What's with all the leaks and holes in Lowther recommended designs? - 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 2nd March 2011, 08:33 AM   #1
Squeak is offline Squeak  Denmark
diyAudio Member
 
Squeak's Avatar
 
Join Date: Jul 2007
Location: Frederiksberg
Default What's with all the leaks and holes in Lowther recommended designs?

Lowther Home Page

Looking at the recommended plans on the Lowther site, they almost all seem to share the feature of having multiple paths of the sound. More often than not with with holes and unclosed CC and paths. It's almost as though they want ML-TQWT and horn loading in one design.
Any explanations on this, and why it isn't seen more often?

Edit apparently I can't hotlink to the page, but it's the front pages upper middle panel, with the "cabinet plans" link I'm referring to.

Last edited by Squeak; 2nd March 2011 at 08:39 AM.
  Reply With Quote
Old 2nd March 2011, 10:22 AM   #2
hm is offline hm  Europe
diyAudio Member
 
hm's Avatar
 
Join Date: Feb 2004
Location: near Hamburg Germany
squeak,
built it, make a measurement, specially impedanz, than close the extra path,
make a new measurement of imp, than you understand what happend and if this make
sence, i dont think so that why i constructed until 1980 my own Lowther horn,
my double horns are the top of feasibility now.
look my HP with measurements, plans and feedbacks in comparison to other here often
mentioned constructions, if you find real measurements.
__________________
http://www.hm-moreart.de
  Reply With Quote
Old 3rd March 2011, 09:28 AM   #3
DrBoar is offline DrBoar  Sweden
diyAudio Member
 
DrBoar's Avatar
 
Join Date: Apr 2003
Location: Stockholm
they start as resonant pipes and then you add chambers and vents to tame the worst peaks by trial and error is my guess...
I bought TP-1 drawings from Lowther years ago, not only did the horn have negative flare accorrding to the drawings, the different parts did not add up. So not only erroneous in flare but also inconsistent. If I wanted to spend a lot of money on a full range driver I would rather spend it on SEAS that Lowther, or a wide range 8" PA driver if I want to play really loud with a 8" driver in a BLH. I have heard the Schmacks horn both with Lowther and JBL 2110 and there was no comparison, the JBLs was much better. Calling the Accolade 2 a folded horn is a joke, it is bunch of resonance producing chambers and vents...
  Reply With Quote
Old 3rd March 2011, 11:57 AM   #4
Squeak is offline Squeak  Denmark
diyAudio Member
 
Squeak's Avatar
 
Join Date: Jul 2007
Location: Frederiksberg
Let me just make it clear that Im not looking to buy Lowther drivers (don't have the money and I don't think their value for money ratio is that good), Im only interested in the construction of some of the boxes on the site.

Look at the Bicor 200, 2000 and the Fidileo, they all have structures that seem to exactly combine ML-TQWT (with negative taper) and regular horns.
Can you really have your cake and eat it too?
It would seem the two methods would fill in each others weaknesses better than just two horns of unequal length.
  Reply With Quote
Old 3rd March 2011, 12:17 PM   #5
hm is offline hm  Europe
diyAudio Member
 
hm's Avatar
 
Join Date: Feb 2004
Location: near Hamburg Germany
Hello Squeak,
do you read the KORNETT double horn measurements?
kornettmess
if you have a question ask me before you write please.
My experience with Lowther enclosure shows, the extra path reduce a bit
the bad impedanz of the enclosure,
as you see by my double horns i elimenate it more or less.
best shown by the Subfanfare real single imp and real sum.
fanfaremess
__________________
http://www.hm-moreart.de
  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
Recommended Speaker Amp Designs? impedelikeaboss Class D 2 8th November 2010 01:30 AM
Recommended designs rockgardenlove Tubes / Valves 16 12th November 2008 01:32 PM
Recommended Altec 604 Cabinet Designs jekman Multi-Way 8 2nd February 2008 02:27 AM
recommended shielded 2-way speaker designs? scone Multi-Way 18 16th November 2004 07:28 AM


New To Site? Need Help?

All times are GMT. The time now is 10:59 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