Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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 23rd July 2004, 11:04 PM   #1
diyAudio Member
 
Join Date: Jul 2004
Location: BC, Canada
Default My Bass Horn Project (Input Welcomed:) )

I'm taking a shot at my own horn. Driver will be a single Eminence LAB12 per cabinet. This if my first time using Hornresp, so any input would be greatly appreciated. If you see something horribly wrong, please tell me, I will have a 35 Hz High pass on theese, as they will be used in PA applications. Will be running 2 per side, or 4 in the center. They will be low passed at 80Hz, as that's about where my midbass picks up. Having ISP problems right now, so images are going to have to put hosted on geocities. If the links don't work, copy and paste them into a new window.

Response in eigth space:

http://geocities.com/michaelmacwillie/response.jpg

My Input into Hornresp:

http://geocities.com/michaelmacwillie/input.jpg

All input is welcome If it looks good to you guys, I'll go ahead and do up a CAD drawing.
  Reply With Quote
Old 24th July 2004, 08:56 AM   #2
diyAudio Member
 
Join Date: Jul 2003
Location: Newcastle, Australia
Mmmm...... files not available for viewing. To have these files on Geocities, you may have to create an index.html file as per their terms of use.

Sort that out and we can take a look at the design.

Cheers
  Reply With Quote
Old 24th July 2004, 10:54 AM   #3
diyAudio Member
 
Join Date: Jul 2004
Location: BC, Canada
Hmm, wierd, works fine from here if I copy and paste it I'll make up a quick html file.
  Reply With Quote
Old 24th July 2004, 11:11 AM   #4
diyAudio Member
 
Join Date: Jul 2004
Location: BC, Canada
Here we go. Hopwfully this works.

http://www.geocities.com/michaelmacwillie/
  Reply With Quote
Old 24th July 2004, 12:57 PM   #5
diyAudio Member
 
Join Date: Jul 2003
Location: Newcastle, Australia
Yep, that worked!

Doesn't look too bad. Value of Vtc is a bit low, but this only effects top end response anyway. Quite a long path length, but this smooths the large ripples that show in the LabSub response - the Lab12 really likes to be in a 15Hz horn....

I would be inclined to increase Vrc a little just to get rid of that peak at 35Hz and smooth the rolloff.

Procede with the Cad! (BTW which cad will you be using?) and make sawdust!

PS: Check the diaphram displacement graph with different input levels to determine the power which will hit Xmax, then don't run too much more power than that into them - a few have been shredding cones in the LabSub lately by pushing them too hard.

Cheers
  Reply With Quote
Old 24th July 2004, 02:28 PM   #6
diyAudio Member
 
paulspencer's Avatar
 
Join Date: Sep 2003
Location: Melbourne, Australia
Mike,

I saw a website where a Lab12 was done in a modified version for a church. It was simplified by stretching it out into a long horn, not folded. I believe this gives a smoother response. If it can be done practically for your application then perhaps it's worth considering. I imagine it might be easier to construct.
  Reply With Quote
Old 24th July 2004, 11:11 PM   #7
diyAudio Member
 
Join Date: Jul 2004
Location: BC, Canada
Thanks for your suggestions! I will give that a go with increasing the Vrc to smooth out that ripple at 35Hz, and i'll post back in a few I am aware of thoose shredded LAB's, I read about it on the PSW forums. (I'm Michael M there.)

Paulspencer:

I have also seen that LAB12 stretchet out horn. Quite impressive! Unfortunately, it wouldnt be practical for my application, as mine need to be portable.

Mike.
  Reply With Quote
Old 24th July 2004, 11:36 PM   #8
diyAudio Member
 
Join Date: Jul 2004
Location: BC, Canada
I tried palying around with Vrc and Vtc. While i got the responce a bit flatter, I also lost a ton of power handling. that low peak is actually at 33Hz, which is below my HPF frequency (24db/oct) SHouldnt my High pass also help to bring this peak down a bit?
  Reply With Quote
Old 25th July 2004, 08:57 AM   #9
diyAudio Member
 
Join Date: Jul 2003
Location: Newcastle, Australia
With the steep hi-pass at 35Hz, combined with not a lot of signal this low anyway, then it maybe best to leave the peak if it gives you greater power handling - as usual, all these things are a matter of finding the right compromises.

I am currently working on single Beyma 12LX60 subs, slightly shorter path length, but still good to 35Hz.

Cheers
  Reply With Quote
Old 25th July 2004, 09:30 AM   #10
diyAudio Member
 
Join Date: Jul 2004
Location: BC, Canada
Cool, I'll have to keep an eye out for a thread about them



I started laying out this horn.. and I think i'm going to have to go back to the drawing board. Physical size will be huge I knew it would be big, but laying it out really put it into perspective.
  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
Advice welcomed on Homage to Aria project gr43023 Full Range 0 3rd February 2009 03:35 PM
10" driver for Bass tower in Horn project angeloitacare Multi-Way 22 29th November 2007 01:10 PM
Bass Horn project Dioda Subwoofers 4 5th May 2006 04:48 PM
how to go from horn response to a folded bass horn design? paulspencer Subwoofers 8 4th November 2005 10:44 PM
Comments on bass horn sim in horn response paulspencer Subwoofers 38 1st November 2005 08:34 PM


New To Site? Need Help?

All times are GMT. The time now is 12:15 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