Exact RIAA numbers? - Page 3 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 11th April 2003, 10:12 AM   #21
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
 
EC8010's Avatar
 
Join Date: Jan 2003
Location: Near London. UK
Default Accuracy

My numbers were generated from two different forms of the RIAA equation. First form was the (1 + sT) form using complex numbers, which was manipulated into a form that Lotus123 could use. Second form was the form where each time constant has a logarithmic term, and these are summed. The two forms were then compared for accuracy, and agreed to 5dp (dBs).

Further, the equations for the complex form were checked in a program written in QBASIC, and the results agreed with the spreadsheet.

The only common factor remaining is the computer itself...
__________________
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote
Old 11th April 2003, 02:54 PM   #22
Banned
 
Join Date: Feb 2002
Location: As far from the NOSsers as possible
Default The hump......

It is there, and you would probably benefit by using accurate equipment. Im' lucky enough to have such a setup.

Granted, 0.25 dB is not much, but when spread out over an ocatve, it is easily heard.

Jocko
  Reply With Quote
Old 11th April 2003, 10:55 PM   #23
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Default RIAA AND NICE INVITES.

Hi,

Quote:
Come on up ... my end of Canada is closer to California thou.
Thank you so much and of course the same welcome to you whenever you might come to Europe.

Quote:
Granted, 0.25 dB is not much, but when spread out over an ocatve, it is easily heard.
Purrrcelisely, and that's exactly why RIAA accuracy matters IMO.

Cheers,
__________________
Frank
  Reply With Quote
Old 11th April 2003, 11:09 PM   #24
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
 
EC8010's Avatar
 
Join Date: Jan 2003
Location: Near London. UK
Default Shelf errors

Perzackly. RIAA errors produce shelf errors, and the audible effect of a shelf error is way out of proportion to the measured error. Perhaps it's a power thing? (Active crossovers are especially critical of level errors between drivers.) Worse, it's really hard getting RIAA errors down.
__________________
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote

Reply


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
Exact E12D/SPL Telstar Full Range 2 3rd April 2009 11:49 AM
exact dimensions of a BIB fe167e AudioGeek Full Range 15 21st January 2007 10:40 PM
Exact dimensions for BiB with 40-1354? Spasticteapot Full Range 1 24th November 2006 10:22 PM
Completed Exact Speakers BTW Full Range 22 30th April 2006 03:21 PM
search exact phrase jcx Forum Problems 2 13th September 2005 02:48 PM


New To Site? Need Help?

All times are GMT. The time now is 12:17 AM.


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