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
- Excellent mids with great width and clarity make them very easy to listen to
- Super tight and really together low end
- New tweeter is more revealing yet sweeter, offering more charm without losing transparency
- Astonishing bass control, extraordinary detail, coherence and extension
Product Considerations
- Speakers may not sound as bassy as expected at first listen, requiring some acclimation
- The speaker is a 'foursquare block that makes no concessions to the contemporary fashion for slim baffles and minimal domestic intrusion'
Comparisons (according to reviewers)
- SCM150ASL does not have an aggressive low end like PMCs, but the low end is super tight
Takeaway: The SCM150ASL speakers provide a lovely and easy-to-listen-to sound, with a tight low end and excellent mids. The new tweeter makes this model more charming without losing transparency.
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.
Read the reviews

Manufacturer's notes
- Drivers: HF 1"/25mm, Mid 3"/75mm, LF 15"/375mm
- Amplitude Linearity: ±2dB 60Hz-17kHz
- Cut-off Frequencies (-6dB, free-standing): 25Hz, 25kHz
- Horizontal Dispersion: ±80°
- Vertical Dispersion: ±10°
- Max. Continuous SPL (1 metre): 117dB
- Crossover Frequencies: 380Hz, 3.5kHz
- Audio Input: Rear panel mounted female XLR (pin 2 +)
- Input Sensitivity: 1V
- Input Sensitivity Trim: 0dB to -6dB/1V – 2V
- Input Impedance: Balanced > 10kΩ
- Amplifier Output: Bass 200W, Mid 100W, High 50W
- LF EQ: 0dB to+6dB @ 40Hz
- Dimensions (HxWxD): 884 x 498 x 568mm (34.8" x 19.6" x 22.4")
- Weight: 75kg (165lbs)
Our take on the brand
Used
ATC
What if you spend a bit more?

Elegant and powerful, our BXT turns any pair of Kii THREE into unrivaled floor-standing speakers.
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
What else competes at this price?

Our Summary
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.
Video review
Our take on the brand

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
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
- Excellent mids with great width and clarity make them very easy to listen to
- Super tight and really together low end
- New tweeter is more revealing yet sweeter, offering more charm without losing transparency
- Astonishing bass control, extraordinary detail, coherence and extension
Product Considerations
- Speakers may not sound as bassy as expected at first listen, requiring some acclimation
- The speaker is a 'foursquare block that makes no concessions to the contemporary fashion for slim baffles and minimal domestic intrusion'
Comparisons (according to reviewers)
- SCM150ASL does not have an aggressive low end like PMCs, but the low end is super tight
Takeaway: The SCM150ASL speakers provide a lovely and easy-to-listen-to sound, with a tight low end and excellent mids. The new tweeter makes this model more charming without losing transparency.
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