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.

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.
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Read the reviews

Manufacturer's notes

Large format main monitor. 34mm soft dome tweeter. Twin full spec “SL” 12″/314mm bass drivers. ATC 75mm “Super Dome” mid driver. P4 rack-mount grounded source 850W class A/B amplifier. 6 year warranty.
  • Drivers: HF 1.25"/34mm, Mid 3"/75mm, LF 2 x 12"/314mm
  • Amplitude Linearity: ±2dB 60Hz-12kHz
  • Cut-off Frequencies (-6dB, free-standing): 32Hz, 20kHz (free standing) 25Hz, 20kHz (soffit mounted)
  • Horizontal Dispersion: ±80°
  • Vertical Dispersion: ±10°
  • Max. Continuous SPL (1 metre): 118dB
  • Crossover Frequencies: 380Hz, 3.5kHz
  • Dimensions (HxWxD): 832 x 728 x 424mm (32.8" x 28.7" x 16.7")
  • Weight: 79kgs (174lbs)
  • Audio Input: Rear panel mounted female xlr (pin 2 +)
  • Input Sensitivity: 2V
  • Input Impedance: Balanced > 10kΩ
  • Amplifier Output: Bass 275+275W, Mid 200W, High 100W
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Average Price
$30,001-$40,000
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?

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What else competes at this price?

Three BXT
31155
/
Released
Kii
The Kii THREE BXT system is an exceptional upgrade designed to enhance any Kii THREE setup's acoustical accuracy and clarity. This system adds eight extra drivers and a powerful 2,000 watts of amplification per speaker (16 drivers and 7,000 watts total per pair) in a sleek floor-standing module. It extends the range and sound pressure level of the Kii THREE and preserves its unique room-friendly cardioid system for precise, proper directionality.
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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.
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
Three BXT
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.

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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