Box for Tang Band W6-1139SIF

[bdiermeier]

Hey everyone,

I have had a Tang Band W6-1139SIF laying around for a while that I finally want to put to good use. I hope to pair it with a couple of JBL bookshelf speakers I use at my desk, so it will be used near field 75% of the time (occasional use to fill the room). I know the basics to model a box, but everything I've read about this woofer sounds like chuffing becomes a big issue, so I was hoping someone had a proven design they could share.

I plan to place it under my desk, so I'm trying to keep it 12x12 or smaller external dimensions (including SA70 plate amp), but can go larger if it needs it.

Thanks in advance!

[kenrhodes]

Re: Box for Tang Band W6-1139SIF

Do a search and you will find MANY proven designs and builds with that exact combo. If you want to give the flame proof suit a break use the search engine.

[bdiermeier]

Re: Box for Tang Band W6-1139SIF

Maybe I'm just searching wrong, I'm struggling to find much in the way of proven designs. I've found quite a few threads where a couple ideas are thrown out, but not much in the way of completed builds.

One that did look interesting right now is the "French Bulldog". Forgetting the designer and I'm not on my phone, so I'll have to look it up again later. I was just seeing if anyone had any other ideas.

I'm in college and plan to build this Thanksgiving weekend, so I'm trying to stick to basic box designs, and avoid slot ports and such.

[careyink]

Re: Box for Tang Band W6-1139SIF

Maybe I'm just searching wrong, I'm struggling to find much in the way of proven designs. I've found quite a few threads where a couple ideas are thrown out, but not much in the way of completed builds.

One that did look interesting right now is the "French Bulldog". Forgetting the designer and I'm not on my phone, so I'll have to look it up again later. I was just seeing if anyone had any other ideas.

I'm in college and plan to build this Thanksgiving weekend, so I'm trying to stick to basic box designs, and avoid slot ports and such.

I normally use Google to search http://www.google.com/search?sclient...64.m3v2Z2W1PO4

[DanP]

Re: Box for Tang Band W6-1139SIF

Even the proven designs will most likely chuff unless a passive radiator is used. The required vent diameter to mitigate this would result in a duct so long that it wouldn't fit in the small enclosure. So now you're either looking at a 10" passive radiator or a 1 cu ft enclosure, which brings me to a pet peeve of mine when it comes to subs. If I can fit a 10" passive radiator in my box, I'd rather use a 10" active driver. If I'm going to make a 1 cu ft box just to accommodate a giant vent, I'd rather use a 10" sub in a sealed 1 cu ft enclosure.

So where does that leave you with your 6.5" sub? Build a sealed box for it that fits the sub and the amp. The bigger you make it, the less bump you'll get around 100Hz, so make it as big as you are willing and call it good. Placed on the floor (probably against a wall) and listening nearfield, you'll be very surprised at how good this will sound. Tiny box, no chuffing, crazy bass.

I did a similar thing with this woofer's little brother (W5-1138) in a 2.5L sealed enclosure. It sounds amazing and the W6 is a pretty big step up from the W5.

Dan

[kenrhodes]

Re: Box for Tang Band W6-1139SIF

http://techtalk.parts-express.com/showthread.php?224356-Cerberus-Subwoofer-Build

http://techtalk.parts-express.com/showthread.php?238765-Voxel-a-mini-sub&highlight=W6-1139SIF

http://techtalk.parts-express.com/showthread.php?241399-The-PEDS-a-2-1-speaker-system-for-your-desk-den-bedroom-or-office&highlight=W6-1139SIF

[scottsehlin]

Re: Box for Tang Band W6-1139SIF

In the modeling I've done, it looks like you could put the 1139 in 0.5 cu. ft. tuned with two of the 1.5" x 4" flared ports connected at the straight ends making a 1 1/2" by 8" port flared at both ends. That should do a decent (though maybe not perfect) job mitigating the chuffing and be reasonable dimensionally. That would give an f3 around 30 Hz.

Like Dan, I have tried the smaller W5 in a small sealed box and was pleasantly surprised.

[killa]

Re: Box for Tang Band W6-1139SIF

I don't know if the neo version and ferrite are close spec wise but here is a old project using the neo http://www.rjbaudio.com/Cerberus/cerberus.html

[BOBinGA]

Re: Box for Tang Band W6-1139SIF

See the PEDS in my signature for that woofer in a quarter foot seald. The trick is that you need bass boost. I used the little PE 2.1 amp which has it built in.

[weinstro]

Re: Box for Tang Band W6-1139SIF

I have W6-1139SIF, W8-740P, and W8-1363SBF on hand. All fine (sub) woofers, but all the box modeling programs show that these drivers love a small box and a really long vent. To avoid chuffing, the vent diameter starts to get large, and then you run into port resonance. To wit, the design I have for the W8-1363SBF is a 2 ft^3 box where half the box is allocated to snaking a 3" in. vent round and round. (About a yard in length). If I route the vent externally, the result will look like an amateur abstract art project, and yet we all want our projects to stand on their own aesthetically.

I tried the passive radiator approach but discovered that there are not many suitable PR's. I found one that priced in at $60 but decided that a larger box and a couple of evenings in front of a bandsaw were acceptable tradeoffs.

One possible way out, at least for the W6-1139SIF and the W8-740P, might be a tapped horn (really a tapped tapered transmission line). HornResp can accurately predict the results, but cannot generate the design parameters (lengths and areas) for you. I was able to get sort of ho-hum close for these drivers, but absolutely nothing productive came about with the W8-1363SBF in a tapped horn application. I haven't completely abandoned the notion, but none have made it to the table saw yet.

[fastbike1]

Re: Box for Tang Band W6-1139SIF

The W6-1139 will work in Lil Mike's Insubnia design

[Beau]

Re: Box for Tang Band W6-1139SIF

The W6-1139 will work in Lil Mike's Insubnia design

Will it? Hmmmmm

[johnnail]

Re: Box for Tang Band W6-1139SIF

I recently did a simulation using this subwoofer.....something for just such a purpose as you are going to use. I came up with a .32 cu.ft. passive radiator box....and used 2 of those 6.5" passive radiators that PE has on sale. Using dual passives, and adding 25 grams to each radiator will give an F3 of approximately 40hz....figuring in minimal room gain, extension to about 32hz. I am planning on using the SA70 amp, but the SA100 would also be a good candidate. I used the displacement volume of the SA70 amp to calculate the needed box size. I came up with a 10.5" cube (external dimensions) using .75" thick mdf. Average damping materials on top and bottom panels of box, along with some in the vertical corners. YMMV.

John

[thekorvers]

Re: Box for Tang Band W6-1139SIF

http://techtalk.parts-express.com/showthread.php?247668-W6-sub

[thekorvers]

Re: Box for Tang Band W6-1139SIF

http://techtalk.parts-express.com/showthread.php?244021-Cerberus-Subwoofer-Modifications