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

Multi-Way Conventional loudspeakers with crossovers

Mltl Design With Scanspeak
Mltl Design With Scanspeak
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 January 2006, 03:47 PM   #1
kkchunghk is offline kkchunghk  Hong Kong
diyAudio Member
 
Join Date: Oct 2004
Default Mltl Design With Scanspeak

Hi,

After the excellent explanation provided by Scottmoose on the TL work sheets here,

http://www.diyaudio.com/forums/showt...0&pagenumber=3

there is really no excuse not to try out some designs. My starting point is the thor. I checked out the excel drivers here and thought otherwise ¡V the drivers are not cheap and the only shop that sells them is not particularly helpful. So I have my eyes on these two fellas from scanspeak:
S2905/970000
18S/8535-00
Turns out they are cheaper and, from the graphs at least, have flatter response than the excels. I also see Scottmoose¡¦s point about the folded pipe design of the thor and so I opt for a MTM arrangement in a MLTL box with the port at the bottom front.
Attached Images
File Type: jpg fig1.jpg (51.9 KB, 200 views)
  Reply With Quote
Old 23rd January 2006, 03:48 PM   #2
kkchunghk is offline kkchunghk  Hong Kong
diyAudio Member
 
Join Date: Oct 2004
L=49¡¨ (1244mm)
So=Sl=3Sd
Where Sd=2x145cm2=290cm2
So the cross section is 870cm2 or about 290mmx290mm.
This is a bit big for my living room.
So what if I have only one 18S/8535-00 unit in the MLTL design:
Attached Images
File Type: jpg fig2.jpg (10.0 KB, 186 views)
  Reply With Quote
Old 23rd January 2006, 03:49 PM   #3
kkchunghk is offline kkchunghk  Hong Kong
diyAudio Member
 
Join Date: Oct 2004
L=42¡¨(1067mm)
So=Sl=4Sd
Where Sd=145cm2 , 4Sd=580cm2
So the cross section is 189mmx307mm for a golden section.
The SPL is lower, but the roll off is similar.

Here is another attempt with 970000 and a different mid/bass driver:
15S/8531K01
The box design is a MTM.
Attached Images
File Type: jpg fig3.jpg (10.0 KB, 181 views)
  Reply With Quote
Old 23rd January 2006, 03:50 PM   #4
kkchunghk is offline kkchunghk  Hong Kong
diyAudio Member
 
Join Date: Oct 2004
L=48¡¨(1219mm)
So=Sl=2.8Sd
Where Sd=2x95cm=190cm, 2.8Sd=532cm
That makes 181mmx294mm for a golden section.
Now the last two boxes are more or less the same size and the roll off is similar.
The problem is I have not got a chance to actually LISTEN to drivers. Am I to believe that the 5 1/4¡¨ driver can pump the bass as well as the 6 1/2¡¨. Anyway, the logical choice here seems to be the S2905/970000 + 1x18S/8535-00 if I can live with a SPL of 87dB. But I¡¦m told that the 15S is a smoother operator. So if I¡¦m to choose an all rounder then it is not so clear cut, money aside. Is there anything else I missed or should be considering? Glad to hear from the more experienced.
Cheers,
K K
  Reply With Quote

Reply


Mltl Design With ScanspeakHide 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
Mark Audio Alpair 10 MLTL Design Jim Griffin Full Range 210 5th April 2012 01:11 AM
Help with MLTL design for GPA416-8c zeljkor Multi-Way 62 14th January 2010 09:11 PM
MLTL design review request bzdang Multi-Way 9 25th March 2008 03:49 PM
TL or MLTL design for PHY-HP? JrM Full Range 4 31st May 2006 09:33 PM


New To Site? Need Help?

All times are GMT. The time now is 01:01 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki