Basreflex tube cut with 45 degree angle? - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 6th August 2016, 10:25 AM   #1
diyAudio Member
 
Join Date: Jan 2007
Default Basreflex tube cut with 45 degree angle?

Hi

What happens when you cut the basreflex tube at an 45 degree angle on the inside of the box?

The tube will have different lengths, how does that effect the behavior of the tube.

What about different cutting angles, how does that influence the output of the tube.

best regards

uwe

Last edited by heinz1964; 6th August 2016 at 10:25 AM. Reason: spelling
  Reply With Quote
Old 6th August 2016, 01:32 PM   #2
JMFahey is offline JMFahey  Argentina
diyAudio Member
 
JMFahey's Avatar
 
Join Date: Mar 2009
Location: Buenos Aires - Argentina
No big deal.

Truth is, *length* by itself is not *the* main parameter, ,itīs not an organ pipe, but airmass inside it, and no matter how you cut the end, you will still have one definite mass of air inside.

Of course, when drawing cabinet plans or even calculating tuning, itīs far more practical for the builder to specify "use a 2" diameter by 4" long tube" than "use a tube which holds 2 grams of air" or whatever but in fact tube geometry already implies that.
__________________
Design/make/service musical stuff in Buenos Aires, Argentina, since 1969.
  Reply With Quote
Old 8th August 2016, 05:09 PM   #3
diyAudio Member
 
Patrick Bateman's Avatar
 
Join Date: Oct 2006
Location: San Diego
I've been doing this for a while.

One neat side effect of cutting the port tube at an angle is that it works similar to a flared port. (Because the area is greater when you cut at an angle)
  Reply With Quote
Old 8th August 2016, 09:24 PM   #4
diyAudio Member
 
Join Date: Nov 2007
A tube cut at a 45 degree angle should produce an Fb that's slightly less than the same tube of the same average length cut at 90 degrees.
__________________
www.diysubwoofers.org
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can I mount a 5R4WGA at a 10 degree angle? djn Tubes / Valves 33 28th February 2016 02:41 PM
Amp sounds better at 45 degree angle ... Minion Instruments and Amps 15 8th January 2012 04:57 PM
Cutting 45 degree angles kornnylike Construction Tips 16 6th January 2012 07:25 AM
Roundoff Baffle vs 45 Degree x2percentmilk Construction Tips 2 20th April 2010 12:54 AM
Calculations for 2ohm into 1200w @ a 60 degree load phase angle. ? Fanuc Solid State 0 26th December 2007 01:25 AM


New To Site? Need Help?

All times are GMT. The time now is 04:07 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Đ1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki