Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.

What reviewers think

Magazine reviewers and YouTubers have tried this product—so we've summarized their strongest opinions below.

Product Strengths

  • ATC designs and builds every drive unit in-house, including voice coils, crossovers, and active amplification, allowing for complete control over every loudspeaker design decision
  • In the active version, a more clearly defined soundstage has clearer, more well-defined individual elements, where everything pops out more from the background
  • The active version has more energy, drive, and a more vivid overall presentation, resulting in a more tactile, energetic, and higher resolution sound
  • The SCM50's woofer has an enviable ability to resolve textures and timbral colors, capably rendering the skins of bass drums, the flutter of tom-toms, or the dark voicing of orchestral bass viols as bows are dragged across their strings
  • The SCM50 has an almost eerie immediacy that seems to glean the intent of the musician before their bow touches the string or a note escapes their lips, making piano reproduction breathtaking
  • Connectivity is limited to a single XLR input, which may require adapters for single-ended sources

Product Considerations

  • The active version is heavier than the passive version
  • The owner must manually turn each speaker on and off, as there is no trigger or auto startup circuit
  • The active version may pose challenges for owners of subwoofers needing high-level wiring connections, although workarounds exist
  • Careful attention must be paid to positioning a pair of SCM50s, as the full-bandwidth—ported design means that placing them too close to a boundary wall will result in bass bloom

Comparisons (according to reviewers)

  • SCM50 wins hands down over PureAudioProject Duet 15s for resolution, clarity, and dynamic shading
  • The active version excels over the passive in solidity of soundstage, neutrality, and ultimate detail retrieval

Takeaway: The ATC SCM50 offers exceptional sound quality, whether in its active or passive configuration, thanks to ATC's engineering and in-house design. The ATC SCM50 is a choice that will bring musical joy for years to come.

How useful are hifi reviews? We consider them useful for three things: (1) Surfacing new products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've ever heard (this means they probably are legitimately great). (3) Identifying a product's unique attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we  discount what reviewers say because they heap praise on everything—rarely being negative for fear of souring relationships with manufacturers. Further, they seldom have more than a couple products on-hand at once, relying on their imperfect memories to compare to past products.

Compared to their other products

We think it's helpful to understand how this product fits into the brand's full lineup (below). To learn more about these products, visit the brand's page.

SCM7 MK3

  • Positioning: The entry-level model in ATC's loudspeaker lineup.
  • Description: Features a compact design and precise sound, with a 25mm soft dome tweeter and a 125mm mid-bass driver. Compared to the SCM19, it offers a smaller footprint, making it ideal for small rooms or desktop setups, but it lacks the larger bass driver and higher sensitivity found in the SCM19.

SCM19

  • Positioning: A mid-range model in the Entry Series, offering a balance between performance and size.
  • Description: Features an "SL" spec bass driver and 75mm integral soft dome, providing excellent phase coherence and bass response. It offers a more robust soundstage than the SCM7 MK3.

SCM19A

  • Positioning: An active version of the SCM19, positioned as a higher-end option within the Entry Series.
  • Description: Includes an on-board 182-watt Class A/B bi-amplifier, delivering enhanced sound clarity and power. It uses active crossover filters, unlike the passive SCM19, which requires external amplification.

SCM40A

  • Positioning: The groundbreaking flagship model of the Entry Series, offering the most advanced features and performance.
  • Description: Equipped with a tri-amplifier system and a 164mm bass driver, providing exceptional sound quality and dynamic range. It surpasses the SCM19A with its additional mid-range driver and higher power output.
See all the brand's products

Read the reviews

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An excellent review of a great product
/
Publisher
/
3/1/2022
An excellent review of a great product
Publisher
/
3/1/2022

Manufacturer's notes

The SCM50 ASL (active) and SCM50 SL (passive) are designed to perform at their best in the recording studio or at home with the finest quality hi-fi equipment. The monitors' ability to reproduce music and speech with phenomenal accuracy, transparency and dynamics lies mainly in the SM75-150S soft dome midrange driver.
The SCM50 ASL (active) and SCM50 SL (passive) are designed to perform at their best in the recording studio or at home with the finest quality hi-fi equipment. The monitors' ability to reproduce music and speech with phenomenal accuracy, transparency and dynamics lies mainly in the SM75-150S soft dome midrange driver. However, recent modifications that include the new ATC SH25-76S tweeter and enhanced port profile have brought about further improvements to all performance parameters.

Each drive unit in the active model has its own dedicated and individually matched MOS-FET amplifier, while the 234mm/9″ bass driver incorporates ATC's unique Super Linear Magnet technology. Our active crossover network consists of a wide band-width, electronically balanced input stage with high common mode rejection and very low distortion. Like the HF, mid and bass drivers, all electronics are designed and manufactured in-house to create a no-compromise active system.

In passive form, the SCM50 SL provides broad and symmetrical dispersion, excellent amplitude and phase characteristics throughout the frequency range. Speakers are supplied with stands and fabric wrapped grills.

Available Finishes

Standard Veneers – Cherry, Walnut, Oak & Black Ash.

Standard Paints – Satin Black, Satin White

Premium Veneers (up-charge applies) – Rosewood, European Crown Cut Walnut, Pippy Oak, Burr Magnolia, Bur...
  • Drivers: HF 25mm Mid 75mm LF 234mm Super Linear
  • Amplitude Linearity: ±2dB: 70Hz – 20kHz
  • Frequency Response -6dB: 38Hz & 25kHz
  • Matched Response: ±0.5dB
  • Dispersion: ±80° Coherent Horizontal ±10° Coherent Vertical
  • Max continuous SPL @1m: 112dB SPL
  • Crossover Frequency: 380Hz & 3.5kHz
  • Input Connector: XLR
  • Input Sensitivity: 1V
  • Input Impedance: >10k ohms balanced XLR
  • Amplifier Output: HF 50 Watts RMS MF 100 Watts RMS LF 200 Watts RMS
  • Power Requirements: Voltage: 100, 115, 230 (factory set)
  • Power: Nominal 90 Watts, Driven 350 Watts
  • Cabinet Dimensions(HxWxD): 717 x 304 x 480mm (28.23 x 11.97 x 18.89")
  • Weight: 48.9kg
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Average Price
$20,001-$30,000
Used Products
40
 Available (Scroll Down)
Brand Popularity
45
 of 600+
Badges
Top 50 Brand
Top 250 Brand
Products
56
Founded
1974

Our take on the brand

ATC is distinguished by manufacturing all drivers in-house and using a unique dual-suspension system in their tweeters that enhances stability without ferro-fluid. The brand, widely used in recording studios, features sealed cabinet designs for tight bass control and a proprietary 75mm soft-dome midrange driver that delivers precise, uncolored sound.
Julian Shapiro
ExtremeHiFi
Brand Page
Most data on ExtremeHiFi is proprietary—researched and reviewed after thousands of hours of loving labor. We archive our site's data and its pages on Archive.org and take legal action against those repurposing the data. We also fingerprint data to know when text and numbers came from us first.
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What if you spend a bit more?

Three BXT
31155
31155
/
6
Reviews
Kii

Elegant and powerful, our BXT turns any pair of Kii THREE into unrivaled floor-standing speakers.

Kii Audio's unique "Active Wave Focusing" technology creates a cardioid pattern that minimizes room reflections and directs sound energy forward, allowing their speakers to maintain consistent sound quality even when placed near walls or corners. Each Kii THREE speaker uses six custom Ncore amplifiers and multiple DACs with advanced DSP processing to deliver full-range sound from a compact design that outperforms much larger systems.
Check on Amazon
Expand Details

Our Summary

Product Strengths

  • When combined with the BXT module, the system delivers tight, dynamic, and nuanced bass reproduction
  • The addition of the BXT allows the system to reveal subtle details in the lower frequencies that are typically missed
  • The BXT system offers a balanced sound, with the midrange frequencies benefiting from the addition of the BXT module
  • Are relieved of some bass duties, letting them focus more on the mids
  • The combination with the BXT module creates a cardioid dispersion pattern, reducing reflections from side and rear walls—minimizing the influence of room acoustics
  • Ease of use is another strength of the concept

Product Considerations

  • Some perceive it as sounding 'too digital' or 'too analytical' on its own, lacking the warmth of other speakers, but the BXT module helps to address this
  • The display on the Kii Control is considered small, making it difficult to read in poor lighting conditions

Comparisons (according to reviewers)

  • Versus ATC speakers, ATC speakers have a warmer, more colorful sound

Takeaway: The system, especially when paired with the BXT module, delivers exceptional sound quality with deep, controlled bass and reduced room interaction. For those wanting a system with great clarity and power, this could be a good pick.

Video review

Our take on the brand

Kii Audio's unique "Active Wave Focusing" technology creates a cardioid pattern that minimizes room reflections and directs sound energy forward, allowing their speakers to maintain consistent sound quality even when placed near walls or corners. Each Kii THREE speaker uses six custom Ncore amplifiers and multiple DACs with advanced DSP processing to deliver full-range sound from a compact design that outperforms much larger systems.
Julian Shapiro
ExtremeHiFi Writer
Visit our
Three BXT
page
Product Page

What else competes at this price?

PMC6-2 XBD
21000
/
Released
PMC
Adding a PMC8-2 SUB unit to a PMC6-2 monitor easily reconfigures them as PMC's renowned and flexible twin-cabinet format XBD monitor system. This system combines the PMC6-2's unrivalled clarity and resolution with an active sub to form a perfectly integrated full-range monitoring system that is ideal for all high-end music production.
Check on Amazon
PMC is a hifi speaker brand known for its Advanced Transmission Line (ATL) technology, which enhances bass response and reduces distortion, and its LaminairX technology in the Prophecy series, which reduces turbulence and harmonic distortion by up to 3dB. Their active speakers are preferred by music and audio professionals for their tonal accuracy and dynamic range, with user reviews particularly praising their accurate midrange and detailed sound compared to brands like Dynaudio and B&W.
Expand Details

Our Summary

Product Strengths

  • Extremely clear monitors, better for mixing and mastering than any other monitor besides other PMCs
  • Sounds like mains, with a really big sound footprint, unusual for near-field or mid-field monitors
  • Allows the user to make incredibly detailed, accurate decisions and be extremely happy with the results
  • Inspiring and musical sound, which empowers the user as an engineer and producer
  • The Sound Align software and graphic EQ works really well after a firmware update

Product Considerations

  • Benefits significantly from AES input, analog input may require a very accurate converter to achieve similar quality
  • Requires a very long break-in period
  • Firmware updates may be needed to ensure optimal performance of Sound Align
  • The Prism Lyra may not work well for AES monitoring

Takeaway: The PMC6-2 monitors are great for an engineer who wants to make detailed and accurate mix decisions, and they sound amazing. If you have AES, these could be the right monitors for your studio.

Video review

Our take on the brand

PMC is a hifi speaker brand known for its Advanced Transmission Line (ATL) technology, which enhances bass response and reduces distortion, and its LaminairX technology in the Prophecy series, which reduces turbulence and harmonic distortion by up to 3dB. Their active speakers are preferred by music and audio professionals for their tonal accuracy and dynamic range, with user reviews particularly praising their accurate midrange and detailed sound compared to brands like Dynaudio and B&W.
Julian Shapiro
ExtremeHiFi Writer
Visit
PMC6-2 XBD
Page
Product Page

Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.

What reviewers think

Magazine reviewers and YouTubers have tried this product—so we've summarized their strongest opinions below.

Product Strengths

  • ATC designs and builds every drive unit in-house, including voice coils, crossovers, and active amplification, allowing for complete control over every loudspeaker design decision
  • In the active version, a more clearly defined soundstage has clearer, more well-defined individual elements, where everything pops out more from the background
  • The active version has more energy, drive, and a more vivid overall presentation, resulting in a more tactile, energetic, and higher resolution sound
  • The SCM50's woofer has an enviable ability to resolve textures and timbral colors, capably rendering the skins of bass drums, the flutter of tom-toms, or the dark voicing of orchestral bass viols as bows are dragged across their strings
  • The SCM50 has an almost eerie immediacy that seems to glean the intent of the musician before their bow touches the string or a note escapes their lips, making piano reproduction breathtaking
  • Connectivity is limited to a single XLR input, which may require adapters for single-ended sources

Product Considerations

  • The active version is heavier than the passive version
  • The owner must manually turn each speaker on and off, as there is no trigger or auto startup circuit
  • The active version may pose challenges for owners of subwoofers needing high-level wiring connections, although workarounds exist
  • Careful attention must be paid to positioning a pair of SCM50s, as the full-bandwidth—ported design means that placing them too close to a boundary wall will result in bass bloom

Comparisons (according to reviewers)

  • SCM50 wins hands down over PureAudioProject Duet 15s for resolution, clarity, and dynamic shading
  • The active version excels over the passive in solidity of soundstage, neutrality, and ultimate detail retrieval

Takeaway: The ATC SCM50 offers exceptional sound quality, whether in its active or passive configuration, thanks to ATC's engineering and in-house design. The ATC SCM50 is a choice that will bring musical joy for years to come.

How useful are hifi reviews? We consider them useful for three things: (1) Surfacing new products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've ever heard (this means they probably are legitimately great). (3) Identifying a product's unique attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we  discount what reviewers say because they heap praise on everything—rarely being negative for fear of souring relationships with manufacturers. Further, they seldom have more than a couple products on-hand at once, relying on their imperfect memories to compare to past products.

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