dB/W/M conversion - M vs 0.5 M ?? - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 26th December 2007, 02:08 AM   #1
MadMutt is offline MadMutt  Australia
diyAudio Member
Join Date: Nov 2006
Default dB/W/M conversion - M vs 0.5 M ??

After many hours of hunting, I found some very basic specs on a set of drivers I'm intersted in.

BUT, they are quoting the sensitivity as 97 dB/W/0.5 M

So, is it possible to convert this to the more common dB/W/M ??

Even if someone can give me a vague idea of what they could come out as I'd be gratefull.

Doubt it matters but just in case;
The speakers are actually a set of car audio seperates.
Peerless P822000

  Reply With Quote
Old 26th December 2007, 06:12 AM   #2
Nanook is offline Nanook  Canada
diyAudio Member
Nanook's Avatar
Join Date: Feb 2004
Location: Chinook Country.Alberta
Default er I think this is the relationship....

intensity varies as 1/R, where R is the distance in meters (or feet) from the source.



so at .5 metres the intensity will be 4 X's as much at 1 metre.

and a power factor of 10 is needed to double the apparent loudness

what does this mean to you? At 1W@1m, you will be effectively lowering the sensitivity to 91dB.

stew -"A sane man in an insane world appears insane."
  Reply With Quote
Old 26th December 2007, 06:33 AM   #3
MadMutt is offline MadMutt  Australia
diyAudio Member
Join Date: Nov 2006
Maaany thanks.

Exactly the info I was after.

Wasn't expecting an answer for days.
  Reply With Quote
Old 26th December 2007, 12:51 PM   #4
Svante is offline Svante  Sweden
diyAudio Member
Svante's Avatar
Join Date: Feb 2004
Location: Stockholm
Subtract 6 dB per distance doubling.
Simulate loudspeakers: Basta!
Simulate the baffle step: The Edge
  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
SVC to DVC conversion madstamm Subwoofers 8 13th January 2008 04:45 PM
24 to 18 bit conversion ??? Lyra Digital Source 13 9th March 2006 02:03 PM
9v to 12v conversion purprobe Parts 2 17th September 2005 09:37 PM
rca conversion oogared Tubes / Valves 3 3rd September 2005 05:48 PM
PCM to DSD conversion liz Digital Source 6 2nd October 2003 08:53 AM

New To Site? Need Help?

All times are GMT. The time now is 08:23 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2