horn kit?
You talk of pilot holes for the screws. This is something I consider mandatory for hardwood, and normal would be the diameter of the screw shank.. But with soft wood don't overdo it. Normally though if you screw straight into the mdf it piles up underneath the head. The driver mounting surface might want to sit on the hills around the screws. Alternative things you can do are to countersink before you screw, or remove the screw and use a chisel or razor in existing cases.

How you mount the driver makes a difference. Vibrations can be coupled into the cabinet walls. This may be via the mounting surface or the screws/bolts. Don't overtighten them. Use hand torquing procedures.
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Old 15th May 2020, 02:33 PM   #16
planet10 is offline planet10  Canada
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Willing to help a total newbie with assembly tips for Fostex horn kit?
Quote:
Originally Posted by canonken View Post
BTW I hope you at least get a royalty!
???

dave
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Old 15th May 2020, 02:41 PM   #17
planet10 is offline planet10  Canada
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Willing to help a total newbie with assembly tips for Fostex horn kit?
Quote:
Originally Posted by canonken View Post
...or any sort of threaded insert for this build?
Threaded inserts are good if you can properly install them. Chris (who built most of our builds) had access to a special tool to install them.

Quote:
As long as I pre-drill the holes and don't over-tighten, just use the screws right into the cabinet?
Usually. The do not overtighten is important for best sonic performance. They should only be so tight as to hold a real or imaginary washer from spinning. The screws that come with the Fostex have washers, the nicer hex head ones that come with Mark Audios do not.

I would often substitute brass screws (w washers), if you try to tighen them up too much the head comes off and it can become difficult to fix that.


Quote:
Reality is unless I am playing with the stuffing … I would never remove the drivers...
We did that alot, and almost always used screws, not bolts. No problems.

dave
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Old 15th May 2020, 10:19 PM   #18
canonken is offline canonken  United States
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Thanks Dave.

My comment was your were specifically called out on the Madisound product page, assumed it was you/your product (I know it is Madisound selling, but called out as your design).

Got it on the screws. Makes sense. Is there a specific brass screw you suggest?

However I just checked and the Foxtex washers fit on the Madisound hex screws. So if I am overthinking all of this, I can just use that pairing.

Appreciate the help everyone!
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Old 16th May 2020, 12:36 AM   #19
planet10 is offline planet10  Canada
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Scott’s design work (Woden design/scottmoose), my drawings. We got a couple pair of A7s for the work which we were happy to do without any payment (the arrival of the drivers was a surprise). I EnABLed both pairs and sent one pair to Scott.

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