GRS Poly "surface mount" 4" 4 ohm and ND28F in waveguide

Ken is printing waveguides for the tweeters, and I just bought 0.34 cubic foot flatpacks from Cinergy since it is too cold to spend too much time out in the garage. I can glue them up indoors, and then maybe cut one driver hole at a time as weather permits.

I will flush mount the tweeter, but surface mount the woofer.

In this enclosure, it will extend to 43 Hz!

Granted, it won’t play super loud at that low of a frequency but it should do fine for nearfield usage.

So anyways, should be a super fun budget banger that should rock as nearfield PC speakers (as long as I do not fuck up the XO).

Measured parameters:

These are nearly perfect parameters for a small driver, check out excursion control below tuning:

I have noticed on many smaller drivers provided Q is > 0.5 and they are relatively low compliance you can expect excellent cone control below tuning - at the cost of a somewhat large (relatively speaking) enclosure.

Anyways, will be my last budget banger for awhile, need to focus on some of the nicer designs I have in the queue.

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Yeah been waitin on that all cone 3-way :wink:

That is still very much on the docket, likely one I’ll build cabinets for this summer and complete next winter.

Ken sent me the waveguides, and other than the screws being too short they are dimensionally nuts-on. Hot glue to the rescue.

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I might machine the baffles for these this coming Monday. I am using a flat pack from Cinergy.

Speaking of, PE could learn how to pack flatpacks from Erich. He actually uses expanding foam in the corners to keep the flatpack stack from sliding around. At first it pissed me off trying to get the product out of the box, but when I finally saw why I was genuinely impressed.

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I have my SLA printer set up and running if you want some REALY nice looking prints let me know I can bring them to InDIYana. I would like to get the screw height corrected if possible.

I lost the little screws :frowning: