high efficency 5" midrange - Page 4 - 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 28th January 2013, 11:25 AM   #31
diyAudio Member
 
vacuphile's Avatar
 
Join Date: Apr 2011
Location: Not where whatever I am looking for is at.
Andrew,

Take for example a 5 inch midrange, circumference is about .4 meter, corresponding to a wavelength of 875 Hz. Above this frequency, the driver will move from 4pi to 2pi radiation. This is a gradual shift, so at let's say 1600 Hz, the driver will radiate in the shape of a forward lobe. Outside that lobe, the driver will radiate less energy than inside, but it is a continuum of course. Hence the custom to demarcate the boundary of the lobe where SPL has fallen by a set number of dB.

Now, cross it over to a tweeter, which typically is much smaller. It will radiate in 4pi at crossover, so at different listening agles, the SPL will be constant.

So, now you have two drivers @ crossover, the middriver that has a gradual shift in SPL in function of listening angle, and the tweeter that has a constant SPL at different listening angles. Result: you can only get a flat FR at one specific listening angle.
__________________
Everything is somewhere. Where the @!#$ is it.
  Reply With Quote
Old 28th January 2013, 12:21 PM   #32
diyAudio Member
 
Join Date: Nov 2009
Location: Birmingham, UK
I find the easiest way to deal with that is to remember that once the diameter = 1 wavelength the drivers dispersion will have narrowed to 90deg (this quite independent of the cone shape) and use a tweeter with a 90deg waveguide.
  Reply With Quote
Old 28th January 2013, 02:03 PM   #33
Account disabled at member's request
 
Join Date: Mar 2011
Location: Somewhere in Quebec
Quote:
Originally Posted by wintermute View Post
I'd be pretty pleased about being able to go to 126L with WAF being taken into consideration

Tony.
Thanks moondog, will read the thread for sure. This audio hobby keeps on getting more and more interesting.
Yeah, 126L is quite big and my WAF situation was risky I can say. In fact, its more like she do not agree but now the wood is cut so there'S no turning back, shell get use to it!
  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
Using 12" guitar element as high efficiency midrange? Elias Multi-Way 53 30th June 2014 02:23 AM
WTB: 5" high quality midrange drivers tomstearns Swap Meet 0 20th September 2011 12:25 AM
high efficiency midrange tsmith1315 Car Audio 15 15th March 2009 11:02 PM
8" high efficency woofers - NEED HELP Miha Multi-Way 9 28th February 2007 01:43 PM
looking to build a high efficency, small speaker. demogorgon Multi-Way 29 20th December 2005 07:46 PM


New To Site? Need Help?

All times are GMT. The time now is 06:27 AM.


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