Measuring my speakers - 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 15th September 2012, 06:06 PM   #1
diyAudio Member
 
lduarte1973's Avatar
 
Join Date: Feb 2009
Location: Lisbon
Default Measuring my speakers

my first mesurement with mic only , im still waiting for spl meter , what does this graph tell me ? from 10 khz up its flat and ill leave above 200hz ill deal with it later
Attached Images
File Type: jpg mesurement 1.jpg (86.9 KB, 514 views)
__________________
Hey ! just because im getting bald doesnt mean i cant like hair metal
  Reply With Quote
Old 15th September 2012, 06:41 PM   #2
puppet is offline puppet  United States
diyAudio Member
 
Join Date: Dec 2011
Location: The Dells, WI
By the look of the FR I'd say you were singing "Ol Danny Boy"

:P
  Reply With Quote
Old 15th September 2012, 06:54 PM   #3
diyAudio Member
 
lduarte1973's Avatar
 
Join Date: Feb 2009
Location: Lisbon
sorry i dont understand
__________________
Hey ! just because im getting bald doesnt mean i cant like hair metal
  Reply With Quote
Old 15th September 2012, 07:38 PM   #4
puppet is offline puppet  United States
diyAudio Member
 
Join Date: Dec 2011
Location: The Dells, WI
... just a bad joke.
  Reply With Quote
Old 16th September 2012, 12:05 AM   #5
tvrgeek is offline tvrgeek  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Md
What you have not told us is what the measurement conditions are. Is this far field? It is gated MLS type? Pink noise? Sweep? How far away is the mic? Is the mic calibrated?

Every combination of measurements tells us something different. What the above graph tells me is your sound card works. Without understanding what you are measuring and how, it tells me nothing else. Are the speakers ported or sealed? In line with the tweeter or woofer?

Wondering , why do you want an SPL meter? Not very useful for speaker design and tuning.
  Reply With Quote
Old 16th September 2012, 01:39 AM   #6
diyAudio Member
 
Melo theory's Avatar
 
Join Date: Sep 2009
Location: Gulfport fl.
Quote:
Originally Posted by puppet View Post
By the look of the FR I'd say you were singing "Ol Danny Boy"

:P
haha!
__________________
I LIKE YOU
  Reply With Quote
Old 16th September 2012, 01:47 AM   #7
Banned
 
Join Date: Nov 2006
Do you have a crossover at 600Hz?
If so it looks like you might need to reverse the polarity of one of your drivers
  Reply With Quote
Old 16th September 2012, 12:05 PM   #8
diyAudio Member
 
lduarte1973's Avatar
 
Join Date: Feb 2009
Location: Lisbon
hi everybody , this mesurement is in my room , the mic is in my listening music position (sofa) .i will have my calibrated mic and calibrated spl meter this week , this was just my first mesurement , the mic is 2.5 meters away from the speakers 45 off axis
__________________
Hey ! just because im getting bald doesnt mean i cant like hair metal

Last edited by lduarte1973; 16th September 2012 at 12:08 PM.
  Reply With Quote
Old 16th September 2012, 12:25 PM   #9
tvrgeek is offline tvrgeek  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Md
You are measuring the room, not the speaker. Measure at about 300mm and at 1M and see what the changes are. You still did not tell us how this was made. Is it an MLS pulse ( go download ARTA ) or is this pink noise, or is it a sweep. Each method is useful for different things. Unless the speaker is on a 30 foot pole in the air, you are measuring the room.

To understand measuring, pick up a copy of Measuring Loudspeakers ( clever name eh? ) by Joe D-Apolitto.

If you are not doing health and safety inspections, I don't know what a calibrated SPL meter is good for. I have one. I think the only thing I used it for in the last 10 years was to show a local bar owner he was endangering his employees health by letting bands control their own volume. Never used it for speaker design.
  Reply With Quote
Old 16th September 2012, 12:45 PM   #10
diyAudio Member
 
lduarte1973's Avatar
 
Join Date: Feb 2009
Location: Lisbon
its a sweep with rew smoothed 1/6 octave , ecm8000 behringer mic , minidsp 4x10
Attached Images
File Type: jpg mesure.jpg (73.2 KB, 423 views)
__________________
Hey ! just because im getting bald doesnt mean i cant like hair metal

Last edited by lduarte1973; 16th September 2012 at 12:48 PM.
  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
Help in measuring speakers ARIYAHOOR Multi-Way 34 17th October 2012 06:38 PM
Measuring Ported Speakers ilardi Multi-Way 15 25th February 2012 09:14 PM
Question on measuring speakers gedlee Multi-Way 16 15th November 2011 11:13 PM
Measuring a speakers efficiency pjpoes Multi-Way 14 30th January 2009 03:35 PM
Need some guidance on measuring speakers mazeroth Multi-Way 4 25th January 2006 05:19 PM


New To Site? Need Help?

All times are GMT. The time now is 11:46 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