test how many watts your speakers use - AVS Forum
Forum Jump: 
 
Thread Tools
Old 06-16-2012, 12:18 AM - Thread Starter
Advanced Member
 
cookieattk's Avatar
 
Join Date: Jun 2011
Posts: 572
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 34 Post(s)
Liked: 60
http://www.diyaudio.com/forums/multi-way/204857-test-how-much-voltage-power-do-your-speakers-need.html


pretty simple.
cookieattk is offline  
Sponsored Links
Advertisement
 
Old 06-16-2012, 12:53 AM
Advanced Member
 
arande2's Avatar
 
Join Date: Jan 2007
Location: Omnipresent
Posts: 508
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Too simple, if you ask me tongue.gif

I know what music I listen to has the lowest loudness vs. transient levels, which is some percussive music. I don't have enough sensitivity/amp (2.83v/8ohm/91dB/1m - amp rated 150w, 12x15x9ft room) to listen to it at my absolute loudest levels, by a lot. Conversely, I have some modern "loudness war" tracks (Death Magnetic) that leave me 3-4dB peak headroom at my loudest levels.

I also know that since movies are standardized to the same mixing levels (although newer releases seem to be louder - there is clipping on the Waiting For A Train scene in Inception) and have a higher dynamic range (debatable I guess), the power requirements are different because music varies from person to person while movies are more standardized (and yes, I know many don't watch at reference). Personally, my loudest music levels require about 10x the power from my main channels as my loudest movie levels.

All debatable, I guess rolleyes.gif

...
arande2 is offline  
Old 06-16-2012, 01:11 AM - Thread Starter
Advanced Member
 
cookieattk's Avatar
 
Join Date: Jun 2011
Posts: 572
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 34 Post(s)
Liked: 60
Quote:
Originally Posted by arande2 View Post

Too simple, if you ask me tongue.gif
I know what music I listen to has the lowest loudness vs. transient levels, which is some percussive music. I don't have enough sensitivity/amp (2.83v/8ohm/91dB/1m - amp rated 150w, 12x15x9ft room) to listen to it at my absolute loudest levels, by a lot. Conversely, I have some modern "loudness war" tracks (Death Magnetic) that leave me 3-4dB peak headroom at my loudest levels.
I also know that since movies are standardized to the same mixing levels (although newer releases seem to be louder - there is clipping on the Waiting For A Train scene in Inception) and have a higher dynamic range (debatable I guess), the power requirements are more robust.
All debatable, I guess rolleyes.gif

it measures your peak levels that u listen to.
cookieattk is offline  
Old 06-16-2012, 01:25 AM
Advanced Member
 
arande2's Avatar
 
Join Date: Jan 2007
Location: Omnipresent
Posts: 508
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Quote:
Originally Posted by cookieattk View Post

it measures your peak levels that u listen to.

Which, in my case, would be in clipping if I were to try the test as described.

...
arande2 is offline  
Old 06-16-2012, 01:33 AM - Thread Starter
Advanced Member
 
cookieattk's Avatar
 
Join Date: Jun 2011
Posts: 572
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 34 Post(s)
Liked: 60
Quote:
Originally Posted by arande2 View Post

Which, in my case, would be in clipping if I were to try the test as described.

shouldnt its -12db
cookieattk is offline  
Old 06-16-2012, 07:17 AM
AVS Addicted Member
 
Bill Fitzmaurice's Avatar
 
Join Date: Nov 2009
Location: New Hampshire
Posts: 10,214
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 1684
Not as simple as modeling the speaker with design software, which will tell you the displacement limited power, the voltage swing required to get there, and the dB levels produced when you do.
arande2 likes this.

Bill Fitzmaurice Loudspeaker Design

The Laws of Physics aren't swayed by opinion.
Bill Fitzmaurice is online now  
Old 06-16-2012, 07:51 AM
AVS Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 16,852
Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 566 Post(s)
Liked: 1170
+1 to bill's post. then perform a spectral analysis of the content in order to see what the peak to average difference is. we tend to set the "volume" at the average value, but in order not to compress anything, you need to allow headroom for the peaks. how much compression we can hear is debatable, but if you don't want any with a well recorded track, you might need 15-20db of headroom. most folks don't listen at much more than 100db at the listening position average, which is why the "rule of thumb" for an accurate system starts around 115-120db at the listening position.

Listen. It's All Good.
LTD02 is offline  
 
Thread Tools


Forum Jump: 

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