Passive to active conversion software - Page 2 - diyAudio
Go Back   Home > Forums > Design & Build > Software Tools

Software Tools SPICE, PCB CAD, speaker design and measurement software, calculators

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 21st May 2012, 09:50 PM   #11
Simon B is offline Simon B  United Kingdom
diyAudio Member
 
Join Date: Dec 2011
Location: North-East England
Quote:
Originally Posted by Davey View Post
The link in Post #3.

Dave.

That's labelled "SPL" in the top right hand corner. It's not an electrical transfer function. It appears to be a plot of SPL output of the two driver units used against frequency, given a constant voltage electrical input. They won't let the OP do what he was wanting to.
__________________
Engineer: One who can do for 10 shillings what any fool can do for 10 pounds.
  Reply With Quote
Old 21st May 2012, 10:19 PM   #12
Davey is offline Davey  United States
diyAudio Member
 
Join Date: Dec 2001
Location: Bremerton, WA.
It's a SoundEasy plot of an electrical transfer function. The "SPL" is just labeling from that program since it uses the same plotting graph for all measurements, either acoustic or electrical. In the SoundEasy measuring suite the 90db line is referencing to zero db difference between reference and measurement channels on the soundcard input....ie, if you performed a loopback connection it would be a straight line at 90db on the graph.

It's also much too smooth to be a real, acoustic measurement.

If I understood the OP's original query correctly, I believe it's exactly what he's interested in.

Cheers,

Dave.
  Reply With Quote
Old 22nd May 2012, 01:06 AM   #13
Simon B is offline Simon B  United Kingdom
diyAudio Member
 
Join Date: Dec 2011
Location: North-East England
Quote:
Originally Posted by Davey View Post
.....It's also much too smooth to be a real, acoustic measurement. .....

You're quite right about that, though I was thinking that it's much too smooth to be a real electrical measurement.

Hope I haven't been unnecessarily baffling the OP

(Covering my back now) "Properly labelled graphs would have been nice"
__________________
Engineer: One who can do for 10 shillings what any fool can do for 10 pounds.
  Reply With Quote
Old 22nd May 2012, 01:40 AM   #14
Simon B is offline Simon B  United Kingdom
diyAudio Member
 
Join Date: Dec 2011
Location: North-East England
Yes, I think I've really f***ed up here. Worse than that I've managed to do it with such arrogance and aplomb that I've stopped anyone else from spotting it until now.

My sincere apologies samadhi, and thanks Davey for spotting it.
__________________
Engineer: One who can do for 10 shillings what any fool can do for 10 pounds.
  Reply With Quote
Old 22nd May 2012, 03:07 AM   #15
AllenB is offline AllenB  Australia
diyAudio Member
 
Join Date: Oct 2008
It's all good Simon, we humans do that from time to time
Here's the available before and after plot. I appears to agree with the transfer function (ignore the red line on the transfer function plot, the 0dB line appears to be 10dB higher).

Samadhi, I wouldn't normally settle for a crossover based on a single axis when more are available. There's a polar plot or two on the ZD5 page which Zaph appears to have given some consideration.

Based on the limited available information you will need to take your measurements at zero degrees for creating the transfer functions, then when you are finished, to listen to the speakers toed in to meet in front of your listening position.
  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
Which Steps for Conversion from a passive to an active equalization Network ?? tiefbassuebertr Full Range 0 6th December 2011 10:51 PM
passive to active cross over conversion? owenhamburg Multi-Way 8 16th November 2009 01:41 AM
Port to Passive Radiator conversion focal7C Multi-Way 3 30th January 2008 10:44 PM
dB loss by using passive crossovers? Active vs Passive and 1st vs 4th order Hybrid fourdoor Multi-Way 3 11th July 2004 09:16 PM
passive i/v conversion with tda1545 DonJuan Digital Line Level 1 5th December 2003 05:05 PM


New To Site? Need Help?

All times are GMT. The time now is 12:42 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