amplifier reactive load testing - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 20th February 2008, 11:35 AM   #1
d3imlay is offline d3imlay  United States
diyAudio Member
Join Date: Sep 2004
Location: Ohio
Default amplifier reactive load testing

I need a model of a full range speaker to do some reactive load testing on an amplifier.
  Reply With Quote
Old 20th February 2008, 11:47 AM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
Pass and ESP have published some info on this.
regards Andrew T.
Sent from my desktop computer using a keyboard
  Reply With Quote
Old 20th February 2008, 03:55 PM   #3
gootee is offline gootee  United States
diyAudio Member
Join Date: Nov 2006
Location: Indiana
Blog Entries: 1
Don't forget to also model the speaker cables.

I found what seemed like some good modeling information at:

There is a (dual) speaker model, there, too, IIRC.

There are also some 'standard' amplifier tests that use a capacitor in parallel with a resistor, for the load, driven by squarewaves. Typically, the capacitance is up to 2.2 uF in parallel with 8 Ohms, IIRC. But don't forget to also try smaller capacitances. I have seen cases where 2.2 uF looked fine but 0.1uF made it oscillate.

Also, remember that with squarewaves for the input, everything will depend on their rise and fall time. There is a recent thread about that, here:

square wave testing and slew rate
The electrolytic capacitors ARE the signal path:
  Reply With Quote
Old 21st February 2008, 03:41 PM   #4
diyAudio Member
Speedskater's Avatar
Join Date: Sep 2002
Location: Lakewood, Ohio
Arny K. did one some years ago. Try:
  Reply With Quote


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
Reactive Load Tests? EnvisionAudio Solid State 20 28th November 2011 08:17 AM
A simple active DC dummy load for PSU testing Bootstrapper Power Supplies 42 17th August 2008 09:57 PM
Amplifier Testing east electronics Solid State 36 23rd April 2007 05:46 PM
Amplifier testing Eccu Solid State 13 7th August 2002 11:05 AM

New To Site? Need Help?

All times are GMT. The time now is 08:12 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2