Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

Pop to speakers when power strip is shut off
Pop to speakers when power strip is shut off
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 4th October 2011, 12:00 AM   #1
JBLastCall is offline JBLastCall
diyAudio Member
Join Date: Oct 2011
Default Pop to speakers when power strip is shut off

I posted this under power supplies, but thought I would put it under amps, too, since it relate to a PA header.

Here's the scenario: PA system with guitar effects boards and vocal mics attached. The volume is up on the PA. One of the effects boards is attached to the PA and plugged into a power strip that is on. I was asked to pull the cord out of the power strip. I didn't - I shut the power strip off. There was a small pop (and yes, ANY pop can damage the speakers - I know this!). I got yelled at for being stupid. My understanding was that switching the power strip off was the exact same thing as pulling the plug (meaning, there would have been a pop if I pulled the plug out, too, since the volume was still up on the head). However, my partner tells me no - the pop was caused by the actual snap of the on/off switch on the power strip. I KNOW the right thing would have been to turn down the volume on the PA before doing anything, but let's not go there. Can someone please let me know if this is a fact or an assumption? Would there still have been a pop if I pulled the cord out of the strip if the volume was still turn up on the PA head?
  Reply With Quote
Old 4th October 2011, 12:14 AM   #2
Enzo is offline Enzo  United States
diyAudio Member
Join Date: Sep 2004
Location: Lansing, Michigan
Breaking the circuit turns off the power. A switch does that, so does pulling out a plug. Depending upon where in the cycle the mains power is when the circuit opens, a spark may fly. If you switch off at zero crossing, not much happens. If you break at one of hte peaks, the inductance of the transformer and other things make the maximum pop.

SO yes, it COULD pop as much either way, and if you do it just once each way, there is a very real possibility that one way will pop louder than the other way that time. But do it each way a bunch of times, and the overall response will b e the same.

In a solid state amp, the pop is limited by the power rails, so a pop will be no louder than the amp at clipping. If the speakers can handle the full power of the amp, they can handle the pop. The speakers really don;t know the difference between that pop and a full kick drum spike or for that matter a full on snare crack.
  Reply With Quote


Pop to speakers when power strip is shut offHide 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
Need to make sequential power strip digital desire Solid State 1 20th July 2007 01:57 PM
DIY Power Strip audioart Power Supplies 4 28th May 2005 04:27 PM
Please Help - amp pop, shut down bonz Solid State 1 30th April 2005 11:08 PM
incredible power strip on the cheap! dorkus Everything Else 32 16th December 2002 09:41 PM

New To Site? Need Help?

All times are GMT. The time now is 05:53 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio