Custom made passive x-overs - diyAudio
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 19th December 2008, 10:53 PM   #1
diyAudio Member
 
Join Date: Dec 2004
Location: Southeastern Michigan
Default Custom made passive x-overs

Anyone know where I can get passive x-overs made ?

I need a 2-way (500Hz) and a 3 way (333Hz and 1.8kHz) hopefully w/ something steeper than 12 db/ octave.
  Reply With Quote
Old 19th December 2008, 11:15 PM   #2
diyAudio Member
 
Join Date: Aug 2008
Looking for Crossover design service
  Reply With Quote
Old 20th December 2008, 05:51 PM   #3
sejati is offline sejati  Indonesia
diyAudio Member
 
Join Date: Dec 2008
Send a message via Yahoo to sejati
Default Custome made passive x-over

I can make design for those cross over, for reasonable price for you, But please give information what driver do you want to use, moreover if you have the datasheet of those driver, so design will be based on the data. Otherwise I will find the datasheet over the internet by driver type you have.
  Reply With Quote
Old 20th December 2008, 06:11 PM   #4
diyAudio Member
 
Join Date: Jun 2004
Location: Green Bay, WI
Send a message via AIM to John_E_Janowitz Send a message via MSN to John_E_Janowitz Send a message via Yahoo to John_E_Janowitz
The problem is that there is much more to a crossover than getting the right points and slopes because a driver is not a purely resistive load, nor does it have a perfectly flat response curve. You need to take into account the impedance curve and measured response. This is determined not only by the driver, but the enclosure, placement on the baffle, etc. You need to take into account phase between drivers which is determined by their placement with relation to the other drivers, etc.

There is also a lot more than getting just a flat frequency response. You need good phase coherency throughout the crossover region. The ONLY way to do that properly is to build your enclosure, mount the drivers and then used the measured response and impedance curves to simulate, build, and then verify the crossover. Flipping the polarity on a driver and looking for deep nulls at the crossover point is a good first indicator of a correct phase relationship. You also need to look at off axis measurements, impulse response and CSD. Small changes in component values won't have a significant effect on frequency response most of the time, but they can have a fairly significant effect on phase. Getting the phase correct in a crossover is IMO as important or even more important than getting response correct. It's very possible to have a flat response curve but for things to not sound at all right.

John
  Reply With Quote
Old 21st December 2008, 06:54 PM   #5
sejati is offline sejati  Indonesia
diyAudio Member
 
Join Date: Dec 2008
Send a message via Yahoo to sejati
Yup, as for me I always design for in-phase to all driver. especially for those in x-over point. Event for designing those different location driver, different phase lead-lag must took into consideration.
  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
Need a some custom aluminum enclosures made triden Everything Else 5 27th November 2007 02:29 PM
Active vs. Passive X-overs Pete H Multi-Way 60 7th June 2005 05:08 PM
custom made soft bridges nobody special Everything Else 15 14th May 2003 05:07 AM
Help a new guy out with some weird 3 way passive x overs meltmanbob Multi-Way 3 29th March 2003 11:07 AM


New To Site? Need Help?

All times are GMT. The time now is 10:17 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