Hi-fi boss slams 'rip-off' industry: Article in Techradar - Page 3 - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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
Closed Thread
 
Thread Tools Search this Thread
Old 5th January 2013, 04:56 PM   #21
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
Quote:
Originally Posted by SY View Post
Reread your post and my analysis. PEAKS.



No, I didn't. Reread what I wrote.
ironic

I said 'they probably mean PMPO or something' Peak Music Power Output, which is included in the very line the 2 of you seems to quote and disagree with.

it doesnt take a 500W rated amp to put out 500W peaks. maybe i'm oldschool, I rate my amps RMS.

Quote:
500W peaks needed for normal listening levels? I think its this guy thats uninformed. maybe he means PMPO
 
Old 5th January 2013, 04:56 PM   #22
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Agree Qusp.
__________________
...Shape the sound , Man!
 
Old 5th January 2013, 04:59 PM   #23
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
Quote:
Originally Posted by qusp View Post
it doesnt take a 500W rated amp to put out 500W peaks. maybe i'm oldschool, I rate my amps RMS.
How many dB will you get peak, over the rated RMS value? A lot, or a little?
 
Old 5th January 2013, 05:03 PM   #24
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Quote:
Originally Posted by qusp View Post

it doesnt take a 500W rated amp to put out 500W peaks. maybe i'm oldschool, I rate my amps RMS.
You need a 500W amp to put out 500W (average) peaks unless you have something with terrible dynamic regulation and very low idle current. If you want to count only the tips of non-recurring peaks, then 250WRMS will get you there, or you could just add 3dB to my numbers to get back to 500W.

The point remains, the numbers suggested in that article are not at all ridiculous unless you like peak clipping and limiting or only listen to limited dynamic range material.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
 
Old 5th January 2013, 05:08 PM   #25
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
i'll tell you when I finally finish the new amps/speakers =) depends on the final bias (percentage class A) I go for and I wont know that till i'm finished. I use a fully regulated SMPS for the mid-bass and Sub-bass which will put out short term burst/peak power thats ~20-25% higher than constant and i'm running tri amped with digital XO, with Class A on Midbass, Class D on Sub bass and high bias AB or A on highs. i've probably got way more available power than I actually need. but I have the power to choose the gain yet

new system, new speakers, new address

so maybe its me thats not normal =)

Sy, you keep on misquoting me, I said and have kept on saying it was ridiculous to claim that is normal, for normal listening levels, not that 500W is ridiculous

Last edited by qusp; 5th January 2013 at 05:15 PM.
 
Old 5th January 2013, 05:13 PM   #26
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
What's abnormal about 77-80 dB average SPL? If anything, that's pretty quiet by audiophile standards.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
 
Old 5th January 2013, 05:18 PM   #27
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
I don't see where SY has misquoted you at all. He just saying that a 500W amp is not outside the realm of normal. I certainly don't need 500W of amp (more like 5W) but folks with large rooms and inefficient speakers might.

If your average power is 3W, then you'd need a 500W amp to stay out of clipping on most dynamic recordings. I don't think most of us run at 3W average power, but it's possible.
__________________
Take the Speaker Voltage Test!
 
Old 5th January 2013, 05:20 PM   #28
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
your example was using unusually dynamic material (not for you I know, but for the unwashed, lets call them normal people), with slightly lower than average efficiency speakers, in larger than average rooms. basically an example framed to make it seem reasonable, every factor slightly (the program material heavily) weighted in one direction
 
Old 5th January 2013, 05:22 PM   #29
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Well, if you're listening at 3M with average efficiency speakers, 3W average is not unlikely. Not everyone has huge horns like you (and your speakers, for that matter).
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
 
Old 5th January 2013, 05:26 PM   #30
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
True SY, and that's why the numbers can vary so wildly.

Qusp - I have a lot of rock/pop CDs with an RMS to peak value of 25dB or more. Of course big band and classical recording are normally like that, but they aren't alone. Of course anything in the past few years is squashed, but older releases are not.
__________________
Take the Speaker Voltage Test!
 

Closed Thread


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
Good Article on Vintage vs New Hi Fi Equipment BeatleFred Solid State 0 21st October 2012 03:17 AM
Where Do you see the audio industry going from here? peanut123 The Lounge 6 17th December 2009 09:30 PM
What does industry etch with richie00boy Everything Else 12 3rd September 2007 06:07 PM
Interesting article on industry vs audiophiles. protos Everything Else 0 18th March 2005 01:06 PM
Does anybody work in the industry/related industry? eRiCdWoNg Everything Else 5 25th August 2004 08:38 AM


New To Site? Need Help?

All times are GMT. The time now is 12:35 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2