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  • #41
    Originally posted by 9radua1 View Post

    Yeah, REW has a bit of a learning curve, but it looks worse than it is 😅 It is not so much the software that is hard to learn, but rather, as you say, how to physically set things up correctly and then how to interpret the results. Measuring in-room will include all reflections and the total sound field, so for a near-field speaker response, you will need to make an "IR window" in REW after making your measurements, so REW discards anything beyond a certain time point and thereby discards the room reflections.

    If measuring the in-room response at the listening position, then you don't need to do the above, of course. Instead you need to time-align and average a minimum of 5 to 9 measurements around the listening position to get a clear picture of what is going on (mainly in the bass and lower mid).

    The Audiophile subreddit has a good walk-through of measuring the room (even if you don't need the room correction part).
    Thanks for the link!

    Roon‘s User forum has an extensive thread regarding the use of REW

    https://community.roonlabs.com/t/a-g...-in-roon/23800

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    • #42
      Just come for the rescues the ATC SCM 19s, although the newer versions:

      https://www.whathifi.com/atc/scm19/review

      http://v2.stereotimes.com/post/atc-m...19-loudspeaker

      https://www.stereophile.com/content/...n-loudspeakers

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      • #43
        he guys

        here is an ATC test of the SCM25. its from polland, so i used google to translate a bit

        https://translate.google.de/translat...vvIuh9WyT8kzHU

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        • #44
          Originally posted by SolarMusic View Post
          he guys

          here is an ATC test of the SCM25. its from polland, so i used google to translate a bit

          https://translate.google.de/translat...vvIuh9WyT8kzHU
          This review from Poland is marvelous, comprehensive, in depth, describing the experience in personal and technical terms. It looks like ATC have created a stronghold in Poland...

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          • #45
            There's an interesting (quite long at 26 minute) engineering-oriented video review linked here of three loudspeakers - the Epos ES12; the B&W 602S2 and the ATC SCM19 mk2. It's from GR-Research - a loudspeaker kit supplier.

            The loudspeaker reviewer answers the question at the start "do you ever find one you like?" and says "yes, I do often find some real gems out there and today might be one of those days" .

            You have to wait until the third loudspeaker - the SCM19 (from 18:00) - to understand which he means. He is quite scathing about the engineering quality of the Epos and the B&W but quite impressed with the ATC drivers and crossovers. Although he is still critical, his criticism of the SCM19 is much more limited than his criticism of the others. He concludes (24:00) that although he believes he could improve the SCM19, as it comes it is "by far ... the best that I have seen".
            Last edited by jophill; 12-17-2020, 11:08 AM.

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            • #46
              Nice classic review
              http://studio-hifi.com/images/SCM50REVIEW2.pdf

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              • #47
                Originally posted by jophill View Post
                There's an interesting (quite long at 26 minute) engineering-oriented video review linked here of three loudspeakers - the Epos ES12; the B&W 602S2 and the ATC SCM19 mk2. It's from GR-Research - a loudspeaker kit supplier.

                The loudspeaker reviewer answers the question at the start "do you ever find one you like?" and says "yes, I do often find some real gems out there and today might be one of those days" .

                You have to wait until the third loudspeaker - the SCM19 (from 18:00) - to understand which he means. He is quite scathing about the engineering quality of the Epos and the B&W but quite impressed with the ATC drivers and crossovers. Although he is still critical, his criticism of the SCM19 is much more limited than his criticism of the others. He concludes (24:00) that although he believes he could improve the SCM19, as it comes it is "by far ... the best that I have seen".
                Nice review, indeed!

                I was surprised to see that the cabinet seems to be quite light and thin-walled(?). So the massive weight of the SCM19 (20 kg) must come from the woofer and nothing else!

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                • #48
                  Re the SCM19 mk2
                  Originally posted by SailorZH View Post

                  Nice review, indeed!

                  I was surprised to see that the cabinet seems to be quite light and thin-walled(?). So the massive weight of the SCM19 (20 kg) must come from the woofer and nothing else!
                  Yes, I was slightly surprised at the sound of the "knock". But the spectral decay graph is very clean (at 23:19) and much cleaner than the others. It does not reveal any significant resonances, whether from the cabinet or elsewhere. So it actually looks like the cabinet is doing nothing wrong - and that's what I think you ultimately need.

                  And the drivers do indeed have very large motor assemblies. I handled some ATC drivers at a show a couple of years ago and they were much heavier than I expected, from both the solid frame and the large magnet.

                  Good engineering all round.

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                  • #49
                    Originally posted by jophill View Post
                    Re the SCM19 mk2Yes, I was slightly surprised at the sound of the "knock". But the spectral decay graph is very clean (at 23:19) and much cleaner than the others. It does not reveal any significant resonances, whether from the cabinet or elsewhere. So it actually looks like the cabinet is doing nothing wrong - and that's what I think you ultimately need.

                    And the drivers do indeed have very large motor assemblies. I handled some ATC drivers at a show a couple of years ago and they were much heavier than I expected, from both the solid frame and the large magnet.

                    Good engineering all round.
                    All the more am I thinking of updating my SCM 19s v1 to the current version!!!

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                    • #50
                      I found this incisive review of ATC SCM40 speakers by a user(who on and off reviews for HiFi News). Having read that review and having heard the ATC SCM40 he kind of speaks for me as well....

                      https://community.naimaudio.com/t/sb...-scm40/2149/57

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                      • #51
                        There's a review of the passive SCM50SL that I think hasn't yet been posted, from Audio Fanzine (France) or translated here into English.

                        I particularly like the subtitle «Si le prix avait été humain, on aurait atteint la perfection» ("If the price had been human, we would have achieved perfection"). And I learned a new French exclamation "Et bien punaise!" although having never heard it before in another context I'm not sure how polite it is.

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                        • #52
                          Here is someting about the SCM50 on Youtube
                          https://m.youtube.com/watch?fbclid=I...ature=youtu.be

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                          • #53
                            For those who would like to see an online review of the classic passive 50s and P2 power amp check out Terry’s review on his YouTube channel, Pursuit Perfect Systems

                            https://youtu.be/wryW7OPJ9bI

                            There should be a follow up review when the pair become actives.

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                            • #54
                              first youtuber had the exact same opinions as the second, has to be a good speaker ;-)

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                              • #55
                                Unfortunately in German, but Google Translate might help: the ATC SCM50ASLT has won the fairaudio's favourite Award

                                https://www.fairaudio.de/ausgewaehlt/

                                And also LowBeats (German agin!) has a very strong review of the ATC SCM50ASL and discusses the point of what is better: active or passive.

                                https://www.lowbeats.de/test-atc-scm...er-als-passiv/

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                                • #56
                                  Originally posted by SailorZH View Post
                                  ... And also LowBeats (German agin!) has a very strong review of the ATC SCM50ASL and discusses the point of what is better: active or passive.

                                  https://www.lowbeats.de/test-atc-scm...er-als-passiv/
                                  I noticed a really interesting snippet in the article from an engineering point of view. Sorry to the non-engineers here who may wish to look away now.

                                  The XLR input on the active SCM50 is hand trimmed for best rejection of any interference on the loudspeaker lead. They get a broadband CMRR (common mode rejection ratio) of 70 dB. That's impressive. Looking at online photos of the amplifier packs I now recognize the trimmer potentiometer and the trimmer capacitor to do this, close to where the XLR input connects to the board.

                                  I use 10 dB Rothwell attenuators between CDA2 Mk2 and SCM50ASL to push the volume control just a touch higher. It was correctly pointed out to me in another place that the way they do the attenuation reduces CMRR a little. I was wondering whether to modify the attenuators to see if that mattered. But such fabulous attention to engineering detail from ATC convinces me I don't need to try.

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                                  • #57
                                    Raving review of the ATC SCM 19 at LowBeats. Unfortunately in German, but let your favorite translator software work on it, it‘s a treat!

                                    https://www.lowbeats.de/test-atc-scm...er-3-000-euro/

                                    Comment


                                    • #58
                                      Not sure if this Alpha Audio audition test that includes the SCM100asl has been mentioned before(?)
                                      https://alpha-audio.net/2020/10/live...udio-monitors/

                                      Compares the SCM100's to two other active systems that include DSP - Grimm LS1be and Dutch&Dutch 8C.
                                      It was originally a livestream, but this is the recording of the session and you can click through as you wish. Note, they turn off the audio during setup of each of the speakers, so if you hear nothing when you click through, thats the reason. The ATC session starts around 57 minutes in.

                                      The ATC'S are set up very differently to how I have mine - much closer to the rear room boundary, toed in to cross in front of the listening position.
                                      The audition room is a studio live performance space - the DSP equiped speakers may have an advantage in optimising for this room (or not - they like all the speakers).
                                      Still very interesting to hear the comments.

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