haha!! yupI guess working as a mechanical designer in a manufacturing environment for 30+ years gets me zero credibility on this forum.
jeff
Jeff,
Nothing against your credibility bro... friendly discussion... 🙂
Post from Mr. Mark Audio himself:
https://www.diyaudio.com/community/threads/stevenzs-alpair-12p-build.215423/page-3#post-3092447
Nothing against your credibility bro... friendly discussion... 🙂
Post from Mr. Mark Audio himself:
https://www.diyaudio.com/community/threads/stevenzs-alpair-12p-build.215423/page-3#post-3092447
I was actually referring to the hex key size, not the nominal screw size, which is wrong in this context. So you're right, the larger MA drivers would have M4 wood screws. Apologies to everyone concerned.
I pulled a screw out of my 12p speakers, and they are indeed M4 nominal wood screw threads, but the hex key size is still 3mm, like the screws for the smaller MA drivers. The important part is the head size diameter, which is ~7mm. Anything bigger than this isn't going to work. As these screws are sort of a wood screw/ socket head cap screw hybrid, the head size could be different, might have a 4mm hex size (I'm guessing here).
So I have both sizes here. M4 x 20mm long (larger MA drivers), and M3 x 15mm long (smaller MA drivers like 4").
jeff
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Received a 30% off coupon in my email yesterday, so I picked up a 10 piece set (like above) from Harbor Freight for $5. 👍
Stefan has the details on his site as part of the Instructions section, along with various helpful construction tips for the flat-packs / pre-built boxes: https://kjfaudio.com/product/sl11-sd-standmount-kit-pair/
Per point 7/ if using Alpair 11MS or CHN-110, the duct does not need changing & can be used as-supplied. If using Pluvia 11, it should be cut down to 88mm total length.
Although they don't get much air-time, I'm actually rather pleased with how those kits turned out. 'Deceptively simple' is the phrase; they're quite flexible and offer a good amount of the performance of some of the more complex designs in a simple package.
Per point 7/ if using Alpair 11MS or CHN-110, the duct does not need changing & can be used as-supplied. If using Pluvia 11, it should be cut down to 88mm total length.
Although they don't get much air-time, I'm actually rather pleased with how those kits turned out. 'Deceptively simple' is the phrase; they're quite flexible and offer a good amount of the performance of some of the more complex designs in a simple package.