Results 1 to 5 of 5

Thread: CDM7 losing heights with age

  1. #1

    CDM7 losing heights with age


    I have a 20 year old pair of CDM7 which I used intensively in the first 10 years, then sporadically in the following 5, and almost not in the past 5 years.

    Recently I decided to use them again, and I was hugely disappointed to find out that they are missing a lot of the high range frequencies. Low end is still fine bit high end seems muffled.

    Is there any known problem with them, like not ageing well? The tweeters or the crossover?

    Thanks for sharing your experience.

  2. #2
    [WBF Founding Member] Addicted to Best! JackD201's Avatar
    Join Date
    Apr 2010
    Manila, Philippines

    The first thing I would do is to clean their terminals as well as the jumpers if you use them. Some great tips from our own Tom Mallin her

    Do let us know what happens

    Disclosure of Industry Participation

    Co-Founder and Managing Director PureSound PH - Exclusive Distributor (Philippines only) of Lamm, Von Schweikert Audio, CH Precision, Light Harmonic, Valvet, Townshend, Critical Mass Systems, EERA, KR Audio, Ambience SS, TechDAS, Master Built, Stromtank

  3. #3
    Hi, thanks for your suggestion. I'll try that later today. Will keep you informed.

  4. #4
    VIP/Donor [VIP/Donor] microstrip's Avatar
    Join Date
    May 2010
    Try connecting the speaker cables just to the two upper terminals - if there is no sound there is a problem with the tweeters.

    Sometimes people loose the jumpers when they disconnect the speakers - are they in the proper place, well screwed?
    Under construction around the DCS Vivaldi 2.0 stack and a pair of Wilson XLF's : Forsell Air Force One, ARC Phono 2SE, cj GAT, LP275m's , TA OPUS MM2 IC's and sp, TA XL digital, TA XL gen V power cables and CenterStage footers ...

  5. #5

    so I cleaned the terminals and the jumpers, reconnected everything, well screwed everything. Sadly it made no difference.

    I also tried wiring only the tweeters as suggested, and they work.

    There is another possibility for the muffled sound, not sure though:
    The room the CDM7 stand in is only about 12m2 (around 130 square foot), and I believe it's just too much bass for such a small room, which makes the heights sound under-represented.
    Also it's quite impossible the place the speakers correctly which enough distance from the walls in such a small room.

    The issue still could result from capacitors in the crossover gone bad (old, dried out) though.

    I have a pair of DM600 S3 which I use for now, and they sound more balanced in that small room, of course much less powerful in the lower end.

    I'll keep on analysing. Maybe I'll move the CDM7 to a bigger room the weekend to check how they sound there.

    Thanks everyone for their suggestions.

Similar Threads

  1. Neil Finn's "Flying in the Face of Love" off his DIZZY HEIGHTS album
    By es347 in forum Best Online and You Tube Videos Forum
    Replies: 0
    Last Post: 02-02-2017, 03:32 PM
  2. Is Wilson losing their marketing edge?
    By caesar in forum Wilson Audio Speaker Forum
    Replies: 347
    Last Post: 01-31-2017, 11:28 AM
  3. Cleveland Losing And I Love It!!
    By Recordsguy in forum Sports Forum
    Replies: 5
    Last Post: 06-20-2016, 01:02 PM
  4. Losing Fans?
    By MylesBAstor in forum Pop/Rock/Blues/R&B Forum
    Replies: 10
    Last Post: 12-13-2013, 08:15 PM
  5. So much for losing their edge :)
    By MylesBAstor in forum Wilson Audio Speaker Forum
    Replies: 26
    Last Post: 11-22-2011, 02:01 PM


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts