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Old 5th October 2015, 10:01 PM   #11
planet10 is offline planet10  Canada
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Speaker to move some air in work shop?
Found a close up of the Em-Ken from the last diyFEST.

Click the image to open in full size.

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Old 19th April 2019, 02:18 AM   #12
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I have another picture of the EmKen just taken a few days ago. Still going strong with these and quite happy with them although I did make some minor alterations to the cabinet stuffing and added some acoustic resistance at the vents.
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Old 22nd April 2019, 10:12 PM   #13
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So I am building these right now with the Eminence 12LTA that I found neglected in a closet (Dave modded).
I am looking at the Fostex FT17H for a tweeter. I'll set in on top of the enclosure with a stand of some sort.
What do I need in terms of a crossover?
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Old 22nd April 2019, 10:14 PM   #14
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Essentially you'll have to perform measurements to see where you want to cross it over, how steep, and with what alignment. I think I set mine around 1kHz Linkwitz-Riley second order but it's been a while now. There are so many objectives to satisfy with a crossover design that there's no "one-size-fits-all" answer.
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Old 22nd April 2019, 10:18 PM   #15
jamc is offline jamc  United States
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I never did get phase plugs with these- just a hollow cylinder, unfinished on the inside, that pops in and is held by a magnet- can post pic tomorrow.
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Old 22nd April 2019, 10:27 PM   #16
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Speaker to move some air in work shop?
Only 2 pair of the wood plugs were ever made. The plumbing pipe (ie Deckard-style) prototype phase plugs fit (i got help from chris with the wooden base). These are essentially part of the plumbing pipe fixture i mocked up to mount an FT17 coaxially (bolted in place thru the pole-piece vent).

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Old 23rd April 2019, 03:27 PM   #17
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Daniel, tell us a story about the collection of amps in the foreground.
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Old 23rd April 2019, 06:34 PM   #18
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Speaker to move some air in work shop?
Yes, The ARC stuff is of particular interest… one of my 1st projects was a PCB for the SP3A (which in the end was a mirror image of intended — but Jesse made it work (ugly as hell thou).

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Old 3rd May 2019, 06:36 PM   #19
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They are assembled with the Fostex FT17H's.
The low end is lacking and mids a bit but I am in a big 2400sf open building and I haven't pushed the volume yet.
Where do I start in terms of acoustic damping? Acousta-stuff or sheet material and where?
I did build with removable back and the front/back internal brace as well as both side braces.
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Old 3rd May 2019, 06:42 PM   #20
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Speaker to move some air in work shop?
Damping of the Em-Ken consists of nominal 12mm cotton or wool felt (or the subs that should be in the notes) on all the walls. Low density damping (like polyfill biting) can be placed on the centre side of any holey braces.

How long did you make the vent shelves?

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