There is no ATC SCM150ASL Pro review or frequency response curve.

[Puddingbuks]

By contrast, D&D measure pretty well, I've never heard them sound anything but awful.

Absolute bs.

 

[YSDR]

How many times do we read things like clearest midrange, or sweetest highs. Sigh.

Until another manufacturer does it better?

 

[pierre]

Clearest mid-range in the business, low distortion (that's 80% of the music). Major studios actually listen before buying what else do you need?

I have not seen new ones in a studio for a very long time. I do like the 50 with a sub.

Clearest would need proof, aka measurements. Purify and others have improved the last 20 years.

On one side, I also do like the directivity : vertically controlled is good in a studio.

On the other side, they can not compete with new monitors and the stream of excellent new speakers (KEF and friends).

For high output, that’s a different story and I do not know what is good at 5m and possibly the ATC shines there. I never see them in post prod studio for ex, but small samples does not mean much.

Ymmw

 

[MAB]

low distortion (that's 80% of the music)

Can you explain what you mean by this? Are you implying that distortion is the most important thing in a speaker, with all other audible aspects like frequency response being the remaining 20% by rank of importance?

The ATC midrange dome is nice. It's been tested by itself, including off-axis and distortion, and has good properties. So do many other drivers. A driver doesn't make a speaker.

Many of us are confused by the crossing over of the dome to a 15" woofer. There are some physics, directivity being a major issue. especially crossed over to a 15" woofer. For instance:

ATC-SM75-150

My attempts to cross over a similar sized midrange to a 15" woofer was entirely unsuccessful, and not because of distortion.

Hence the question, how come there is no reasonably complete set of measurements for an expensive speaker that has so much anecdote?

Major studios actually listen before buying what else do you need?

By far the largest variable in my system is the variability in the product that studios make, including within the same release. I definitely need way more that anecdotes and a few measurements of the nice midrange driver. Good measurements tell us about the speaker and how it will sound in various implementations, how it will interact with various rooms, and how amenable it will be to be EQ'ed to a target.

 

[YSDR]

My attempts to cross over a similar sized midrange to a 15" woofer was entirely unsuccessful, and not because of distortion.

A typical 3" dome can't crossed as low as the ATC SM75-150. If you can cross low where the 15" won't start to beam and won't resonate or distorts, then it can work. This is how ATC did and still does.

 

[MAB]

A typical 3" dome can't crossed as low as the ATC SM75-150. If you can cross low where the 15" won't start to beam and won't resonate or distorts, then it can work. This is how ATC did and still does.

Exactly.
I would just like to see a full set of measurements, see how it works out. My own selfish interests. I've appreciated the various measurements of the midrange.
I would think if I were a potential customer, I would feel strongly about measurements given that so many other competitors do now. Cost isn't even prohibitive these days.

 

[Theta]

How many times do we read things like clearest midrange, or sweetest highs. Sigh.

I have never used the phrase sweet highs.

 

[Theta]

Can you explain what you mean by this? Are you implying that distortion is the most important thing in a speaker, with all other audible aspects like frequency response being the remaining 20% by rank of importance?

The ATC midrange dome is nice. It's been tested by itself, including off-axis and distortion, and has good properties. So do many other drivers. A driver doesn't make a speaker.

Many of us are confused by the crossing over of the dome to a 15" woofer. There are some physics, directivity being a major issue. especially crossed over to a 15" woofer. For instance:

ATC-SM75-150

My attempts to cross over a similar sized midrange to a 15" woofer was entirely unsuccessful, and not because of distortion.

Hence the question, how come there is no reasonably complete set of measurements for an expensive speaker that has so much anecdote?

By far the largest variable in my system is the variability in the product that studios make, including within the same release. I definitely need way more that anecdotes and a few measurements of the nice midrange driver. Good measurements tell us about the speaker and how it will sound in various implementations, how it will interact with various rooms, and how amenable it will be to be EQ'ed to a target.

Yes, I am implying that the lack of distortion in the mid-range is what is most important.
Are you implying that a company with the experience, longevity and reputation of ATC don't do measurements?
Concerning the low crossover point to the 15 inch drivers Altec and Tannoy have been doing it for a long time.
I hope that everyone making comments on this post have actually auditioned the ATC line.
If I were to buy speakers strictly by measurements, I would have had to buy some kef blades or whatever. Nice life style hifi, but hardly high end audiophile gear.
.

 

[goat76]

Yes, I am implying that the lack of distortion in the mid-range is what is most important.

I would say the lack of distortion in the midrange is THE single most important thing when it comes to studio work. That is the most critical frequency area to get right in a music mix and the range where our hearing is the most sensitive to distortion.

 

[MAB]

Yes, I am implying that the lack of distortion in the mid-range is what is most important.
Are you implying that a company with the experience, longevity and reputation of ATC don't do measurements?
Concerning the low crossover point to the 15 inch drivers Altec and Tannoy have been doing it for a long time.
I hope that everyone making comments on this post have actually auditioned the ATC line.
If I were to buy speakers strictly by measurements, I would have had to buy some kef blades or whatever. Nice life style hifi, but hardly high end audiophile gear.
.

I just selfishly want to see them.
I felt the same way about JBL M2, for instance.
And the measurements helped me understand what made them work.
And, ATC gets a lot of flack for undersupplying measurements, seems it would clear things up, which is the point of this thread I think...

 

[goat76]

Perhaps studios get data, or choose in other ways. Whatever their arrangements they’ve been around for a while and there’s no reason to suppose the 100 or 150 is significantly different to the 50 except in bass extension and total output, surely?

Martin Colloms measured the SCM50 in Hifi Critic, reprinted here…https://atc.audio/wp-content/uploads/2018/01/Hi-Fi_Critic_SCM50PSL_WEB.pdf His later review of the Actives references the earlier test and highlights the differences…

https://atc.audio/wp-content/uploads/2019/10/ATC_SCM50ASL_Review_Hi-Fi_Critic_Sept_19.pdf

The frequency response looks great (+/- 2 dB) for the SCM50, nice and even on and off axis. I'm sure the larger models will measure similarly but with higher SPL capability.

 

[goat76]

Smaller ATC speakers measures pretty good too.

Here are the measurements I did for my ATC SCM11:

 

[Ktacos]

Only studios I've seen atc in are pictures online of studios that have probably closed by now. Honestly a poor metric anymore as most stuff is being made in home studios.

The frequency response looks great (+/- 2 dB) for the SCM50, nice and even on and off axis. I'm sure the larger models will measure similarly but with higher SPL capability.

View attachment 409332

Looks incredibly average. The tweeter looks rough, thought it was their best tweeter yet?

Here's a little two way I made with like $80 in drivers and DSP. Done in room, I like my highs tilted down a bit. Better dispersion and diffraction than ATC. Why can't they do this too? I'll stop sharing this graph here when companys stop making poopy speakers.

 

[richard12511]

Their US distributor stated that he at least will never send a model for measurement.
Keith

Did he give a reason for that?

 

[richard12511]

Smaller ATC speakers measures pretty good too.

Here are the measurements I did for my ATC SCM11:
View attachment 409333

View attachment 409334

One of my parent's neighbors sold his Neumann KH420 - which measures superbly - to buy the ATC SCM 110, which I think is similar to the 150 in terms of spl and extension. He's happy with the upgrade.

 

[Sokel]

Soffit-mounted 150's was the best bass of my life,ever.
At SPL no sane person should ever expose itself.
In a studio,but still...

One of the reasons I got in the hobby.

 

[richard12511]

Many of us are confused by the crossing over of the dome to a 15" woofer. There are some physics, directivity being a major issue. especially crossed over to a 15" woofer. For instance:

ATC-SM75-150

My attempts to cross over a similar sized midrange to a 15" woofer was entirely unsuccessful, and not because of distortion.

What about crossing the dome over to two 10" woofers like in the SCM 110? The person I mentioned up above who now owns the 110 also spent some good time listening to it side by side with the 150, and he came away preferring the 110. Might the directivity matching between the dome midrange and the 10" woofers be a contributing factor to his preference?

 

[richard12511]

By contrast, D&D measure pretty well, I've never heard them sound anything but awful.

First time I've ever heard anyone dislike those speakers. I've heard them twice now, and both times they've been amongst the best I've heard. Can't wait to see what they can do with a larger model.

 

[JustJones]

Twice as much as the KH420. To much $$ for me .

https://www.sweetwater.com/store/detail/SCM110ASLPro--atc-scm110asl-pro-dual-9-inch-powered-3-way-studio-monitor-pair

 

[MAB]

What about crossing the dome over to two 10" woofers like in the SCM 110? The person I mentioned up above who now owns the 110 also spent some good time listening to it side by side with the 150, and he came away preferring the 110. Might the directivity matching between the dome midrange and the 10" woofers be a contributing factor to his preference?

Very possible explanation.

Same for the larger vs. smaller Genelec, which I have more experience with. And you can see why in Genelec's published measurements, and in the selection of high quality third-party measurements.