Main Forums >> DIY, Electronics, Studio Design & Acoustics
        Print Thread

Pages: 1
Will_m



Joined: 02/04/09
Posts: 572
Loc: Manchester
Strange noise coming from Focal CMS Monitor
      #980540 - 05/04/12 11:50 PM
Hi guys, I recently purchased some focal cms65 monitors from a seller on the forums but I've been having some problems with one of them. When I first plugged them in one was making making a very odd distorted sound. As I had just made up the cables for them I suspected my less than excellent soldering to be at fault so I swapped the cable out and all was fine.

However now the noise had come back and I believe the cable is not to blame. The noise actually occurs even when the XLR cable is removed, although it us much quieter. Also when the noise is happening the speaker cone moves in and out quite rapidly. If I pull the XLR connector attached to the speaker input to one side the noise gets increasingly worse then makes a loud popping sound and stops for a while but eventually comes back.

The seller is refusing to take any responsibility so I'm kind of stuck, there is no way I can send them anywhere without it costing the earth as they are made of metal and extremely heavy. Dies anyone know what this issue could be?

I've uploaded a recording of the noise that speakers make to soundcloud:

http://soundcloud.com/willsium/speaker-noise

--------------------
http://www.williammorrismusic.com


Post Extras: Print Post   Remind Me!   Notify Moderator     Back to top
Hugh RobjohnsAdministrator
SOS Technical Editor


Joined: 25/07/03
Posts: 20825
Loc: Worcestershire
Re: Strange noise coming from Focal CMS Monitor new [Re: Will_m]
      #980596 - 06/04/12 10:55 AM
It's the kind of noise I'd associate either with dry-joints (bad solder connections on the PCBs), or a defective capacitor in the signal path. The fact that you can affect whether this sound appears or not by leaning on the XLR connector would suggest a dry joint problem somewhere near the socket or on any PCB connected to it.

I'd expect a competent electronics technician to be able to track this problem down fairly easily.

Hugh

--------------------
Technical Editor, Sound On Sound


Post Extras: Print Post   Remind Me!   Notify Moderator     Back to top
Will_m



Joined: 02/04/09
Posts: 572
Loc: Manchester
Re: Strange noise coming from Focal CMS Monitor new [Re: Will_m]
      #980720 - 06/04/12 11:21 PM
Cheers hugh, this seems logical and makes sense, the problem seems to be getting worse so its time to call in the pros I think. Anyone recommend a decent repair service in the manchester area?

--------------------
http://www.williammorrismusic.com


Post Extras: Print Post   Remind Me!   Notify Moderator     Back to top
ef37a



Joined: 29/05/06
Posts: 6383
Loc: northampton uk
Re: Strange noise coming from Focal CMS Monitor new [Re: Will_m]
      #980734 - 07/04/12 04:54 AM
Quote Will_m:

Cheers hugh, this seems logical and makes sense, the problem seems to be getting worse so its time to call in the pros I think. Anyone recommend a decent repair service in the manchester area?




Professional Music Technology - Salford

Address:
Unit 5, The Red Rose Centre
Regent Road
Salford
Manchester
M5 3GR

Tel: 0161 8776262
Fax:
Email: manchester@pmtonline.co.uk

Website: http://www.pmtonline.co.uk/pmtonline/?

Brands Offered - Click on a brand to be taken to the dealers website


◦Focal
◦JamHub
Dave.


Post Extras: Print Post   Remind Me!   Notify Moderator     Back to top
Pages: 1

Rate this thread

Jump to

Extra Information
0 registered and 9 anonymous users are browsing this forum.

Moderator:  David Etheridge, James Perrett, zenguitar, Martin Walker, Forum Admin, Hugh Robjohns, Zukan, Frank Eleveld, Will Betts,  
Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled
Rating:
Thread views: 2197

May 2014
On sale now at main newsagents and bookstores (or buy direct from the
SOS Web Shop)
SOS current Print Magazine: click here for FULL Contents list
Click image for May 2014
DAW Tips from SOS

 

Home | Search | News | Current Issue | Tablet Mag | Articles | Forum | Subscribe | Shop | Readers Ads

Advertise | Information | Digital Editions | Privacy Policy | Support | Login Help

 

Email: Contact SOS

Telephone: +44 (0)1954 789888

Fax: +44 (0)1954 789895

Registered Office: Media House, Trafalgar Way, Bar Hill, Cambridge, CB23 8SQ, United Kingdom.

Sound On Sound Ltd is registered in England and Wales.

Company number: 3015516 VAT number: GB 638 5307 26

         

All contents copyright © SOS Publications Group and/or its licensors, 1985-2014. All rights reserved.
The contents of this article are subject to worldwide copyright protection and reproduction in whole or part, whether mechanical or electronic, is expressly forbidden without the prior written consent of the Publishers. Great care has been taken to ensure accuracy in the preparation of this article but neither Sound On Sound Limited nor the publishers can be held responsible for its contents. The views expressed are those of the contributors and not necessarily those of the publishers.

Web site designed & maintained by PB Associates | SOS | Relative Media