Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Back loaded horn plans
Back loaded horn plans
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 29th October 2019, 01:59 AM   #1
duder1982 is offline duder1982  United States
diyAudio Member
 
duder1982's Avatar
 
Join Date: Jan 2012
Location: Nebraska
Default Back loaded horn plans

Hello,

I was eyeballing something along the lines of the Fostex P1000 Back loaded horn from Madison Sound. I thought I would check here first to see what other options are. I have the tools to build my own cabinets, I would just need plans and driver recommendation. I will be using a DAC-Linestage of some sort (I've got 2 already build)-MC2505. This will be used in my office. I prefer bookshelf.

Thanks in advance.
__________________
If I cant build it or fix it I really dont want it.
  Reply With Quote
Old 29th October 2019, 03:13 AM   #2
chrisb is offline chrisb
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Bookshelf & (effective) BLH would seem to me to be a bit of an oxymoron. If you find that general size of enclosure and driver appealing for this particular application, I think you could do far better if a bit more depth of enclosure is possible. Start with a look at the Woden Baby Lab series - well proven designs for a wide range of drivers in this “weight class”. I built a few of them myself, and even though my sojourn down the primrose path of FR/ single systems started almost 20 years ago with antecedents of the current FE103, of the Fostex models taste tested to date, I tend to prefer the FF85 & 105WK over them.
There are of course other brands from which to prepare a short list - Mark Audio, ScanSpeak, Peerless, Dayton, etc.
Let the games begin...
__________________
Technology honors no Hippocratic oath
  Reply With Quote
Old 29th October 2019, 03:46 AM   #3
zman01 is offline zman01  Bangladesh
diyAudio Member
 
Join Date: Feb 2011
Location: Dhaka
Back loaded horn plans
Good point Chris on the BLH and DT.

The Baby Labs come to mind for cabinet designs with similar dimensions/proportions. There are also good options in the P10 Mar-Ken catalog.
  Reply With Quote
Old 29th October 2019, 06:19 AM   #4
planet10 is offline planet10  Canada
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Back loaded horn plans
I am familiar with that ‘horn”. It is really a badly designed TL. As Chris suggested you would be far ahead with one of the Baby Labs.

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 29th October 2019, 12:26 PM   #5
duder1982 is offline duder1982  United States
diyAudio Member
 
duder1982's Avatar
 
Join Date: Jan 2012
Location: Nebraska
I wasn't looking for a back loaded horn at the time, but came across it when I stumbled across their other FR speaker kits. I liked Madison Sound's price point for the FR bookshelf, then stumbled upon the back loaded version and thought, if I spend my $150 budget on drivers, then I could build some nice cabs. That being said, I am willing to look at more options for FR speakers. I am going to take a look at the Baby Labs design.
__________________
If I cant build it or fix it I really dont want it.
  Reply With Quote
Old 29th October 2019, 02:23 PM   #6
duder1982 is offline duder1982  United States
diyAudio Member
 
duder1982's Avatar
 
Join Date: Jan 2012
Location: Nebraska
Folks, those plans are exactly why I came here. Thanks sharing..now to decide which driver, as they all seem to be available through Madison and at reasonable prices, which makes the decision harder. If anyone has recommendations of one over the other, I would like to hear your thoughts.

Couple questions if you dont mind. I noticed that you refer to these designs as T-line. Is that due to the expansion of the port vs a horn of some sort? I also noticed that these are rear ported vs front. What does one gain from that, (I assume better bass extension)? Any reason to go 3" over 4"? Thanks again folks.
__________________
If I cant build it or fix it I really dont want it.
  Reply With Quote
Old 29th October 2019, 03:07 PM   #7
Scottmoose is offline Scottmoose  United Kingdom
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
A horn is a pipe that expands toward the terminus. This one has so little expansion & the terminus is so undersized relative to the axial QW length that it simply acts as a resonant pipe across its passband and is never impedance matched in its operating BW.

There is no 'port' in the labyrinths or the P1000. There is a line terminus; not quite the same thing. I generally prefer (I design the labyrinths in question) rear termini for a variety of reasons; reduced construction complexity, slightly superior coupling to boundaries and it also helps suppress any unwanted midband leakage.

As far as drivers go, depends what you like. The FF85wk is a nice little unit, as are the Alpairs. There is no fixed answer to this unfortunately.
__________________
"'That'll do", comes the cry of the perfectionist down the ages.' James May -The Reassembler
www.wodendesign.com Community sites www.frugal-horn.com http://frugal-phile.com/
  Reply With Quote
Old 29th October 2019, 06:07 PM   #8
planet10 is offline planet10  Canada
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Back loaded horn plans
Thinking back to all the Baby Labs i have drawn for Scott, i think i would first look at the Alpair 6.2p (or the metal version if you want more top).

FF85/105wk are also good.

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 29th October 2019, 06:47 PM   #9
Scottmoose is offline Scottmoose  United Kingdom
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
The 6P was a nice little unit. Sadly, it's had its encounter with Madame Guillotine, and is no longer with us. AFAIK it just wasn't economical to produce for the quantities sold. The 6M is often overlooked but worth considering also.
__________________
"'That'll do", comes the cry of the perfectionist down the ages.' James May -The Reassembler
www.wodendesign.com Community sites www.frugal-horn.com http://frugal-phile.com/
  Reply With Quote
Old 29th October 2019, 06:52 PM   #10
chrisb is offline chrisb
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Duder - at the risk my assuming that you’re at the early stages of research and analysis of the numerous enclosure types that might suit your application, don’t reach the conclusion that the manifold design of the Baby Labs series, or similar compact enclosures is solely for the purpose of shortening the height of enclosure, or that driver placement is irrelevant.

If you’re looking for specific recommendations for drivers, it’s no secret I’m a big fan of the FF85WK or Alpair6.2 paper for very near-field use (i.e. sitting either side of computer screen & listening usually well less than 1 meter).For further distances I’d suggest the FF105WK, or Alpair7.3, or 7ms, or Pluvia 7. Dave and Scott have probably dozens of enclosure designs to chose from for this short list of drivers -which can vary in size and build complexity somewhat.

Gentlemen, start your engines...
__________________
Technology honors no Hippocratic oath
  Reply With Quote

Reply


Back loaded horn plansHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Front loaded and back loaded horn DrWoofer.com Subwoofers 14 12th April 2016 09:32 PM
Plans for stereo back loaded horns kodomo Full Range 1 23rd January 2015 01:12 PM
Combination of Back-loaded Horn and Fron loaded horn?! ARIYAHOOR Full Range 26 1st June 2012 10:20 PM
FE208E Sigma Back Loaded Horn Plans mill23bay Full Range 11 28th August 2011 12:45 AM
fostex 206e back loaded horns plans spades Multi-Way 1 4th January 2004 06:36 PM


New To Site? Need Help?

All times are GMT. The time now is 04:10 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki