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

Crossover exercise !
Crossover exercise !
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 15th September 2018, 06:00 PM   #31
Aatto is offline Aatto  United States
diyAudio Member
 
Aatto's Avatar
 
Join Date: Feb 2017
Location: Austin
Crossover exercise !
Default One more...

haha, I m not actually gonna invest into it until I get things right and i m not in a hurry, just a goal for now, anyhow I m not going to bore you with sending a crossover after another one, I will comeback when I have better understanding, one question tho, I used Jeff Bagby Crossover Design sheet this time, all 2nd order LR, at 250Hz and 2000Hz, with mentioned drivers, in JB XO sheet if I introduce 3cm z offset between tweeter and woofer (acoustic offset) and reverse the tweeter I can get rid of dip caused by the offset and get a flatish FR (work in progress) but when I simulate it in xsim, everything looks good until I add 3cm to tweeter, reversing the polarity in xsim does not behave as it does in JB XO Sheet. am I missing something here ?
sorry bout all noob Qs.
Attached Images
File Type: jpg afasfaf.JPG (318.9 KB, 74 views)
__________________
I used to be with it, but then they changed what it was, and now what Im with isnt it. And whats it seems weird and scary to me. - Grandpa Simpsons.
  Reply With Quote
Old 19th September 2018, 09:03 AM   #32
sesebe is offline sesebe  Romania
diyAudio Member
 
Join Date: Jan 2011
Location: Iasi
Going with the impedance under 4 ohm will destroy your amplifier.
Decrease C5 value and increase L5 value (L5>=8mH).
Increase L3 value and decrease C3 value.

Play with the values on these components until you get the desired shape but taking care to the impedance to be over 4ohm.
  Reply With Quote
Old 19th September 2018, 06:57 PM   #33
Aatto is offline Aatto  United States
diyAudio Member
 
Aatto's Avatar
 
Join Date: Feb 2017
Location: Austin
Crossover exercise !
I appreciate it sesebe, yes you are right, my whole approach toward this was completely wrong and I did bored people with my novice questions, but I did study more about this and will continue to, I will be back when i think i have more confidence.
__________________
I used to be with it, but then they changed what it was, and now what Im with isnt it. And whats it seems weird and scary to me. - Grandpa Simpsons.
  Reply With Quote
Old 19th September 2018, 07:03 PM   #34
Juhazi is offline Juhazi  Finland
diyAudio Member
 
Juhazi's Avatar
 
Join Date: Mar 2007
Location: Jyvskyl, Finland
Low impedance seems to be allowed, if the speaker is expensive enough, in six-digit class!
Click the image to open in full size.
__________________
Radikal aktivist AINOgradient speaker project
  Reply With Quote
Old 20th September 2018, 04:53 AM   #35
Aatto is offline Aatto  United States
diyAudio Member
 
Aatto's Avatar
 
Join Date: Feb 2017
Location: Austin
Crossover exercise !
Quote:
Originally Posted by Juhazi View Post
Low impedance seems to be allowed, if the speaker is expensive enough, in six-digit class!
haha thanks, I will start looking for Impedance/Price Tag ratio curve then .
__________________
I used to be with it, but then they changed what it was, and now what Im with isnt it. And whats it seems weird and scary to me. - Grandpa Simpsons.
  Reply With Quote
Old 20th September 2018, 09:05 AM   #36
Dave Bullet is offline Dave Bullet  New Zealand
diyAudio Member
 
Join Date: Jan 2002
Location: Wellington, New Zealand
Here's my 3 way "so far". it's taken a while to get to this point. You have to be persistent.
Attached Images
File Type: png LR2 and LR4 - 20180920.png (97.1 KB, 36 views)
__________________
"Usual diyaudio train wreck of dubious drivers and just the crossover to sort out. Well, how are you on crossovers and modelling? Pretty green, I reckon" - system7 (Steve)
  Reply With Quote
Old 20th September 2018, 09:07 AM   #37
Dave Bullet is offline Dave Bullet  New Zealand
diyAudio Member
 
Join Date: Jan 2002
Location: Wellington, New Zealand
I find 2nd order acoustic W-M provides higher impedance. I gave up on 4th order here regarding impedance. It was easier to make 2nd order work with phase tracking then 4th order impedance.
__________________
"Usual diyaudio train wreck of dubious drivers and just the crossover to sort out. Well, how are you on crossovers and modelling? Pretty green, I reckon" - system7 (Steve)
  Reply With Quote
Old 20th September 2018, 03:35 PM   #38
Aatto is offline Aatto  United States
diyAudio Member
 
Aatto's Avatar
 
Join Date: Feb 2017
Location: Austin
Crossover exercise !
Quote:
Originally Posted by Dave Bullet View Post
Here's my 3 way "so far". it's taken a while to get to this point. You have to be persistent.
Quote:
Originally Posted by Dave Bullet View Post
I find 2nd order acoustic W-M provides higher impedance. I gave up on 4th order here regarding impedance. It was easier to make 2nd order work with phase tracking then 4th order impedance.
very interesting, this helps a lot, thanks.
__________________
I used to be with it, but then they changed what it was, and now what Im with isnt it. And whats it seems weird and scary to me. - Grandpa Simpsons.
  Reply With Quote

Reply


Crossover exercise !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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Thought Exercise: Submini Circlotron OTL Amp supersonik319 Tubes / Valves 1 8th January 2013 09:09 AM
Exercise: 'the best resistor at the right place'? jeepy Parts 0 25th November 2011 03:52 PM
The little exercise of bookshelf fung Multi-Way 1 7th April 2006 09:35 AM
I've got difficulties to solve this electronic exercise Bricolo Everything Else 13 5th June 2004 03:31 PM


New To Site? Need Help?

All times are GMT. The time now is 08:41 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki