Anarchy/Dayton TM build - AVS Forum
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post #1 of 356 Old 09-23-2011, 05:53 AM - Thread Starter
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This small ported 2-way is a Rick Craig design (of Selah Audio).
It calls for a 0.75 Cubic Foot cabinet and uses an Exodus Anarchy 6.5" for the low end and a Dayton Audio RS28F-4 1-1/8" Silk Dome Tweeter.

You will need to contact Rick Craig if you want the plans for this build. You can contact him here: rick@selahaudio.com

Many thanks to BigJim75 for allowing me the opportunity to showcase the curvomatic to form the cabinet's curved sides--found here: www.curvomatic.com. Very easy to remember.

Jim is currently offering a 20% discount to forum members.
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post #2 of 356 Old 02-16-2012, 07:41 AM
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any idea when we can expect your build?
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post #3 of 356 Old 02-16-2012, 08:36 AM
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Sent him a PM. Thank you for linking this. I look forward to your build.

Side note, I have an acct over there but can't reply to the post. grr.
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post #4 of 356 Old 02-16-2012, 12:10 PM - Thread Starter
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Quote:
Originally Posted by Square88 View Post

any idea when we can expect your build?

Soon. It's next up and it will be the one in which I showcase the Curve-O-Matic, to form the curved cabinet sides.


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Originally Posted by filtor1 View Post

Sent him a PM. Thank you for linking this. I look forward to your build.

Side note, I have an acct over there but can't reply to the post. grr.

Try this: rick@selahaudio.com

Here is Rick's Selah Audio website.
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post #5 of 356 Old 02-16-2012, 12:42 PM
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Thanks for the update. I really enjoy your builds.
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post #6 of 356 Old 02-16-2012, 01:14 PM - Thread Starter
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Quote:
Originally Posted by Square88 View Post

Thanks for the update. I really enjoy your builds.

Your welcome and thank-you very much.

I'm not quite ready to begin just yet, but here's a shot of the drivers.

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post #7 of 356 Old 02-16-2012, 03:12 PM
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I got him via PM PI. TY!

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Originally Posted by PassingInterest View Post

Soon. It's next up and it will be the one in which I showcase the Curve-O-Matic, to form the curved cabinet sides.




Try this: rick@selahaudio.com

Here is Rick's Selah Audio website.

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post #8 of 356 Old 02-17-2012, 01:18 AM
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Now I've seen those drivers I can't wait to see what you have planned for the cabs.
Your Curvomatic kit is going in the post today. www.curvomatic.com
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post #9 of 356 Old 02-17-2012, 04:14 AM - Thread Starter
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Quote:
Originally Posted by Bigjim75 View Post

Now I've seen those drivers I can't wait to see what you have planned for the cabs.
Your Curvomatic kit is going in the post today. www.curvomatic.com

Many thanks Big Jim, for allowing me to showcase your Curvomatic in my project. I've updated the thread title and the first post in this thread to reflect this new development.

Well, I thought I had edited the thread title, but I guess I don't have the power to do that after all.
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post #10 of 356 Old 02-17-2012, 05:50 AM
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Popcorn is in the microwave, just need to hit 'Start'.

Will Rick put up a page on his website for these? Sounds like a GREAT TM, with some good power handling. Great for a smaller HT.

JSS
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post #11 of 356 Old 02-17-2012, 05:58 AM - Thread Starter
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Quote:
Originally Posted by maxmercy View Post

Popcorn is in the microwave, just need to hit 'Start'.

Will Rick put up a page on his website for these? Sounds like a GREAT TM, with some good power handling. Great for a smaller HT.

JSS

That's a good idea about Rick putting up a page on his site for these. I'll suggest it to him.
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post #12 of 356 Old 02-17-2012, 06:30 AM
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I wonder if Exodus would do some sort of discount for us as well? That would be sweet. I missed the initial Gb they did. I like the possibility of an MTM version as well.
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post #13 of 356 Old 02-17-2012, 06:54 AM - Thread Starter
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Kevin has them on sale right now already. I don't know if he would discount them even further. I guess we can hope.
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post #14 of 356 Old 02-17-2012, 07:38 AM
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Awesome concept, can't wait to see what you do with this. I'm guessing the RS28F is going to have to be padded down about 10 dB but the power handling should be quite decent. Depending on the alignment the Anarchy can take well over 100W (not sure what the thermal limits are).

You might want to double-up or tripple-up the resistors in the L-pad for power handling purposes, and then hook these up to 200+ W amp to see what they can do.
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post #15 of 356 Old 02-17-2012, 01:45 PM - Thread Starter
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djkest--Good tip on doubling or tripling up on the resistors to make sure they can handle the wattage. I'm sure you're right about padding the tweeter. I can't swear to it exactly, but 10 dB is probably about right.
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post #16 of 356 Old 02-17-2012, 01:55 PM
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"Good tip on doubling or tripling up on the resistors to make sure they can handle the wattage."

for some, this will be very confusing. the idea is to use more and/or higher power resistors that provide the same net resistance as the stock model.

if one just doubles or triples the same resistors, the whole crossover will change.

Listen. It's All Good.
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post #17 of 356 Old 02-17-2012, 03:41 PM - Thread Starter
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Thanks for clarifying, LTD02.
Yeah, the idea is to increase surface area to insure good dissipation of heat, but still keep the net resistance the same, like you said.

I've already got the resistors originally called for, so I may run with them temporarily, as long as I make provisions for more on the crossover board so I can change them out later.
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post #18 of 356 Old 02-20-2012, 11:01 AM - Thread Starter
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I am learning how to use Eagle software to create a PCB layout, so I can make the crossovers for these speakers while I await the arrival of the Curvomatic. I'll go into the board layout stuff some more later.

Yesterday, I took a few minutes and made some clamping cauls, which I documented at the Shack. Here is a link, in case any of you fine folks here are interested.
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post #19 of 356 Old 02-20-2012, 12:11 PM
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Yeah sorry. So if you had say a 10 ohm resistor that is rated for 10 watts, you could instead substitute 3 30 ohm resistors in parallel to equal a net resistance of 10 ohms, but giving you 3x the power handling.

It's basic circuit stuff, and most people know about that, but some don't.

I'm not sure if you ever need to do this with anything other than Resistors though.

As far as construction details go, what material will you be making the sides out of? I'm guessing the overall dimensions of this speaker are going to be ~9 x 12 x 16", am I close? Anxious to see how you do this, as I am in the planning phase of my own curved speaker build.
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post #20 of 356 Old 02-20-2012, 02:51 PM - Thread Starter
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Quote:
Originally Posted by djkest View Post

As far as construction details go, what material will you be making the sides out of? I'm guessing the overall dimensions of this speaker are going to be ~9 x 12 x 16", am I close? Anxious to see how you do this, as I am in the planning phase of my own curved speaker build.

You are close on the dimensions. I haven't firmed things up yet concerning style, material or exact dimensions, but I intend to stay pretty close to the original 0.75 cubic foot enclosure size that Rick used.
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post #21 of 356 Old 02-23-2012, 04:39 PM
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I don't know if anyone is interested but I just measured one of my Anarchy woofers and here are the T/S params:

Fs = 46.43
Qes = 0.46
Qms = 7.627
Qts = 0.424
Vas = 19.7 L (which is wildly different that the published 9.61 which leads me to believe that it is a typo on the web site since all the other values are close)
Re = 6.321
Le = 1.438
SPL = 88.21

This is on a brand new, not broken in driver. YMMV
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post #22 of 356 Old 02-23-2012, 05:01 PM - Thread Starter
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Thank you very much, John.
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post #23 of 356 Old 02-24-2012, 04:47 AM
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I had asked Kevin about that VAS measurement and he said to go with his value, not the one I calculated. I'll ask Rick what his measurement was.

Rick didn't measure the VAS.
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post #24 of 356 Old 02-24-2012, 06:29 AM
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Quote:
Originally Posted by johngalt47 View Post

I had asked Kevin about that VAS measurement and he said to go with his value, not the one I calculated. I'll ask Rick what his measurement was.

Rick didn't measure the VAS.

Let me clarify. Before I tested the woofer I looked at the Voice Coil magazine measurements. I used their parameters as a starting point and chose a test box based on my experience with woofers of similar size. I then did nearfield testing and summed the output of the woofer and port.

With a nearfield measurement being large signal it's more accurate than a simple T/S set of parameters. In this case I think it's even more important because the Xbl motor's inductance changes quite a bit over excursion. Looking at your parameters I would say that my box volume and tuning matches them very well.

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post #25 of 356 Old 02-24-2012, 06:32 AM
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Sorry for my late reply. I didn't put up a page on my site because it was my understanding that the woofer was no longer in production. I have been told there might be a 4-ohm version available; however, that would dictate a new crossover design.


Quote:
Originally Posted by maxmercy View Post

Popcorn is in the microwave, just need to hit 'Start'.

Will Rick put up a page on his website for these? Sounds like a GREAT TM, with some good power handling. Great for a smaller HT.

JSS


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post #26 of 356 Old 02-24-2012, 07:52 AM - Thread Starter
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Thanks for the clarification, Rick
Kevin is still selling the 8 ohm version.
I mentioned the new 4 ohm Anarchy in the works to indicate that he is still keeping the business going, just scaled down.
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post #27 of 356 Old 02-25-2012, 06:33 AM - Thread Starter
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The Curvomatic has arrived, so I should start making some progress soon.
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post #28 of 356 Old 02-26-2012, 05:10 AM
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He is still selling the 8 ohm version because I just bought 2 of them.
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post #29 of 356 Old 02-26-2012, 05:11 AM
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Since I don't get Voice Coil magazine, was it Vance who worked with this driver?
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post #30 of 356 Old 02-26-2012, 01:23 PM
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Quote:
Originally Posted by johngalt47 View Post

Since I don't get Voice Coil magazine, was it Vance who worked with this driver?

Yes

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