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

Checking tweeter phase
Checking tweeter phase
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 October 2005, 10:09 PM   #1
eRiCdWoNg is offline eRiCdWoNg  United States
diyAudio Member
Join Date: Jul 2003
Location: maryland, USA
Send a message via AIM to eRiCdWoNg
Default Checking tweeter phase

OK I made a real dumb move when installing some tweeters for my DIY car project. The terminals were coated with color. I soldered on a connector and then desoldered it. Now, I have no idea which one is + and which one is -. There are NO other markings or designations on the tweeter. The plugs are both the same.

Obviously I cant do the DC current from a AA sized battery because it is a 19 mm tweeter. So, I thought of another bright idea. I used my Sheffield Test Disc and tried to play thru the system some polarity pulses that show up if I record it to my computer and analyze the audioform using SoundForge. They are 3 positive followed by one negative pulse. It worked great if I directly recorded the disc to harddrive thru digital output, but I ran a microphone thru a Spirit Folio mixerboard, to my Minidisc recorder and played it thru my computer as well, but no dice. The polarity pulses no longer showed up. I then tried it with a sine wave with the negative side clipped, and those didn't show up either. I'm not sure if it was the Atrac of the minidisc player or what, but I'm out of ides here. Im gonna give it one more attempt this time using a laptop cmputer bypassing the Minidisc player.

The next best thing I can think of, is play some filtered pink noise around the X over frequency to the midrange and try flipping the phase, see if I can tell a noticeable difference in the response near the X over frequency.

Any other ideas???
  Reply With Quote
Old 1st October 2005, 11:14 PM   #2
eRiCdWoNg is offline eRiCdWoNg  United States
diyAudio Member
Join Date: Jul 2003
Location: maryland, USA
Send a message via AIM to eRiCdWoNg
Never mind, I got it. This time I programmed SoundForge onto a Laptop, skipped the Minidisc player and voila, the phase marks are distinctive.

Good news is I did find out my tweeters were out of phase. So now I can correct
  Reply With Quote
Old 2nd October 2005, 12:09 AM   #3
bogicp is offline bogicp  Yugoslavia
diyAudio Member
bogicp's Avatar
Join Date: Oct 2005

Why you dont try to wire tweeter and measure response with MLS if you have large deep in overall frequency characteristic at cross point frequency, you swap + and -

Best regards

  Reply With Quote
Old 2nd October 2005, 12:11 AM   #4
Cal Weldon is offline Cal Weldon  Canada
diyAudio Moderator
Cal Weldon's Avatar
Join Date: Jan 2004
Location: Near Vancouver
Checking tweeter phase
It should be noted that boggy's reply was in the moderation queue before Eric sorted it out, hence the wrong order.

planet10 needs your help:
Let's help Ruth and Dave
  Reply With Quote


Checking tweeter phaseHide 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
"Suppressed Mids" and tweeter / woofer phase? samtny Multi-Way 28 26th February 2008 09:41 PM
Why this tweeter phase not inverted? andy2 Multi-Way 5 14th March 2006 01:12 AM
Checking in... ghudnub Introductions 1 19th September 2005 04:58 PM
Scan speak Ring Radiator with phase plug is it better than Best of dynaudio tweeter? diysmartdeep21 Multi-Way 4 11th February 2005 10:48 AM
Has anyone taken the phase plug off the XT25 tweeter yet? madinoz Multi-Way 0 24th January 2005 06:45 AM

New To Site? Need Help?

All times are GMT. The time now is 04:21 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio