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[Wolf]

I think there was some misunderstanding going on. This past SDC weekend told me that.
if the tweeter has a waveguide and is as small as required, only then are waveguides permissible. You cannot add your own.
Cutting down of faces to fit the rules is also prohibited.

Wolf

[jhollander]

I may have started that discussion, where any pro-style compression driver where you have to add a waveguide would be not allowed. Carving out a wave guide in the baffle for a tweeter would not be allowed. I assume rear mounting a tweeter would also Not be allowed

[Billet]

To clarify, can we use a horn driver that is intended to be used with a horn as long as the horn is 4 1/8" or smaller?

[deschu]

Thank you for the clarification!

[Wolf]

Since compression drivers need horns, and some come with, as long as it is under dimension, this is fine. A 4" square CD/horn is okay. This will likely limit to 1" exit drivers and loading will likely not be better than 2k.
Wolf

[Wolf]

Nope, no homemade horns.

[DrewsBrews]

Limit to the size of the CD magnet? Or just purely the horn/faceplate. Ive got some CDs that I think are 4.5"dia. Otherwise ill probably have to buy something else.

[Wolf]

Fine, let's say <5" diameter magnet for CDs.

[jhollander]

This rear mounted tweeter is out but what about a reflector on the tweeter?

[Wolf]

Not sure what that would gain you. Not this time.
Wolf

[DrewsBrews]

I'm still a newb. Though from what I've learned I'm pretty sure the bare domes with big rear chambers will steal the show... But the calling to go against the grain has always been strong for me. Whatever it is I'm Interested to hang.

[illnastyimpreza]

Ben, Can I use a PS180 as my tweeter??(and crossed over accordingly)
it has a wizzer cone less than 4'' I believe

[DrewsBrews]

See post #6

[PWR RYD]

Is the 1.5 cubic foot limit internal gross?

[Wolf]

Yep, gross internal volume.

Wolf

[Billet]

What about a low freq driver with a whizzer cone? It seems to me that the whizzer is kind of a midrange, but I thought I'd ask.

[Wolf]

I don't care if the woofer has one, or is a widebander. I do not want either in the tweeter.
Wolf

[deschu]

Perhaps obvious questions:

1. Sealed, ported, passive radiators, etc., all ok?
2. Woofer size is 8 to 12, or must be marketed at 8, 10, or 12 inches? Eg is the Satori WO24P in or out? (Marketed as 9 1/2”)

thanks!

[Wolf]

Since there is no price limit, all forms of box are allowed without price additions, but normally/other years PRs would involve price inclusion. 9.5 is between 8 and 12, so that is fine.
Wolf

[analogkid455]

If I am using a huge slot port, does that count in the 1.5 ft3? I am guessing that the internal volume has to be 1.5 ft3 no matter what. Just want to clarify, because if that is the case, I am going PR.

[a4eaudio]

If I am using a huge slot port, does that count in the 1.5 ft3?

Yes, per post 38 - GROSS internal is what you start with, which hast to be 1.5 ft3 or less. Ports, driver displacement, bracing, etc. will reduce that to NET internal, which is what your woofer and box modelling cares about.

I am guessing that the internal volume has to be 1.5 ft3 no matter what. Just want to clarify, because if that is the case, I am going PR.

Well, you can be anywhere LESS than 1.5 ft3 gross if you want. The larger drivers will push a lot of designs up to this limit, but a 1.5 ft3 stand mount speaker is pretty darn bit. I'm trying to figure out how to go smaller but I'm giving up valuable low-end extension if I do. ugh...stupid trade-offs.

Edit: It does NOT have to be a stand mount, but that is what I'm trying to do so it makes it more difficult. A 1.5 ft3 tower is pretty easy.

[analogkid455]

Thanks for the reply. I will probably do PRs but just trying to think of everything. I can get extension, my problem is sensitivity. The trade-offs are real!

[DaveFred]

MTM's and 2.5's Okay?

[analogkid455]

From what I understand, MTM are allowed but 2.5s are NOT!

[a4eaudio]

That is also what I would gather from Minor Rule #1:
- 2-way passive designs only