Removing Hiss - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 28th September 2008, 05:11 PM   #1
Ted205 is offline Ted205  United Kingdom
diyAudio Member
 
Ted205's Avatar
 
Join Date: Jun 2008
Default Removing Hiss

I'm looking for a method to remove abit of audio hiss. if i were to use a low pass filter what would be a suitable cut off frequency ?

I know this is abit of an application specific question but are there any rules of thumb to get me started.
  Reply With Quote
Old 28th September 2008, 05:33 PM   #2
enzoR is offline enzoR  Netherlands
diyAudio Member
 
Join Date: Mar 2008
hiss, as in noise? if you can hear hiss, you dont want to filter it out as this would be in the audio frequency band. Your options are down to reducing the noise for example by lowering the gain, and using lower value (less noisy) resistors in the audio and feedback path.
  Reply With Quote
Old 28th September 2008, 05:51 PM   #3
Banned
 
Join Date: Jan 2008
Blog Entries: 2
Enzo is right.

If you can't get rid of the hiss by changing the balance of any volume controls in your system, you have little option but to modify or replace part of the system, probably the power amp or preamp if it is separate.

An average MP3 or CD player should have virtually imperceptible noise.

w
  Reply With Quote
Old 29th September 2008, 10:11 AM   #4
Ted205 is offline Ted205  United Kingdom
diyAudio Member
 
Ted205's Avatar
 
Join Date: Jun 2008
Thats a very good point

However what is the realistic range of music, I'm sure it doesn't range from 20Hz to 20KHz

Also is there any benifit in removing any higher frequencies (say above 20kHz) so as to remove them (almost) from being amplifiered in the later stages.
  Reply With Quote
Old 29th September 2008, 10:58 AM   #5
diyAudio Member
 
Join Date: Mar 2005
Location: Portugal
Quote:
Originally posted by Ted205


Also is there any benifit in removing any higher frequencies (say above 20kHz) so as to remove them (almost) from being amplifiered in the later stages.
In a way yes,you could size the RF filter in the input by ear.But so that it doesn't cut too much the high frequency.

Some listeners like the super tweeters,so it's up to your hearing if you want to amplifie the higher frequencies.
__________________
xxx I should correct my spelling xxx
  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
Hiss but no hum... RockysDad Tubes / Valves 13 5th April 2009 05:35 PM
Hiss in my P3a Amp blap0220 Solid State 15 1st June 2007 01:52 AM
Pre-amp hiss on 1 channel bulgin Solid State 1 5th August 2006 01:04 PM
Can jitter cause hiss ? percy Digital Source 2 21st April 2006 04:27 PM
hiss jaudio Chip Amps 21 6th March 2005 05:02 PM


New To Site? Need Help?

All times are GMT. The time now is 06:42 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