Help building 3 way crossover - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 1st July 2008, 08:22 PM   #1
diyAudio Member
Join Date: Jul 2008
Default Help building 3 way crossover

Hi all. First id like to say what a great community you all have here. Keep up the good work!!

Anyways... on to my problem.

I have a set of speakers that i use for DJing down beaches and out door parties that i would like to add a crossover to. The speakers are made up of a combination of 2 (its a long story).

They arent worth spending much money on so a cheap first order crossover is ideal.

The speakers cabinets each have 2 120watt 4ohm 8" drivers and a tweeter. The drivers are not the same. One sounds alot more bassier and aboutt 15% quieter than the other eventhough the impedence is the same. I assume the tweeters are piezo as they came with no capacitor attached and i have used them for years without troubles. Is there a way to tell if its a piezo or not?

Id like to add a crossover that: filtered only the bass to the bottom driver; filtered bass and mid to the top driver and reduce volume 15% if possible; filter treble to the tweeter(if its not a piezo).

I understand that there is an art to making crossovers and its hard to advise without knowning the speakers, but im just after a rough and ready crossover as that what the speakers are.

Any help would be great. I live in the UK, what is the best place to ge this stuff?


  Reply With Quote
Old 1st July 2008, 08:27 PM   #2
Did it Himself
diyAudio Member
richie00boy's Avatar
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Are the speakers the same left and right, just different drivers in each cab?

Does the midrange driver share the same cabinet volume as the bass?

Are the cabs sealed or vented?
__________________ my website for UK diy audio people - designs, PCBs, modules and more.
  Reply With Quote
Old 1st July 2008, 08:31 PM   #3
diyAudio Moderator
Cal Weldon's Avatar
Join Date: Jan 2004
Location: Near Vancouver
Hi Liam,

Any pictures?

Piezos are very light as there is no magnet on them but require a different sort of crossover than dynamic tweeters. They are usually a plastic horn type. They can be used without any XO.

How were the two woofers wired? Hopefully in series as the 4 ohm load drops to 2 ohms if in parallel. It may be that one is a woofer and one is a wide range to cover the vocals. Although and XO is preferable, it may be that they sound OK by running them full range. You can't easily change the amount of sound coming from a woofer, you usually pad down the tweeter if it's too bright. Also, if they are in series then you can't pad down just one. If you want to separate the sound so only one woofer gets the bass, then you can run them in parallel and divert the lows and highs as you wish. That being said, we can't just give you some parts list without knowing the Thiel/Small parameters of the drivers and also the exact impedance at the intended XO point. You might be best off leaving them as is.

EDIT: typing while richie was.
planet10 needs your help:
Let's help Ruth and Dave
  Reply With Quote
Old 2nd July 2008, 06:23 AM   #4
diyAudio Moderator Emeritus
Iain McNeill's Avatar
Join Date: Oct 2007
Location: Santa Cruz, California
Is there something about these speakers that you don't like? Tell us what you'd like to achieve.

There's just so much you could do...
  Reply With Quote


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
best practices in building a crossover doug20 Multi-Way 3 9th July 2009 07:45 AM
Building a Crossover wolfsvein Multi-Way 2 22nd January 2009 03:39 AM
building my first crossover jaygeorge1979 Multi-Way 27 28th November 2007 04:36 AM
help building a 3 way crossover harrisni Multi-Way 6 25th September 2006 03:50 PM
Crossover building question shaunly Parts 0 8th September 2005 05:31 AM

New To Site? Need Help?

All times are GMT. The time now is 02:06 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2