Next up in the shop: a LOUD, paper-cone 3 way

[Pete Schumacher]

Re: Next up in the shop: a LOUD, paper-cone 3 way

I like the idea of a "rear-firing woofer," because it allows the front of the cabinet to be narrower. Verity does this with their designs, and they look quite elegant, in my opinion.

[DoubleTap]

Re: Next up in the shop: a LOUD, paper-cone 3 way

2. Where's a good place to get raw veneer?

Sorry, didn't notice this question ... my 2 favorite sites

http://www.wood-veneers.com/
http://www.certainlywood.com/

[Pete Schumacher]

Re: Next up in the shop: a LOUD, paper-cone 3 way

Sorry, didn't notice this question ... my 2 favorite sites

http://www.wood-veneers.com/
http://www.certainlywood.com/

you could spend HOURS just looking at all the veneer in that first link.

:eek:

[mightym]

Re: Next up in the shop: a LOUD, paper-cone 3 way

Forgive my ignorance, I could find nothing on the Trapezoidal sectioned MTM Mr. Schumacher showed us in Post # 106.

Interesting looking speaker. I heard the small Von Schweikerts with the Fostex Mid's earlier this year, and was quite impressed. Are there any other sources besides Von Schweikerts web site with info on the above referenced speakers?

I'm looking forward to seeing a completed build here, sorry about the garage crack, I honestly thought that's what these were for, MY Bad....

Back to lurking now,
John

[Pete Schumacher]

Re: Next up in the shop: a LOUD, paper-cone 3 way

Forgive my ignorance, I could find nothing on the Trapezoidal sectioned MTM Mr. Schumacher showed us in Post # 106.

Interesting looking speaker. I heard the small Von Schweikerts with the Fostex Mid's earlier this year, and was quite impressed. Are there any other sources besides Von Schweikerts web site with info on the above referenced speakers?

I'm looking forward to seeing a completed build here, sorry about the garage crack, I honestly thought that's what these were for, MY Bad....

Back to lurking now,
John

That was a Von Schumacher design!!! ;) It just fit the description of narrow front with larger back for a woofer. That particular creation had an Adire Audio DPL12 on the bottom. Could have easily been mounted on back as well.

[Paul Carmody]

Re: Crossovers n' measurements

First off, I have a name for these monsters! I call them Tarkus. For those uninitiated in prog rock, it's the name of an epic song by Emerson, Lake, and Palmer (which sounds quite good on these :D). Tarkus is a half-armadillo, half-tank creature. Seemed appropriate on many levels.

Now, onto the crossover. Nothing too complicated. Mostly 2nd order electrical filters and L-pads all around. The mid has a notch filter (C4 + L3) at 4500 Hz, because the mid does have a bit of a breakup, and it's worth the few dollars in parts to get that hash out of the way when cranking these things to 11.







The parts count has some wiggle room in it. What's shown is what I'd consider middle-of-the-road; nothing fancy, but no cut corners, either. I paralleled an electrolytic + poly cap on the mid circuit for [potential] sonic benefits, however there's no reason one couldn't use a single 65 uF cap instead. Likewise, the L-pads use the Dayton 10-watt non-inductive resistors in pairs, which brings the power handling up to 20 watts each (which should be enough). Someone could just as well use single 20+ watt wirewound resistors for the L-pads and it'd be fine.
My total is $310; with the cheaper substitutions above, it was around $290. Of course, you can always shop around for components as well....

[Paul Carmody]

Re: about the shape...

In case anyone was wondering, the angled cabinets in this design are purely cosmetic. One could achieve the exact same-sounding speaker using rectangular enclosures, just as long as the interior volume of the cabinets is the same. (I have "square" drawings of them on my hard drive somewhere... )

[evilskillit]

Re: Next up in the shop: a LOUD, paper-cone 3 way

Ooooo, I like these. I have no reason to build a pair, but I really kind of what to. I guess I could put them in the living room. Or in the music room and move the music speakers to the living room, heh.

Actually I'll probably just push to get somebody I know to build a pair o have me help them build a pair so I can see and hear them. Either way, I like. Are these by chance what you're bringing to Iowa? *excited*

[fastbike1]

Re: about the shape...

No, no! We likes the angles. Just another set of stacked boxes otherwise.:p

In case anyone was wondering, the angled cabinets in this design are purely cosmetic. One could achieve the exact same-sounding speaker using rectangular enclosures, just as long as the interior volume of the cabinets is the same. (I have "square" drawings of them on my hard drive somewhere... )

[kirk78h]

Re: Next up in the shop: a LOUD, paper-cone 3 way

Does that make sense? Obviously it's a bit hard to put into words but I think anybody proficient enough to build cabinets in the first place can figure it out once they get going. The process takes more time than contact cement, but I don't think is any harder ... and cold press is a better bond than contact cement.

Please forgive the hijack / side note to the thread for a moment; but I have to ask -- how you deal with glue squeeze out with this method?

[jackhughman]

Re: Next up in the shop: a LOUD, paper-cone 3 way

Hi,
I hope you don't mind me chime-ing in here but I learned a lot.
I love the crossover integration and the mix of woofer / mid slopes. thanks heaps Paul. cheers, Jack

[fastbike1]

Re: Next up in the shop: a LOUD, paper-cone 3 way

Use a bit less glue, and use blue painter's tape around the edges that aren't being worked. You don't need a huge amount of glue, at least not with the Titebond Cold Press.

Please forgive the hijack / side note to the thread for a moment; but I have to ask -- how you deal with glue squeeze out with this method?

[ktaillon]

Re: Next up in the shop: a LOUD, paper-cone 3 way

I don't see a picture with the grill off. How do you know?

[DoubleTap]

Re: Next up in the shop: a LOUD, paper-cone 3 way

Please forgive the hijack / side note to the thread for a moment; but I have to ask -- how you deal with glue squeeze out with this method?

If you apply the glue with a roller you're not going to have any, or very little squeezed out. And even if some does it's nothing to worry about, just sand it off or shave it off with a razor blade.

[Dean1000]