Sibilance Distortion on SMGs - diyAudio
Go Back   Home > Forums > Loudspeakers > Planars & Exotics

Planars & Exotics ESL's, planars, and alternative technologies

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 18th May 2007, 08:57 PM   #1
diyAudio Member
 
Join Date: Mar 2006
Location: Michigan
Default Sibilance Distortion on SMGs

hello everybody,

The Maggie rebuild is going along, however in preliminaty listening I keep getting Sibilance distortion out of both channels at high volumes. What could be causing this???

Thank you

-Moose
  Reply With Quote
Old 19th May 2007, 01:39 PM   #2
bigwill is offline bigwill  United Kingdom
diyAudio Member
 
Join Date: Dec 2004
Location: UK
Might be the amp.
  Reply With Quote
Old 19th May 2007, 02:30 PM   #3
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
Suspect everything.

Not sure what ur rebuild is about, but if you redid a section that does HF, check the impedance curve vs. the old stock impedance curve!

Better still do an FFT of the response. Look for a clear resonance.

Someone I know had a pair of maggies with the ribbon tweeters, and when we changed the speaker cables to another brand (BEAR Labs) most if not all of the sibilance issues he had went away. Why that should be, dunno. But it did.

We were not hypnotized, delusional or easily led. Not subtle.

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 19th May 2007, 04:29 PM   #4
diyAudio Member
 
Join Date: Mar 2006
Location: Michigan
I rebuilt the tweeters a couple of months ago, (semister Break) now that the Year is done, a friend and I are tackling the Mid-Bass Wires.

After posting this, I looked up the many causes of Sibilance distortion. oh lord! so many causes I think I am going to change from my HK3480 to A Citation 19 in a day or so, which should give a real demonstration of what these speakers can do. so I will check these things off one by one.

Right now, Listening to Billy Joel's 52nd street on Original Vinyl, The Sibilants have extreemly little distortion (if any at all). I am starting to think that maybe it is the gratuitous DSP in CDs, and on Ipods and Such. I hate to Bash CDs, but its looking like that aggravates the problem.
  Reply With Quote
Old 20th May 2007, 03:58 PM   #5
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
Your CD chain can certainly make nasty things happen in the highs.

Wondering what you used for the foil for the tweeters?
If it was not the right alloy and thinness, you may have a resonance "in band"...

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 21st May 2007, 09:21 PM   #6
diyAudio Member
 
Join Date: Mar 2006
Location: Michigan
the tweeters are not Ribbon, they are Aluminum wire.

I think the distortion is caused by a reaction between the CDs I own and the tweeter. It varies from CD to CD, and some are clearly worse than others.
  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
Magneplanar SMGs repair/ rebuild alexmoose Planars & Exotics 32 23rd July 2008 03:05 PM
Turntable High Frequency Distortion Sibilance Signal Analogue Source 1 8th January 2008 06:09 PM
Reparing Magnepan SMGs tweeter stolbovoy Planars & Exotics 4 23rd December 2007 02:13 AM
Success with the SMGs alexmoose Planars & Exotics 5 14th January 2007 12:52 AM
Sibilance opus007 Multi-Way 19 12th February 2005 06:23 AM


New To Site? Need Help?

All times are GMT. The time now is 02:12 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