Distance between tweeter and mid - 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 14th December 2004, 04:20 PM   #1
Sony is offline Sony  Europe
diyAudio Member
 
Join Date: Sep 2004
Location: Europe
Default Distance between tweeter and mid

Hello again!

Will reducing the distance between tweeter and mid-range drivers in a 3 or 4 ways design have a significant impact on sound?
How about the risk of magnetic interference between mid and mid-range driver?
Should one try to put them as close as possible or perform some testing to find the right distance?

Thanks in advance for the help.
  Reply With Quote
Old 14th December 2004, 04:59 PM   #2
diyAudio Member
 
Join Date: Sep 2004
Location: Central California
Generally, the closer the better. A single point source is ideal, but not possible with multi-driver systems. The closer you can get them, the better. Of course, it also depends on listening distance. If you are in an auditorium, then 30cm or so between drivers will be no problem, but if you are 1 meter from them, then a separation of 30cm will sound like 2 point sources. Dont worry about magnetic interaction, as the stray field isnt used. Also, a vertical orientation is prefered.
  Reply With Quote
Old 15th December 2004, 01:07 PM   #3
rabbitz is offline rabbitz  Australia
diyAudio Member
 
rabbitz's Avatar
 
Join Date: Jul 2003
Location: Newcastle, Australia
Maximum distance between the tweeter and mid should be the wavelength (W in metres=345/frequency) of the crossover frequency but the higher xo the less chance there is of achieving it. Get 'em as close as you can.
  Reply With Quote
Old 15th December 2004, 05:37 PM   #4
nuppe is offline nuppe  Sweden
diyAudio Member
 
nuppe's Avatar
 
Join Date: Aug 2003
Location: Gothenburg
I agree with the previous posters, but i just wanted to add some personal experience:

I tried making a prototype speaker with a big distance between mid and tweeter. The idea was to time align the "acoustic centers" of the drivers using a shallow (and wide) cone shape around the tweeter (to minimize diffraction). With the drivers this far apart (25 cm center to center), it's clearly audible that the sound is coming from two separate speakers. At about 2,5-3 meters it gets harder to tell, but nearfield it is somewhat distracting. I decided to skip the cone idea because of this and use digital delay instead to time align the drivers. The next rebuild will have them as close as possible. I should add that i cross pretty low (2 kHz, maximum distance is about 17,5 cm), but it's still a problem.

/Andreas
  Reply With Quote
Old 15th December 2004, 11:28 PM   #5
diyAudio Member
 
Join Date: Dec 2004
Location: alabama
i feel your pain on trying to physically time align the drivers while still conforming to the wavelength rule. i tried a couple different ways of doing it with a conventional cabinet but never liked the result. im thinking i need to take up wielding so i can make a baffleless (sp?) frame work (kinda like what vandersteen does) and mount the drivers in that. unfortunately, however, i am both too poor and pressed for time to pull it off right now. but the idea is always in the back of my head... lurking.
  Reply With Quote
Old 11th June 2006, 11:22 AM   #6
diyAudio Member
 
Join Date: Jan 2006
Location: South West
Send a message via MSN to blacktone
Sorry if this is slightly off topic, but I need some help .

Space constraints in my bedroom mean that I need to stack a non-magnetically shielded speaker (from a panasonic mini system which I'm going to use as a loud alarm clock) on top of my Eltax Monitor IIIs (which have a magnetically shielded tweeter at the top, but non-shielded woofer). Will magnetic interference degrade sound quality / damage either of the speakers? From this thread so far, it seems like a feasible set up.

Opinions please!

Many thanks in advance.
  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
Distance from amp s important? mitchyz250f Car Audio 19 2nd July 2008 06:15 AM


New To Site? Need Help?

All times are GMT. The time now is 09:59 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