taking a W3-871S to 80 hertz - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 7th February 2006, 06:54 PM   #1
Douwe is offline Douwe  Netherlands
diyAudio Member
 
Join Date: Feb 2006
Location: Groningen, Netherlands
Exclamation taking a W3-871S to 80 hertz

Hello everyone,

I want to build my own computerspeakers and was thinking of a vented box with 1 or 2 tangband W3-871S in them. I think I want to put the -3dB point at around 80 hz but don't know if this can destroy those tangbands because its FS is 110hz.
  Reply With Quote
Old 7th February 2006, 07:11 PM   #2
diyAudio Member
 
Join Date: Oct 2005
Hello
In Cyburgs "Brick" or "Needle" the bass goes down to about 50hz with the W3-871S

greetings Tom
  Reply With Quote
Old 7th February 2006, 07:30 PM   #3
diyAudio Member
 
leadbelly's Avatar
 
Join Date: Dec 2002
Location: Calgary, Alberta
Default Re: taking a W3-871S to 80 hertz

Quote:
Originally posted by Douwe
I think I want to put the -3dB point at around 80 hz but don't know if this can destroy those tangbands
You've not stated the most important consideration: How loud will you play them? Are they PC speakers or for a full room?
__________________
Aerodynamics are for people who can't build engines. Enzo Ferrari
  Reply With Quote
Old 7th February 2006, 07:57 PM   #4
Douwe is offline Douwe  Netherlands
diyAudio Member
 
Join Date: Feb 2006
Location: Groningen, Netherlands
Thanks Tom but do you also know how these speakers sound? Are the lower frequencies not almost fully produced by the bass pipe? And if this is so how does it sound ???
  Reply With Quote
Old 7th February 2006, 07:57 PM   #5
Douwe is offline Douwe  Netherlands
diyAudio Member
 
Join Date: Feb 2006
Location: Groningen, Netherlands
I'm going to use them as PC speakers and with 12 watt they won't go harder then 97dB if I should use one speaker.
  Reply With Quote
Old 7th February 2006, 08:42 PM   #6
diyAudio Member
 
leadbelly's Avatar
 
Join Date: Dec 2002
Location: Calgary, Alberta
Quote:
Originally posted by Douwe
I'm going to use them as PC speakers and with 12 watt they won't go harder then 97dB if I should use one speaker.
I think you'll run out of excursion long before you get 94dB @ 80 Hz out of the TB's. Look at their efficiency and Xmax numbers. But are you being realistic? Do you listen to your PC speakers at 97dB?
__________________
Aerodynamics are for people who can't build engines. Enzo Ferrari
  Reply With Quote
Old 7th February 2006, 08:57 PM   #7
diyAudio Member
 
Bob Brines's Avatar
 
Join Date: Jan 2003
Location: Hot Spring Village AR
Something that is apparently not well understood is that drivers mounted in BR's and TL's run out of excursion one octave above cut-off. That means you are going to get all of your distortion starting at 160 Hz if you are going for 80 Hz F3. Those distortion products are going to appear at 300 Hz and above. This is the problem with using a 3" full-range driver as anything but a mid-tweeter. I think that you should be happy with 80 dB for a pair of 871's, and this means the speakers 2-3 feet from your head.

Bob
  Reply With Quote
Old 7th February 2006, 11:59 PM   #8
soongsc is offline soongsc  Taiwan
diyAudio Member
 
soongsc's Avatar
 
Join Date: Mar 2005
Location: Taiwan
Quote:
Originally posted by Bob Brines
Something that is apparently not well understood is that drivers mounted in BR's and TL's run out of excursion one octave above cut-off. That means you are going to get all of your distortion starting at 160 Hz if you are going for 80 Hz F3. Those distortion products are going to appear at 300 Hz and above. This is the problem with using a 3" full-range driver as anything but a mid-tweeter. I think that you should be happy with 80 dB for a pair of 871's, and this means the speakers 2-3 feet from your head.

Bob
This that based on listening or measurements?
__________________
Hear the real thing!
  Reply With Quote
Old 8th February 2006, 10:42 AM   #9
Douwe is offline Douwe  Netherlands
diyAudio Member
 
Join Date: Feb 2006
Location: Groningen, Netherlands
I have looked at a design called the brick(with one W3-871S driver) and this one is cut of at around 60hz and there is a peak at 120hz...... Speaker projects with Tangband W3-817S: Needle and Brick are these harmonics easy to hear? My objective is to make two cheap pc speakers. Ofcourse I want them to sound as good as is possible for the price i'm willing to pay.
  Reply With Quote
Old 8th February 2006, 02:45 PM   #10
diyAudio Member
 
Bob Brines's Avatar
 
Join Date: Jan 2003
Location: Hot Spring Village AR
Quote:
Originally posted by soongsc


This that based on listening or measurements?

This is based on observation and theory. ALL resonant enclosures have a peak in the excursion plot one octave above cut-off. That's the way it is. This peak excursion is what limits the maximum undistorted SPL you will get from your speaker. The maximum undistorted SPL is far lower than implied by simplistic programs like WinISP. You need to look at the excursion plot when designing speakers.

Bob
  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
Help!...it hertz crick Full Range 9 2nd July 2007 08:34 PM
Zero hertz jaberwocky6669 Multi-Way 36 16th June 2007 03:59 AM
Hertz ML-5400 D make72 Subwoofers 14 14th January 2005 04:50 PM
Difference between Hertz HS-200 and HX-200 FaZ72 Multi-Way 2 8th April 2004 01:34 PM
Hertz or Cycles? Bob2 Everything Else 10 9th June 2003 11:50 PM


New To Site? Need Help?

All times are GMT. The time now is 04:33 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2