Audio T Verdict
The ATC SCM19 is a serious standmount speaker for listeners who value transparency, tonal accuracy and controlled dynamics over exaggerated bass or a deliberately flattering presentation.
Its substantial 150mm Super Linear mid/bass driver gives vocals and instruments exceptional clarity, while the sealed cabinet produces bass that is fast, well defined and easier to understand rhythmically than many reflex-loaded alternatives.
The SCM19 is larger and considerably heavier than the SCM11, and its 85dB sensitivity means that capable amplification and properly load-rated stands are essential. Given the right support and system, it delivers much of ATC’s studio-derived performance in a comparatively room-friendly cabinet.
ATC SCM19 Passive Standmount Speakers
The ATC SCM19 is the largest passive standmount speaker in ATC’s Entry Series and is supplied as a stereo pair.
It combines ATC’s 150mm Super Linear mid/bass driver with a 25mm soft-dome tweeter inside a heavily constructed sealed cabinet.
The result is a revealing loudspeaker capable of producing natural voices, finely resolved instruments and tightly controlled bass without relying on an exaggerated tonal balance.
ATC 150mm Super Linear Driver
The SCM19 uses ATC’s 150mm SL mid/bass driver with an integral 75mm soft dome.
Super Linear motor technology is designed to reduce magnetic distortion within the driver, improving clarity and low-level resolution through the critical midrange.
The driver also uses a 9kg optimised short-coil and long-gap motor assembly together with an in-house, hand-wound precision flat-wire voice coil.
This substantial construction allows the SCM19 to reproduce vocals and instruments with excellent control while retaining the dynamic ability required for more demanding music.
ATC 25mm Soft-Dome Tweeter
High frequencies are handled by an ATC-designed and manufactured 25mm neodymium soft-dome tweeter.
A precision alloy waveguide controls dispersion and assists the transition between the tweeter and the large mid/bass driver.
ATC matches the response of the speakers to within approximately 0.5dB, supporting stable stereo imaging and consistent tonal balance across the pair.
Sealed Cabinet Design
The SCM19 uses a sealed enclosure rather than a reflex port.
This avoids port noise and gives the speaker a controlled low-frequency character that prioritises speed, pitch definition and timing over artificially enhanced bass weight.
A sealed cabinet can also make positioning more manageable near room boundaries, although placing any speaker too close to a wall or corner will still increase bass output.
54Hz to 22kHz Frequency Response
ATC specifies a frequency response extending from 54Hz to 22kHz at the stated minus 6dB points.
The SCM19 is designed to reproduce the bass contained within the recording accurately rather than adding an upper-bass lift to create an impression of greater cabinet size.
A carefully integrated active subwoofer can extend the lowest frequencies where the room, music or listening preferences require it.
The
ATC C1 Sub Mk2
provides a natural ATC option for extending the system’s low-frequency performance.
85dB Sensitivity and Amplifier Matching
The SCM19 has a sensitivity of 85dB at one watt and one metre, with an 8-ohm nominal impedance and a relatively flat impedance characteristic.
ATC recommends amplification between 75W and 300W. Amplifier quality, current delivery, room size and listening distance should all be considered alongside the stated output power.
Suitable ATC partners include the
ATC SIA2-100 integrated amplifier
and the
ATC P1 stereo power amplifier
.
Amplifier Quality Matters
The SCM19’s even impedance makes it a relatively predictable electrical load, but its moderate sensitivity rewards an amplifier that can deliver clean power without strain.
A smaller amplifier driven into clipping may be more harmful than a more powerful design used responsibly.
Choosing Suitable Speaker Stands
Each SCM19 weighs 17.8kg, so its stands must be rated to support the cabinet safely and provide a sufficiently large, stable top plate.
Stand height should position the tweeter close to seated ear level. The speaker should remain securely centred and should not be pulled towards the edge of the stand by heavy or tightly routed cables.
Many lighter domestic stands are rated below the SCM19’s weight, so load capacity must be checked rather than assumed.
Browse our range of
speaker stands
or speak to your local Audio T store about the correct height, top plate and weight capacity.
Room Positioning
Begin with the speakers positioned symmetrically and given moderate clearance from the rear and side walls.
Adjust the distance between the speakers, their wall clearance and toe-in gradually while listening to familiar recordings.
The preferred position should produce a stable central image, even bass and a natural tonal balance without making the presentation overly lean or heavy.
Bi-Wire Connections
The SCM19 provides bi-wire binding posts compatible with suitable 4mm plugs.
For normal single-wire operation, the terminal links must remain securely fitted. Bi-wiring uses separate cable runs from the same amplifier channel to the high-frequency and mid/bass terminals.
External bi-amplification should only be attempted when the complete connection arrangement is fully understood and the terminal links have been removed.
SCM11, SCM19 or SCM40?
ATC SCM11
- Smaller sealed standmount design
- 150mm CLD mid/bass driver
- 56Hz low-frequency extension
- 10.9kg per speaker
- Better suited to smaller rooms and stands
View the ATC SCM11
ATC SCM19
- Largest passive Entry Series standmount
- 150mm Super Linear driver
- Integral 75mm soft dome
- 17.8kg per speaker
- Greater midrange resolution and dynamic scale
ATC SCM40
- Three-way floorstanding design
- Dedicated 75mm soft-dome midrange
- Greater bass extension and maximum output
- No separate speaker stands required
- Suited to larger rooms and listening distances
View the ATC SCM40
Passive SCM19 or Active SCM19A?
SCM19 Passive
- Requires an external stereo amplifier
- Allows independent amplifier choice
- Conventional speaker-cable connection
- Compact standmount cabinet
- No mains connection at the speakers
SCM19A Active
- Built-in active crossover and amplification
- No external power amplifier required
- Requires a pre-amplifier or variable output
- Floorstanding cabinet format
- Each speaker requires mains power
View the ATC SCM19A active speakers
Home Cinema Matching
The SCM19 can form the front-left and front-right channels of a high-performance ATC home cinema system.
The
ATC C3C centre speaker
is designed to match the SCM11, SCM19 and SCM40, helping dialogue and effects move consistently across the front soundstage.
Smaller ATC speakers can be used for suitable surround positions, with an active subwoofer handling the deepest bass and low-frequency effects.
Finish Options
Cherry
A natural real-wood veneer with individual variation in grain and shade.
Black Ash
A dark real-wood veneer with visible grain and an understated appearance.
Satin Black
A uniform painted finish suited to contemporary systems and darker furniture.
Satin White
A brighter painted finish designed to complement lighter rooms and modern interiors.
System Matching
Well Suited To
- Medium-sized listening rooms
- High-quality passive stereo systems
- Amplifiers offering clean, controlled power
- Listeners prioritising clarity and tonal accuracy
- Dedicated speaker-stand installations
- Stereo and home cinema systems
Check Before Buying
- Each speaker weighs 17.8kg
- Load-rated speaker stands are essential
- 85dB sensitivity rewards capable amplification
- The grille adds 34mm to cabinet depth
- Stand height must suit the seated listener
- Natural veneers vary in appearance
Setup Guidance
- Use rigid and stable speaker stands
- Keep the tweeters near seated ear height
- Begin with moderate wall clearance
- Adjust toe-in using familiar recordings
- Keep terminal links fitted for single wiring
- Check speaker-cable polarity carefully
Browse our
stereo speakers
,
Hi-Fi amplifiers
,
speaker stands
,
Hi-Fi subwoofers
and
speaker cables
, or explore the complete
ATC range at Audio T
.
Key Features
- Two-way passive standmount speaker system
- Supplied as a stereo pair
- ATC-designed and built 25mm soft-dome tweeter
- Precision alloy tweeter waveguide
- ATC 150mm Super Linear mid/bass driver
- Integral 75mm soft dome
- 9kg short-coil and long-gap motor assembly
- In-house, hand-wound precision flat-wire voice coil
- Sealed cabinet design
- Flat amplifier-friendly impedance characteristic
- 54Hz to 22kHz frequency response
- 85dB sensitivity
- 108dB maximum sound pressure level
- 75W to 300W recommended amplifier range
- Bi-wire binding posts
- Cherry, Black Ash, Satin Black and Satin White finishes
- Six-year ATC warranty, subject to current terms
Frequently Asked Questions
Are the ATC SCM19 speakers supplied as a pair?
Yes. The SCM19 is supplied as a stereo pair.
Do the SCM19 speakers require stands?
Yes. Each stand must safely support a 17.8kg cabinet and position the tweeter close to seated ear height.
How powerful should the amplifier be?
ATC recommends amplification between 75W and 300W. Amplifier quality, room size and listening level should also be considered.
Are the SCM19 speakers rear ported?
No. They use a sealed cabinet, providing controlled bass without a reflex port.
Can they be single wired?
Yes. Leave the terminal links securely fitted when using one speaker-cable run to each cabinet.
Can a subwoofer be added?
Yes. A properly positioned and adjusted active subwoofer can extend the system’s low-frequency performance.
What is the difference between the SCM19 and SCM19A?
The SCM19 is a passive standmount speaker requiring external amplification. The SCM19A is an active floorstanding design with amplification built into each cabinet.
How large and heavy is each speaker?
Each cabinet measures 438 x 265 x 300mm and weighs 17.8kg. The grille adds 34mm to the cabinet depth.
Why Buy From Audio T?
- ATC amplifier and source matching advice
- Load-rated speaker-stand recommendations
- Room-positioning and toe-in guidance
- Single-wire and bi-wire cable advice
- Comparison with the SCM11, SCM40 and SCM19A
- Subwoofer and home cinema system matching
- Demonstrations with suitable amplification
- Ongoing setup and system-development support
Contact your local Audio T store
to discuss matching the ATC SCM19 with your amplifier, speaker stands and listening room.