Ringing in Philips 9710 - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 5th June 2011, 09:00 AM   #1
diyAudio Member
Join Date: Oct 2009
Default Ringing in Philips 9710


I am using Philips 9710 in an tqwt enclosure.
I have noticed that one driver produces sometimes a high pitch ringing.
This happens usually when playing sopranos (in loud passges) or some guitar notes.
This does not happen when played quietly. Still annoying when you want to turn up the volume a bit to get more like life like performance.

It is still there when I take the driver out of the enclosure.

Is the spreaker fried? I guess there is nothing I can do?

Any hints will be appreciated.

  Reply With Quote
Old 5th June 2011, 09:40 AM   #2
Zen Mod is online now Zen Mod  Serbia
diyAudio Member
Zen Mod's Avatar
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
if Rdc is comparable with other driver - VC is probably fine , and then all you need is to realign it .

find good speaker repair shop , for them it's piece of cake

in any case - only after complete disassembling is possible to be sure
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM

Last edited by Zen Mod; 5th June 2011 at 09:42 AM.
  Reply With Quote
Old 5th June 2011, 10:52 AM   #3
diyAudio Member
Join Date: Oct 2009

Yes, Rdc seems to be ok.
Thanks for the advice.

  Reply With Quote
Old 7th June 2011, 01:50 PM   #4
diyAudio Member
Join Date: Oct 2009
I googled around to find a good workshop in the UK (preferably London).
I can't find anything.
Any clues, good/bad experience?
  Reply With Quote
Old 8th June 2011, 02:49 PM   #5
DrBoar is offline DrBoar  Sweden
diyAudio Member
DrBoar's Avatar
Join Date: Apr 2003
Location: Stockholm
Try first to figure out what the reason is.
If you swap positions for left and right speaker. Does the ringing follow the driver?
No= room accoustics
Yes= try swapping amplifer chanels without moving speakers. Does the ringing change with swapping?
No= Driver problem
Yes= amp problem

If driver problem is it coil or cone.
Try putting a doughnut of cotton or some other BAF or soft foam betwwen the inner cone and the main cone. Production tolerances can cause several resonances to coincide in one driver but not others, if you are out of luck.

Scraping voicecoil can be detetected by playing something like the 0-200 Hz test tone ( download from the net) and playing at a low volume with the driver out of the box. Out of the box the ideal driver would not make any noise at all just vibrate wih very little extra sounds being emitted.

Realigning a cone with paper suspension without reconing it?
I would look out for 9710 in flea markets and Ebay. I got a pair on a flea market for about 20 euros, in Voigt pipes facing forward and sounding quite terrible. The driver is made for facing upwards not towards the listerner
  Reply With Quote
Old 10th June 2011, 09:11 PM   #6
diyAudio Member
Join Date: Oct 2009

I tried the speakers with a different amp.
The problem is still there. Also when I took out the drivers from the enclosure.
Still have to try teh damping between the cone and the whizzer as you suggested.
  Reply With Quote
Old 14th June 2011, 09:56 PM   #7
diyAudio Member
Join Date: Oct 2009

I have tested the driver with the tone generator. It resonates at 1370-1420Hz.
Is this the voice coil then?
  Reply With Quote


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
FS: 14 x Philips Speaker: 1265/W8 + 1265/M8 + 9710/M8 jdkwant Swap Meet 1 6th March 2014 01:24 AM
Cabinet Plans for 9710 and Bombardon Vathek Multi-Way 17 31st December 2013 05:11 AM
Question about bass driver in combination with Philips 9710? bezobraznia Multi-Way 3 13th December 2008 08:15 AM
Fostex FE206E or Philips AD 9710 M8 69122s Full Range 14 6th December 2007 10:29 AM
Acoustic ringing? grataku Solid State 1 15th March 2001 05:55 AM

New To Site? Need Help?

All times are GMT. The time now is 09:35 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2