First DIY -2 Ported 3.6cuft 12" Subs - AVS Forum
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post #1 of 31 Old 05-08-2012, 09:21 AM - Thread Starter
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After month's of reading threads on the Subwoofer & DIY forums i finally decided to build my own.

These subs will be replacing my (kef cube 2) subwoofer, which did a decent job I found,.. but I never had enything alse to compare to.


I wanted to thank all the forum members who answered countless questions and especially "Mayhem13" , who has basically designed the Subs & guided me from the beginning!!


Each Sub will have 3.6 cuft net and will have a Dayton RSS315 HO-44 Driver ,tuning will be 18hz and both will be powered by a Dayton SA1000.

I built a table "Sled" ,to be able to cut precisely lengths of MDF that extend further than my table fence .

Another tool that i bought is the Digital angle meter , great little tool that makes setting your saw angle, simple and very precise ( 1/10 of a degree)

Front baffle of the subs will be on a angle of 81.5 degree's and the Subs will be used as stands for the bookshelf's that will be built latter !!

I Finally got started mayhem !!
LL
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LL
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post #2 of 31 Old 05-08-2012, 09:29 AM
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I'm looking forward to seeing how these turn out. I've been reading quite a bit on this forum as I mentally plan out my first sub build. There are some incredible builds here, but I want my first build to be a simple design that will come in at a reasonable cost (but still perform well enough). This project looks right up my alley.

Do you have plans you can post?
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post #3 of 31 Old 05-08-2012, 08:26 PM
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Sloped baffle.........very cool! For some reason I can't see your pix on my iPad with the special AVS app??????
Anyways..... A sled is an excellent tool for the saw.

I'll sit back and enjoy DiY through you for a while. I'm a little DIYed out after completely gutting and Reno of our 4 piece bath. Gotta find a way to get charged up to do 120ft of custom cedar privacy fencing......I promised to have it done by memorial day!
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post #4 of 31 Old 05-08-2012, 08:52 PM - Thread Starter
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Quote:
Originally Posted by mayhem13 View Post

Sloped baffle.........very cool! For some reason I can't see your pix on my iPad with the special AVS app??????
Anyways..... A sled is an excellent tool for the saw.

I'll sit back and enjoy DiY through you for a while. I'm a little DIYed out after completely gutting and Reno of our 4 piece bath. Gotta find a way to get charged up to do 120ft of custom cedar privacy fencing......I promised to have it done by memorial day!

Hope you get to see pics, ...weird because i can see them on i phone ?

Gonna start the braces soon. I'll keep u posted !

Have fun with your fence
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post #5 of 31 Old 05-21-2012, 07:23 PM - Thread Starter
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Braces are done in birch ply for superior strength. I used this triangular pattern for strength and since i needed a opening up the middle for the port.

The port opening coming out of a angled baffle was a little challenge.I hope the pics help my explaination ?

Had to glue part of the port to the first sheet of angled baffle. glued a coupling on port before cutting it at the right angle to give me more glueing surface. when dried made opening in center to insert router with angled shims attached, this way router is parrallel to port again and used pvc walls to guide the trim bit.... (I could'nt do port hole of both layers of baffle at once,2" trim bit was not long enoughto extend through double baffle+shims )

Now im glueing the second sheet of the baffle together and will repeat same method for port holes.
LL
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post #6 of 31 Old 05-21-2012, 07:32 PM
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Cool looking project!
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post #7 of 31 Old 05-31-2012, 10:35 AM
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Do you have the box dimensions and port lenght for this design. I also have a HO-44 that I have been deciding on a project to use it in. But I only have a Bash 500 amp to run it.
Would this design work out for me as well ?
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post #8 of 31 Old 05-31-2012, 04:14 PM
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yes lopo. it will work the same. you will just get a little less spl.

Listen. It's All Good.
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post #9 of 31 Old 06-01-2012, 02:45 PM - Thread Starter
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Quote:
Originally Posted by lopo View Post

Do you have the box dimensions and port lenght for this design. I also have a HO-44 that I have been deciding on a project to use it in. But I only have a Bash 500 amp to run it.
Would this design work out for me as well ?

The box dimensions are H28 x 16W x 23D (top 19D)
I will be running (both) with one SA 1000 amp .



Made a jig to flare inner ports,i used Bondo and some MDF discs i made ,...went very well.

Heated the PVC with a propane torch, lubricated jig with some dish soap then pushed till reached flat base , let cool with wet rag then.....voila!!
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post #10 of 31 Old 06-01-2012, 04:11 PM
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whats the port lenght ? Your should look pretty cool with the angled baffle.

Thanks
Al
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post #11 of 31 Old 06-01-2012, 07:56 PM - Thread Starter
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Quote:
Originally Posted by lopo View Post

whats the port lenght ? Your should look pretty cool with the angled baffle.

Thanks
Al

Port is 26.15" long
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post #12 of 31 Old 06-08-2012, 08:04 AM - Thread Starter
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UPDATE: Okay i've got most of the "Guts" of the sub completed. Need to add some Roxul insulation on just the backwall,... binding posts and the woofer wiring, before gluing the sidewall into place.

Since i could'nt add vertical bracing from top to bottom because of the port, I added some 45deg angles to help brace top and bottom panels.

Ports are going through braces at 1/4" gap, and are secured to to braces with silicone to try and minimize vibrations. IMG_1083.JPG 2169k .JPG file IMG_1084.JPG 1565k .JPG file
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File Type: jpg IMG_1084.JPG (1.53 MB, 22 views)
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post #13 of 31 Old 06-08-2012, 08:23 AM - Thread Starter
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Why are'nt my pictures posted right away like they were before in previous posts ??
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post #14 of 31 Old 06-08-2012, 08:40 AM
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A lot of creativity in this build. Nice work so far.
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post #15 of 31 Old 06-16-2012, 06:18 PM - Thread Starter
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A lot of creativity in this build. Nice work so far.




Thanks Baniels !
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post #16 of 31 Old 06-18-2012, 08:50 AM
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Quote:
Originally Posted by randyc1 View Post

Why are'nt my pictures posted right away like they were before in previous posts ??

I could be that they are too big, try resizing them smaller.

Chris

"It hurts to admit when you make mistakes - but when they are big enough, the pain only lasts a second."
--Despair, Inc. "Regret"

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post #17 of 31 Old 06-19-2012, 10:29 AM - Thread Starter
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i used my iphone camera just like the rest of pics?
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post #18 of 31 Old 06-19-2012, 12:24 PM
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Just a fyi for shaping the pvc, you might find it easier in the future to boil some vegtable oil and put the end that needs shaping into it. This is a easier way to move the material without burning it, and possibly inhaling the fumes. I used this method to make pvc darts for a air cannon lol.
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post #19 of 31 Old 06-19-2012, 02:16 PM
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Don't attach the photos (paperclip icon), use "insert image" which looks like a photo of a landscape.

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post #20 of 31 Old 06-19-2012, 06:57 PM
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Looking good Randy!

You went through quite an effort for port flares. Maybe next build, you can try inserting the raw PVC into the back of a double thick baffle only .75 in, and then rounding over the outer layer with a 3/4 roundover bit. Much faster, secure, and a clean front baffle.
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post #21 of 31 Old 06-19-2012, 07:05 PM - Thread Starter
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Quote:
Originally Posted by mayhem13 View Post

Looking good Randy!
You went through quite an effort for port flares. Maybe next build, you can try inserting the raw PVC into the back of a double thick baffle only .75 in, and then rounding over the outer layer with a 3/4 roundover bit. Much faster, secure, and a clean front baffle.


That's excactly what im doing for the exterior port , the picture u see is for interior port.
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post #22 of 31 Old 06-20-2012, 12:44 PM
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oh...sorry. I didn't realize you were flairing the inside. Whether it's right or wrong, i've never flaired the inside before.eek.gif
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post #23 of 31 Old 06-20-2012, 02:41 PM
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I've seen lots of people flare the inside of the port. Usually they will make a donut then flare with a round over like this

http://www.subwoofer-builder.com/ring.htm

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post #24 of 31 Old 06-20-2012, 03:23 PM - Thread Starter
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Quote:
Originally Posted by mayhem13 View Post

oh...sorry. I didn't realize you were flairing the inside. Whether it's right or wrong, i've never flaired the inside before.eek.gif

Hey Mayhem, if you dont think it's a good idea ,i could cut the flare off ,and bring the total length back to the original 26.11 (I had forgotten the double baffle , 1.5" of port length) ??

26.11 is the lenght for a 18hz tune, now im about at 17.5 hz.???

thanks Mayhem.
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post #25 of 31 Old 12-14-2012, 07:45 PM - Thread Starter
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IMG_1623.JPG 1508k .JPG file IMG_1621.JPG 1830k .JPG file Update on my Sub build,: I took a long break from the build ,but now they are almost completed,

I Dampened just the back wall with 2'' of Safe and Sound Roxul insulation, and was then ready to complete the enclosures ,


Continued with enclosure esthetics (roundovers) and sanded. Sealed with a oil based primer ( Zinnser Cover Stain) tinted grey,
which builds well ,seals the router edges very well and sands very well also!!
2 coats sanding in between and i was done.

Now im ready for the finished coats ?
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post #26 of 31 Old 01-03-2013, 05:30 PM - Thread Starter
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Just a few pics of my new Subs still on primer , they look pretty cool, and will look great with the bookshelves that i will eventually build to go on top ( Tarkus style).

They sound just as Awesome,!! creating a lot of deep bass and the impession of weight with movies. They are powered by a SA1000 .
I have not yet measured their FR with REW and am using no EQ yet.


Want to thank "Mayhem13" for all his help designing thes subs for me !!!!
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post #27 of 31 Old 01-03-2013, 05:37 PM
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Very cool. Nice job.

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post #28 of 31 Old 01-03-2013, 06:03 PM
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Those are some pretty fancy looking subs!
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post #29 of 31 Old 01-03-2013, 06:30 PM
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I really dig the slant. Nice touch.
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post #30 of 31 Old 01-03-2013, 06:34 PM
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Great job!
Congrats on a nice build!cool.gifsmile.gif

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