KEF B139 as subwoofer - Page 3 - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 16th November 2011, 08:07 AM   #21
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
First question, does your Teac support 4ohm loads? It should say on the back or in the manual.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 16th November 2011, 08:13 AM   #22
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 pinkmouse View Post
First question, does your Teac support 4ohm loads?
2nd question: Does it need to? 1 8 ohm B139 on the left channel and the other on the right channel.

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 16th November 2011, 08:18 AM   #23
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
True, but I was starting at the beginning as he asked for simple answers.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 16th November 2011, 08:38 AM   #24
awty is offline awty  Australia
diyAudio Member
 
awty's Avatar
 
Join Date: Aug 2011
Location: Redliffe QLD
O sh!t already confused me.

it say 4-16ohms TEAC AS-100 | Owners Manual, Service Manual, Schematics, Free Download | HiFi Engine
I'm not after miracles, just something reasonable that wont blow anything up.

Thanks
  Reply With Quote
Old 16th November 2011, 08:56 AM   #25
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Okay, it does support 4ohm loads, that makes it simple. Take two bits of two core wire, run one between the two speakers, connecting plus to plus, and minus to minus. Take your other bit of wire, and connect one end to a speaker as well, leaving the other connections undisturbed. That should be all you need to do, connect up the amp and away you go.

But you can check your wiring by taking the loose wire that would run to the amp, and connecting a 9V battery to the ends. Both cones should move outwards from the basket, in your case towards each other into the gap in the middle of the enclosure. If not, swap wires around 'till they do. Simple.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 16th November 2011, 09:31 AM   #26
awty is offline awty  Australia
diyAudio Member
 
awty's Avatar
 
Join Date: Aug 2011
Location: Redliffe QLD
Hmmm I get the first bit joining the two speakers, then you say you take one wire and join it to either speaker and join the other end to one channel on the amp?
What if I want to switch back to stereo to maybe run a tweeter on the remote speaker source? Will that still work?

Sorry I did warn you I am a bit thick.
  Reply With Quote
Old 16th November 2011, 10:53 AM   #27
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Yes, and no without building other bits.

Here's a pic
Attached Images
File Type: png wiring.png (15.7 KB, 159 views)
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 16th November 2011, 11:09 AM   #28
diyAudio Member
 
Join Date: Aug 2011
Why run it off one ch on a stereo amp? You'll get roughly the same power as running stereo but with higher distortion and music is generally recorded in stereo, so while bass is typically without stereo content that is not always the case and you may end up only getting half the tune. If the amp is only receiving a mono bass signal then I would agree off one ch is better, but if stereo I'd run one sub per ch.

Also have you thought about running one driver inversed to cancel driver nonlinearities? Can't see if you have space to do so, but just a thought.
  Reply With Quote
Old 16th November 2011, 11:18 AM   #29
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Yes, there are lots of ways you could do it, but awty wanted something quick and simple to test the enclosure, which is what I illustrated.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 17th November 2011, 12:26 AM   #30
awty is offline awty  Australia
diyAudio Member
 
awty's Avatar
 
Join Date: Aug 2011
Location: Redliffe QLD
Thanks Al pictures are good.

Baron Groog if you can show me how to wire in stereo I could give that a go to. The speaker is module, just held together by screws, so I can turn one speaker provided the distances aren't critical. How do you wire that and is that a better set up?

Thanks guys I'm getting much better bass and I'm hearing (and feeling) Meg's Kicker on White Stripes Destijl.
  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
KEF b139 sp1212 data? Tomac Multi-Way 3 22nd December 2007 06:13 AM
building speakers with kef b139 freo Multi-Way 29 7th February 2007 07:10 PM
KEF B139 for sub woofer kennyb Subwoofers 3 7th January 2004 10:45 AM
Kef B139 ... TugaTweaker Swap Meet 0 3rd January 2004 10:22 PM


New To Site? Need Help?

All times are GMT. The time now is 10:52 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