Low dist at high frequencies - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 December 2004, 10:10 PM   #1
Pan is offline Pan  Sweden
diyAudio Member
 
Join Date: Sep 2002
Default Low dist at high frequencies

How low distortion are we able to get in the top octaves from a power amps these days?

Or like this;

What amps on the market has the lowest distortion at the top octaves?

Lots of amps have like 0.005% THD or so in the 100Hz-1k range but usually much higher numbers above that. Are there any real performers out there with less than 0.01% at 20k for example?

I believe Halcro and Dynamic Precision has ultra low dist, but how about those high frequncies..?

/Peter
  Reply With Quote
Old 11th December 2004, 10:40 PM   #2
diyAudio Member
 
darkfenriz's Avatar
 
Join Date: Jun 2004
Location: Warsaw
what is the purpose of measuring harmonic distortion of 20kHz as the harmonics (40kHz, 60kHz...) are far beyond human's ear hearing range. I guess neither dogs nor bats don't mind some distortion.
but seriously, this is a good question, but even ,say 4kHz harmonics may be hardly detectable
cheers
  Reply With Quote
Old 11th December 2004, 10:52 PM   #3
Pan is offline Pan  Sweden
diyAudio Member
 
Join Date: Sep 2002
The thing is that many amps begins to suffer from increased disotrtion at 1k or so, indicating problems with fast signals. IME the highs are among the parameters that has most difference sonically among amps.

Since new amps (power as well as ICs) with really low dist. in the mids has entered the market and often sound extremly good, I simply would like to find out if its worthwhile to have equally good behaviour in all of the audible range.

Typically FET amps have a rise in dist. at 1k.. this is true for class D amps as well. The most linear amps distortion vs. frequency sems to be BJT amps, they can have similar numbers up to 100k or so before the dist. rise significantly. However the amp I am thinking about do not have ultra low distortion like some other amps have in the low range (sub 1k).

/Peter
  Reply With Quote
Old 11th December 2004, 11:31 PM   #4
diyAudio Member
 
Join Date: Aug 2003
Location: Prague,Czech Republic
Best amps of these days have distortion 0.001 in all acoustic band and curve of distortion is very flat, rise practicaly only above 100 kHz . But to make it is not easy, because all constuction must be perfect in every details. By the way, price is adequate, look at Halcro or Dynamic Precision .
  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
DIY Dist Pedal: Is this schem correct? Earthscum Parts 10 21st April 2009 11:59 AM
help lost high frequencies on Energy C8 speakers jwmm7 Multi-Way 12 6th December 2007 07:33 PM
pabo's 0.0008% dist class D module peranders Class D 23 6th April 2006 11:14 AM
Speaker tweeter modification: L-pad & high frequencies raabje Multi-Way 12 20th July 2005 04:00 PM
dist on clean tone trip-wire Tubes / Valves 5 25th December 2002 12:49 AM


New To Site? Need Help?

All times are GMT. The time now is 08:01 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