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Old 17th February 2013, 05:34 PM   #1
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Default Designing Tang Band 881si Enclosures

I'm very new to the idea of building speakers, but I'm buying MDF and Baltic Birch ply for a 16" band saw I'm building and I'll have left over stuff. I thought I'd take a crack at speakers.

I'm ordering some Tang Band W3-881si speakers. I want to design something like the Gotham & Son Mercer speakers for my TV or uFonken type for my desktop computer. I have the FF85K uFonken ov9 plans in front of me and they are as detailed as I've seen about what is inside a speaker. I have no idea what's inside a Mercer speaker, but they look like the same Tang Band speakers.

I thought I might try mounting them in some wooden ammo boxes just to see what would happen.

I have no idea on what design to match with these full range drivers. I found these calculators which seem like they would be helpful if I knew anything about the terms used:

Enclosure Calculators | DB DYNAMIX AUDIO

What does this noob need to know? Cheers, Seth
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Old 17th February 2013, 06:46 PM   #2
guangui is offline guangui  Puerto Rico
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I just built a pair of uFonken with foam core and ordered a pair of W3-881SI to see how they sound. I'm sure there are other threads here that discuss the use of the W3-881SI in the uFonken, and in other enclosures.
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Old 17th February 2013, 11:05 PM   #3
xrk971 is offline xrk971  United States
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Quote:
Originally Posted by guangui View Post
I just built a pair of uFonken with foam core and ordered a pair of W3-881SI to see how they sound. I'm sure there are other threads here that discuss the use of the W3-881SI in the uFonken, and in other enclosures.
Pictures please
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Old 17th February 2013, 11:19 PM   #4
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I wonder what they would sound like in a couple of wooden ammo boxes. I could use shells for feet. Not really into shooting here, but we have a couple of ammo boxes that we use for magazines and mail.
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Old 17th February 2013, 11:33 PM   #5
xrk971 is offline xrk971  United States
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Try it - fill with pillow stuffing. They should sound fine. Lots of boomboxes using this idea. If you want bass reflex use winisd and calculate vent for deeper bass.
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Old 17th February 2013, 11:45 PM   #6
guangui is offline guangui  Puerto Rico
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Originally Posted by xrk971 View Post
Pictures please
Not the prettiest, as it is my first foam core build. It is 3/16" thk. foam core. I have some old X-Acto "imitation" knives, so the cuts were not the best. Later I found out that 3/16" foam core easily cuts with scissors, so next one I might use a good pair of really sharp scissors I have. I also had a cheap-o compass to mark the circle for the holes, my good one is nowhere to be found. So, the hole for the driver is not the roundest, but within specs. I learned a lot, hadn't use foam core since my college days, there are some small gaps which I will correct with some kind of filler (wood, spackle, caulk, or silicone). They will be primed and painted, so they don't look so bad. The table is actually the 12 mm x 2' x 4' baboon plywood panel from which the final enclosures will be built. You can also see the felt used to line the inside of the enclosure. There is no picture of the other one, as I'm in the middle of cutting and gluing it.
Attached Images
File Type: jpg uFonken Foam Core.JPG (20.3 KB, 528 views)
File Type: jpg uFonken Foam Core Comp.JPG (254.1 KB, 523 views)
File Type: jpg uFonken FC Enclosure.JPG (20.3 KB, 510 views)

Last edited by guangui; 17th February 2013 at 11:47 PM.
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Old 18th February 2013, 01:13 AM   #7
xrk971 is offline xrk971  United States
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Guangui,
Thanks. A sharp razor is the best for clean cuts. Scissors crush the edge. Cut in several strokes with the first defining path and go deeper each time. Very clean that way. How does it sound?
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Old 18th February 2013, 01:42 AM   #8
guangui is offline guangui  Puerto Rico
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Quote:
Originally Posted by xrk971 View Post
Guangui,
Thanks. A sharp razor is the best for clean cuts. Scissors crush the edge. Cut in several strokes with the first defining path and go deeper each time. Very clean that way. How does it sound?
Tried the scissors, and yes they crush the edges. The X-Acto knives I have cut well, but in some areas they kind of rip the foam. I have plenty of razors, should have thought about the obvious before.
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Old 18th February 2013, 11:03 PM   #9
gychang is offline gychang  United States
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Originally Posted by wallygoots View Post
I wonder what they would sound like in a couple of wooden ammo boxes.
look here: Bookshelf build with TB W3-881SI, nice

excellent sound I listen to it almost daily.

gychang
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Old 21st February 2013, 01:47 AM   #10
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I have built two different speakers with the TANG Band 3" full range drivers

My favorite is the Del Sol at the following URL

DelSol - Aura NS3-194-8E - Inexpensive DIY Fullrange Bookshelf Speaker

The site has the complete plans and my version the sounds great to my ears with a surprising level of bass and great midrange. There is a lot of build experience with this speaker design on the internet. My cabinet did not have any damping material on the back.

I also built a folded horn version. Which was a challenge for my limited wood working skill. I would get some advice on stuffing the cabinet. I only stuffed the main speaker chamber, but I did not really know what I am doing and did not test the speaker before final assembly

Torvi-R08 ݌v}

This site is in Japanese, but my web browser did an pretty good translation. There detailed drawings in mm (unfortunately). Some dimension adjustment is needed since the plans are for 9mm plywood.

Sorry no measurements on either finished speaker.

Good Luck!
Attached Images
File Type: jpg Blue Drop - Final.jpg (142.4 KB, 434 views)
File Type: jpg Blue Drop - Back.JPG (241.5 KB, 423 views)
File Type: jpg Blue Drop - Front.JPG (206.6 KB, 82 views)
File Type: jpg Blue Drop - 4.JPG (218.5 KB, 135 views)
File Type: jpg Blue Drop - 5.JPG (181.3 KB, 133 views)
File Type: jpg DEL SOL 1.JPG (162.8 KB, 116 views)
File Type: jpg DEL SOL 2.JPG (146.5 KB, 81 views)
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