Audiolab 8200 CD left channel treble distortion - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, 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
Reply
 
Thread Tools Search this Thread
Old 12th June 2014, 03:26 PM   #1
diyAudio Member
 
Join Date: Apr 2014
Default Audiolab 8200 CD left channel treble distortion

Hi all,

For the last two days I've been getting a very noticeable metallic (tinny) sounding distortion in the left channel whenever there's a significant element of high frequency in the music like high lying violins. At first I thought the tweeter of my speaker was failing but switching over to my headphone rig where the only element in common with my speaker rig is the CD player, I get the same phenomenon coming through my headphone left channel.

Any ideas about what this might be? Any ideas about what to do about it?

Thanks in advance. (you guys have always been great about this stuff in the past!)
  Reply With Quote
Old 12th June 2014, 05:04 PM   #2
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
That's a very strange problem.

First steps would be to try and identify what is going on by using a scope and a CD that displays the problem. Does any oscillation show ? Next up and it might be an idea to play a test CD (you can make one with Audacity) of a frequency sweep from 20 to 20kHz at 0db level and again see what shows on the scope distortion wise.
__________________
-------------------------------------------------------
Installing and using LTspice. From beginner to advanced.
  Reply With Quote
Old 12th June 2014, 11:04 PM   #3
diyAudio Member
 
Join Date: Apr 2014
The diagnostic testing you advise is beyond my scope (no pun intended). But thanks anyway for the suggestion.
  Reply With Quote
Old 13th June 2014, 07:53 AM   #4
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
You do really need the test gear for work like this.

Without, and you need a circuit (or an ability to recognise and visualise the circuit from the board) and to then isolate and "swap" left and right as you work back from the sockets to see where the problem is.

Another idea is to probe the opamp outputs working back,and use AC coupled headphones and a series resistor to see if you can determine where the problem develops. You need to be careful doing that as connecting the 'phones to any point that has DC voltage will cause a loud crack or pop in the 'phones. So connect first and then listen
__________________
-------------------------------------------------------
Installing and using LTspice. From beginner to advanced.
  Reply With Quote
Old 15th June 2014, 12:46 PM   #5
diyAudio Member
 
Join Date: Apr 2014
I've pretty much come to the conclusion that the problem is not with my Audiolab CD player but with my left ear. Probably an earwax buildup. The treble distortion has been gone for the last couple of days anyway. This is a big relief because dealing with my ear is a whole lot easier and cheaper than with my CD player.
  Reply With Quote
Old 15th June 2014, 01:19 PM   #6
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Thanks for the update... hmm... yeah, maybe try some drops for a few days.
__________________
-------------------------------------------------------
Installing and using LTspice. From beginner to advanced.
  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
marantz pm 7200 left channel distortion chris212 Solid State 11 28th March 2013 04:15 PM
Cyrus2 amp Left channel distortion cslaw Solid State 14 7th March 2011 07:35 AM
strange distortion on one channel of cd player Luke Digital Source 13 18th December 2008 05:43 PM
CD players that have syncronized left and right channel soongsc Digital Source 13 4th March 2007 09:04 AM
left channel distortion mic_ael Chip Amps 6 17th February 2006 12:13 AM


New To Site? Need Help?

All times are GMT. The time now is 04:16 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