Best Blu-ray Movie Deals

Best Blu-ray Movie Deals, See All the Deals »
Top deals | Price drops  
 All countries United States United Kingdom Canada Germany France Spain Italy Japan
Rampage (Blu-ray)
$9.99
 
Paul, Apostle of Christ (Blu-ray)
$15.50
 
The Invisible Man: Complete Legacy Collection (Blu-ray)
$18.99
 
Chappaquiddick (Blu-ray)
$14.99
 
The House of the Devil (Blu-ray)
$8.99
22 hrs ago
Halloween 4K (Blu-ray)
$13.00
 
Venom 4K (Blu-ray)
$29.99
 
Oculus (Blu-ray)
$6.99
 
A Quiet Place (Blu-ray)
$14.99
 
The Martian (Blu-ray)
$9.99
22 hrs ago
Alpha (Blu-ray)
$19.99
 
Mission: Impossible - Fallout (Blu-ray)
$19.99
46 min ago
What's your next favorite movie?
Join our movie community to find out


Image from: Life of Pi (2012)

Go Back   Blu-ray Forum > Audio > Audio Theory and Discussion


Reply
 
Thread Tools Display Modes
Old 10-21-2009, 01:19 AM   #1
Canada Canada is online now
Blu-ray Knight
 
Canada's Avatar
 
Mar 2007
Victoria, BC
17
778
25
41
Default What are the way's receivers can be power rated?

I only know of one.

All channels driven which I belive is the best way to rate watts.

But why amd what are the other reasons of rating watts from a receiver or amps.
  Reply With Quote
Old 10-21-2009, 06:37 AM   #2
HiDefRev HiDefRev is offline
Active Member
 
HiDefRev's Avatar
 
Sep 2009
State of Relativity
35
Send a message via Yahoo to HiDefRev
Default Power ratings

There are basically as many ways to rate power as there are stars in the sky. 1 channel driven, 2 channels driven, etc. Then there are different levels of Total Harmonic Distortion for each of the above - 10%, 1%, 0.1%, etc., etc. Then there is the PMPO method ( Peak Momentary Power Output - NEVER trust this method ) that measures a very short burst of power, as opposed to continuous power. Then there is the method of using different amounts of resistance ( 8 ohm, 4 ohm, etc. ) And I am sure that I have probably left something out. The most reliable would be - " X watts continuous, with all channels driven at less than 0.1% THD, into 8 0hms ( or 4 ohms, if that is the resistance of your speakers )". But, some manufacturers like to fudge the figures as much as they can.........
  Reply With Quote
Old 10-21-2009, 11:44 AM   #3
Fors* Fors* is offline
Moderator
 
Fors*'s Avatar
 
Jan 2009
Positioning myself in front of the crease, getting slashed behind the knees by Billy Smith! :(
145
130
11
Default

I agree with HiDefRev, as a lot of times the rating you see or quoted are only with one or two channels driven. Quite often, people overlook this fact, thinking they are getting all 140 watts for each channel, when pushing all 7. Since there is no "standard", this all becomes how to market the receiver, unfortunately.
  Reply With Quote
Old 10-21-2009, 02:23 PM   #4
richteer richteer is offline
Blu-ray Samurai
 
richteer's Avatar
 
Jun 2007
Kelowna, BC
1
Send a message via AIM to richteer
Default

Quote:
Originally Posted by forsberg21 View Post
I agree with HiDefRev, as a lot of times the rating you see or quoted are only with one or two channels driven. Quite often, people overlook this fact, thinking they are getting all 140 watts for each channel, when pushing all 7. Since there is no "standard", this all becomes how to market the receiver, unfortunately.
On this side of the Atlantic anyways. When I lived in the UK (10 years ago now!), consumer law stated that amplifier ratings must be in RMS WPC into 8 Ohms, both channels driven (ratings into other loads may also be given). In these days of multichanel amps, I would imagine that the definition has been modified to "all channels driven".
  Reply With Quote
Old 10-21-2009, 02:29 PM   #5
Steve Steve is offline
Blu-ray Knight
 
Steve's Avatar
 
May 2008
Jacksonville, FL
54
318
41
Default

Quote:
Originally Posted by richteer View Post
On this side of the Atlantic anyways. When I lived in the UK (10 years ago now!), consumer law stated that amplifier ratings must be in RMS WPC into 8 Ohms, both channels driven (ratings into other loads may also be given). In these days of multichanel amps, I would imagine that the definition has been modified to "all channels driven".
I would love to see such a requirement here as it would make it much easier to compare different receivers/amps by the specs alone.
  Reply With Quote
Old 10-21-2009, 02:43 PM   #6
rded rded is offline
Blu-ray Ninja
 
rded's Avatar
 
Aug 2008
555 Naim Street
254
1
Default

Quote:
Originally Posted by richteer View Post
On this side of the Atlantic anyways. When I lived in the UK (10 years ago now!), consumer law stated that amplifier ratings must be in RMS WPC into 8 Ohms, both channels driven (ratings into other loads may also be given). In these days of multichanel amps, I would imagine that the definition has been modified to "all channels driven".
Oh so true Rich! I wish this would be a universal consumer law. Besides,(you and I both know this all too well)- POWER ISN'T EVERYTHING!
  Reply With Quote
Old 10-21-2009, 04:03 PM   #7
richteer richteer is offline
Blu-ray Samurai
 
richteer's Avatar
 
Jun 2007
Kelowna, BC
1
Send a message via AIM to richteer
Default

Quote:
Originally Posted by fireman325 View Post
I would love to see such a requirement here as it would make it much easier to compare different receivers/amps by the specs alone.
Agreed, although I should point out that an amplifier's power rating is absolutely no indication of its sound quality, and that's really the only parameter that matters!
  Reply With Quote
Reply
Go Back   Blu-ray Forum > Audio > Audio Theory and Discussion

Similar Threads
thread Forum Thread Starter Replies Last Post
Power Conditioner VS Power Strip/Monster VS Panamax Home Theater Construction umich08 6 02-09-2010 08:03 AM
Receiver Query: More Power, or Less Power w/ Amp? Receivers Rubicon 10 10-25-2009 09:36 PM
Max Input Power vs Suitable Amp Power Range Audio Theory and Discussion T DUB 0 10-18-2009 03:26 AM

Tags
all channels driven, power rated, watts

Thread Tools
Display Modes

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


All times are GMT. The time now is 04:48 AM.