My Glass TB871 Build / Discussion - 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 28th March 2009, 06:16 AM   #1
diyAudio Member
 
Join Date: Nov 2008
Default My Glass TB871 Build / Discussion

Hello All,

If any of you have been following all my random threads all over the place I finally found stuff I can work with. My matched drivers have arrived from Dave at Planet 10.. He ships fast and packages it really nicely.
Anyhow, I found a glass bottle at IKEA. It has a internal volume of 1.5L and the glass is slightly thicker than standard wine bottles. I am planning to stuff this with fibrefill and mount the drivers in the opening. It will be completely 100% sealed.

Now my questions are whether the slightly smaller internal volume would affect my sound quality / frequency response (I believe padded can reduce volume by 10%?) also, would epoxy be a good mounting glue or silicone be better?

Thanks for following. I'll post pics.. hopefully once I get everything in place.
  Reply With Quote
Old 28th March 2009, 07:15 AM   #2
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Glad to hear the drivers arrived.

The 1st 871S drivers i ever saw were mointed in 1 litre boxes... you might not get the most bass possible out of them, but they'll be fine, Stuffing can get you 10-30%, but too much will tend to degrade the sonics,

I wouldn't use anything to attach them that you can't somehow get them out. If you aren't going to affix a small baffle to screw the drivers in with, then silicon seal would be my 1st choice.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 28th March 2009, 05:19 PM   #3
diyAudio Member
 
Join Date: Nov 2008
alright, I think I'll go with the 1.5, lightly stuffed. Going to find a plastic / hard rubber baffle to fix it with.
  Reply With Quote
Old 2nd April 2009, 08:54 PM   #4
diyAudio Member
 
Join Date: Nov 2008
Alright, my glass tubes/bottles are ready at 1.8L, they're a little over the 1.66 vas of the drivers. I think I'll need a HPF at approx 80hz. what value of capacitor will I need?

thanks
  Reply With Quote
Old 2nd April 2009, 09:15 PM   #5
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
The Fs is 110 Hz no? That means your impedance is around 12-14 ohms at 80 Hz so about a 200 mfd cap for a first order. Are you sure you want it that low? Are you using the notch filter shown?
Attached Images
File Type: jpg picture 1a.jpg (68.1 KB, 340 views)
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 2nd April 2009, 09:24 PM   #6
diyAudio Member
 
Join Date: Nov 2008
wow. you're wayy over my head. no, no notch filter at this time, this is my really simple budget speaker =) maybe i'll add it in later if I feel I need it. I guess I could go a little higher at 95 or so, I just don't want to lose any of it.
  Reply With Quote
Old 2nd April 2009, 09:44 PM   #7
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally posted by nukaidee
Alright, my glass tubes/bottles are ready at 1.8L, they're a little over the 1.66 vas of the drivers. I think I'll need a HPF at approx 80hz. what value of capacitor will I need?
Trying to do a passive at that frequency is very difficult as that is right near system resonance. Better to put a cap in front of the amplifier.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 2nd April 2009, 09:46 PM   #8
badman is offline badman  United States
diyAudio Member
 
badman's Avatar
 
Join Date: Sep 2003
Location: Sunny Tustin, SoCal
Quote:
Originally posted by planet10


Trying to do a passive at that frequency is very difficult as that is right near system resonance. Better to put a cap in front of the amplifier.

dave

Seconded. Harrison labs sells some products for this if you want adjustable/removable.
__________________
I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!
  Reply With Quote
Old 2nd April 2009, 09:47 PM   #9
diyAudio Member
 
Join Date: Nov 2008
you mean put a cap in line with the input signal before the amp?
  Reply With Quote
Old 2nd April 2009, 09:50 PM   #10
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally posted by nukaidee
you mean put a cap in line with the input signal before the amp?
Yes. I'd try it without 1st.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  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
Discussion on what materials to build speakers out of planet10 Construction Tips 865 5th April 2013 06:00 PM
DIY 5.1ch Glass DAC? ak_47_boy Digital Source 6 23rd October 2006 05:34 PM
Anyone ever build a glass cabinet? Javachip Multi-Way 14 23rd May 2006 03:27 PM


New To Site? Need Help?

All times are GMT. The time now is 02:12 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