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

PA Systems A forum for discussion of all parts of a sound reinforcement or DJ system: loudspeakers, mixers (desks) etc.

All passive zero power system
All passive zero power system
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 4th March 2020, 11:16 PM   #11
Mark Tillotson is offline Mark Tillotson
diyAudio Member
 
Join Date: May 2018
Location: Cambridge UK
Quote:
Originally Posted by Michael Bean View Post
I was referring to what you said, "an all passive audio amplifier"...there is no such thing, for amplification to occur, you need an additional power source to amplify, there's no free lunch.

You are assuming _power_ amplification is the only sort we talk about - it isn't. A transformer can serve as an MC preamp section, giving voltage amplification completely passively. Mechanical amplification can be done passively with levers gears etc, so long as its position or velocity of force amplification rather than power amplification.


Amplification is about making some physical quantity bigger, and not all physical quantities are conserved like energy/power. In electronics we talk about voltage amplification, current amplification and power amplification - most commonly active, but sometimes passively. Power amplification of course requires active components, but the other sorts are sometimes passively boosted with transformers or switched capacitors, etc.


[ actually switched capacitor networks are interesting in that the power is not supplied/amplified by the switching device, but rather only routed by them, hard to say if this is best thought of as active or passive ]
  Reply With Quote

Reply


All passive zero power systemHide 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
Which 12'' to mate with the ATC dome in a passive system? leifislive Multi-Way 22 27th January 2017 08:22 PM
New passive PA system, very confused gullis PA Systems 18 4th October 2016 02:34 PM
f3 of passive radiator-system MCPete Multi-Way 12 29th February 2008 10:47 PM
Equalize a passive bi-amp system Sony Solid State 1 1st September 2005 02:54 PM
using a 4 ohm passive xo...in an 8 ohm system.. ChesterFuzzin' Multi-Way 2 22nd May 2002 03:27 AM


New To Site? Need Help?

All times are GMT. The time now is 04:25 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki