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  • Timeline of the SCM 50

    Does anyone know if there is a timeline of the SCM50 with all their changes in units and amps over the time since their first appearance?
    And if there is none, isn't it a interesting task for us to use our swarm knowledge to make such a timeline?
    ​​​​​

  • #2
    I think these are the two most recent changes:

    Comment


    • #3
      Hi darrenyeats,
      Thanks a lot for the first dates of the SCM50!
      Do you know if there is a exact year for the amp pack change.
      Do you think that the change from non SL bass unit to the ASL might be not that important than the HT-unit change?
      Was there a change in the legendary mid-unit over the whole time?

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      • #4
        Hi Mariner, I don't have a more accurate date for the amp. Note some domestic models sold into Europe like FF anyway have the "anniversary" amps, not the Mk 4.

        The SL is worth having.

        Tweeter, depends where you start. If you have the previous unit (SEAS) and it has had a kind life, then the ferrofluid will not have dried and the difference will be smaller. If it's had hard use, then that's different. Sorry for being vague!

        For specific info, e.g. if you have serial numbers, contact ATC by phone or Facebook Messenger (I would avoid email).

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        • #5
          Hi both,

          Also have a look at the website here

          http://atcloudspeakers.co.uk/about-atc/timeline/

          I forget at times just how long the 50s have been around, 1985!

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          • #6
            Thanks a lot Alastair !!!!
            That´s exactly what i´m looking for !

            Comment


            • #7
              I have tried to extract the SCM50 dates from the ATC timeline
              and that is what i have found:

              1985 - Creation of the SCM50A because of an request from the danish radio for a compact high performance loudspeaker
              1992 - Upgrade to the MK11 ampack
              1996 - Upgrade to the SL ( super linear magnetic material) version. Now named SCM50ASL
              2005 - ATC launched a anniversary tower version SCM50ATSL
              2013 - Upgrade to the new ATC (SH25S) tweeter
              2016 - Lauching of a SE Version of the SCM50ASL

              What i asked myself... i think i have heard of a revision of the 3" soft dome mid unit during the timeline.
              Or am i wrong ?
              And i can´t find the date of the upgrade to the MK4 amp from which darrenyeats is writing!
              So maybe there is a further need of completing or improving the timeline!

              Comment


              • #8
                Originally posted by Mariner View Post
                I have tried to extract the SCM50 dates from the ATC timeline
                and that is what i have found:

                1985 - Creation of the SCM50A because of an request from the danish radio for a compact high performance loudspeaker
                1992 - Upgrade to the MK11 ampack
                1996 - Upgrade to the SL ( super linear magnetic material) version. Now named SCM50ASL
                2005 - ATC launched a anniversary tower version SCM50ATSL
                2013 - Upgrade to the new ATC (SH25S) tweeter
                2016 - Lauching of a SE Version of the SCM50ASL

                What i asked myself... i think i have heard of a revision of the 3" soft dome mid unit during the timeline.
                Or am i wrong ?
                And i can´t find the date of the upgrade to the MK4 amp from which darrenyeats is writing!
                So maybe there is a further need of completing or improving the timeline!
                Hi,

                I think it is a case of following up on Facebook or similar on the ATC group page. Ben has been there a bit and if the questions are short and simple, he should get back.

                I am not sure on the two questions, my active centre has a Mk 4 amp pack from 2013. When my 100s went for servicing they definitely coated the mid domes differently. The original ones (from the mid 90s) had more of a matte looking finish, newer ones today tend to look more shiny. As to the real technical differences over the last 35 years, that really is a direct question to ATC.

                Comment

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