Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Dual Tang Band 6.5" BR
Dual Tang Band 6.5" BR
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 3rd December 2017, 07:34 AM   #1
grahamgraham is offline grahamgraham  United Kingdom
diyAudio Member
 
grahamgraham's Avatar
 
Join Date: Oct 2016
Location: London
Default Dual Tang Band 6.5" BR

Hi all,

After much mucking about I have just ordered two Tang Band 6.5" W6-1139SIF. I plan on making a second one at a later date for a pair of dual subs. It/they will be used for music and HT with my Genelec 1029a monitors for SQ.

Tang Band W6-1139SIF 6-1/2" Paper Cone Subwoofer Speaker

I've run sims on WINISD and have come up with the following cabinet spec for an F3 of 33hz:

26 litres / 0.918 ft3 - net cabinet volume
32.4 litres gross cabinet volume (inc. driver/port displ.)
10cm / 3.9" width port
69cm / 27" port length

Port velocity is low at 12.5ms @ 31hz.

Would anyone mind giving their thoughts on this proposed design before I order wood, please?

A couple of graphs attached that I think are relevant.

Many thanks in advance!
Attached Images
File Type: png Screenshot (1).png (101.4 KB, 371 views)
File Type: png Screenshot (2).png (63.2 KB, 366 views)

Last edited by grahamgraham; 3rd December 2017 at 07:47 AM.
  Reply With Quote
Old 3rd December 2017, 07:56 AM   #2
TBTL is offline TBTL  Germany
diyAudio Member
 
Join Date: Oct 2013
Transfer function looks good. How are you going to fit a 69 cm port in a 26 L enclosure?

This might be of interest for you to reduce port chuffing: Porting at Subwoofer-Builder.com
  Reply With Quote
Old 3rd December 2017, 08:06 AM   #3
grahamgraham is offline grahamgraham  United Kingdom
diyAudio Member
 
grahamgraham's Avatar
 
Join Date: Oct 2016
Location: London
Quote:
Originally Posted by TBTL View Post
Transfer function looks good. How are you going to fit a 69 cm port in a 26 L enclosure?
Thanks,

I will be using PVC pipe with a plumbers elbow bend so it will be a L shape. Port will be front facing beneath the two drivers in a column.

Hand drawn (lol) pictures attached!
Attached Images
File Type: jpg image1 (3).jpg (359.3 KB, 359 views)
File Type: jpg image2.jpg (386.2 KB, 345 views)
  Reply With Quote
Old 3rd December 2017, 08:32 AM   #4
TBTL is offline TBTL  Germany
diyAudio Member
 
Join Date: Oct 2013
Two things:
- a sharp 90 degree bend will cause chuffing (plumbers elbows are sharp)
- ports like to have some breathing distance at their ends, at least their diameter
  Reply With Quote
Old 3rd December 2017, 08:36 AM   #5
grahamgraham is offline grahamgraham  United Kingdom
diyAudio Member
 
grahamgraham's Avatar
 
Join Date: Oct 2016
Location: London
Interesting, thanks. I will look in to a smoother shape bend.

What would be the negative effects of the relatively short port clearance in this cabinet?

Quote:
Originally Posted by TBTL View Post
Two things:
- a sharp 90 degree bend will cause chuffing (plumbers elbows are sharp)
- ports like to have some breathing distance at their ends, at least their diameter
  Reply With Quote
Old 3rd December 2017, 08:38 AM   #6
grahamgraham is offline grahamgraham  United Kingdom
diyAudio Member
 
grahamgraham's Avatar
 
Join Date: Oct 2016
Location: London
Quote:
Originally Posted by TBTL View Post
Two things:
- a sharp 90 degree bend will cause chuffing (plumbers elbows are sharp)
- ports like to have some breathing distance at their ends, at least their diameter
For a shorter port I could use a 75mm port diameter but the port velocity shoots up to 22ms. Is this way too high?
Attached Images
File Type: png Screenshot (3).png (73.4 KB, 334 views)
  Reply With Quote
Old 3rd December 2017, 11:26 AM   #7
Brian Steele is offline Brian Steele  Grenada
diyAudio Member
 
Join Date: Nov 2007
You should be fine with a right-angled bend and a particle speed of 12.5m/s

At 22m/s, you are going to see some vent compression effects. This may not be readily audible however, unless perhaps you're playing test tones.

The proximity of the inside end of the vent to the nearby walls will lower the effective resonance frequency a bit. Be prepared to measure Fb and to trim the vent if necessary.
__________________
www.diysubwoofers.org
  Reply With Quote
Old 3rd December 2017, 11:49 AM   #8
straight8s is offline straight8s  Canada
diyAudio Member
 
Join Date: Apr 2017
Those are a great value subs and very versatile, cubes or miniature tapped horns, just one plays quite loud and deep and give bigger subs a run. For HT and music consider anarchy boxes. Anarchy Tapped Horn DIY Sound Group Search mad mike anarchy sub there are more helpful plans out there.

Its littlemike, I saved the trouble LittleMike's Anarchy Tapped Horn - Home Theater Forum and Systems - HomeTheaterShack.com

There is 3 versions inside projects Volvotreter Homepage
19hz dual 6" The Tangband 19Hz Tapped Horn – Volvotreter Homepage

Last edited by straight8s; 3rd December 2017 at 12:09 PM.
  Reply With Quote
Old 3rd December 2017, 11:55 AM   #9
straight8s is offline straight8s  Canada
diyAudio Member
 
Join Date: Apr 2017
This box design looks interesting Earthquake Sound
  Reply With Quote
Old 3rd December 2017, 12:06 PM   #10
Brian Steele is offline Brian Steele  Grenada
diyAudio Member
 
Join Date: Nov 2007
Quote:
Originally Posted by straight8s View Post
This box design looks interesting Earthquake Sound
That's an interesting design. The penultimate section of the vent seems to be a bit larger than required, but I'll bet that's not only to house the amp, but perhaps to act as a small resonance chamber to damp organ-pipe effects caused by the long vent.
__________________
www.diysubwoofers.org
  Reply With Quote

Reply


Dual Tang Band 6.5" BRHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tang Band Tang Band W8Q-1071F 8 X 12 box reccomendation permo Subwoofers 216 9th June 2018 08:57 PM
Tang Band W4 Bamboo and tiny tang band tweeter? Jeremy067390 Full Range 2 30th March 2017 02:11 AM
WTD: Tang Band W3-1878 and Tang Band W4-1337SDF smallangryboy Swap Meet 3 10th September 2013 06:49 PM
dual 4" tang band bamboo in box norman bates Swap Meet 1 15th March 2010 10:53 AM
Questions about the Tang Band W8Q-1071F 8"x12" Subwoofer MyNameIsJake Subwoofers 4 26th January 2008 02:57 AM


New To Site? Need Help?

All times are GMT. The time now is 04:20 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki