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
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
Product Strengths
- Very nice openness and clarity
- Precise imaging with nice spreading
- Good resolution in the midrange
Product Considerations
- Large central area lacks some directness
- Not easily controllable
- Subwoofer needed
Takeaway: The HTS40 has very nice openness and clarity with precise imaging, making it a great option for building a serious cinema. Its design considers wall placement to ensure a balanced sound.
All
HTS40
reviews

Manufacturer details
Drivers:
High Frequency: ATC 25mm Neo Soft Dome
Mid: ATC 75mm Soft Dome
Low Frequency: ATC 164mm SC
Matched Response: +/- 0.5dB
Frequency Response:
Half Space Radiation -6dB: 32Hz–22kHz
Dispersion: ±80° Coherent Horizontal, ±10° Coherent Vertical
Sensitivity: 85dB @ 1W @ 1metre
Max SPL: 112dB
Recommended Power Amplifier: 75 to 300 Watts
Nominal Impedance: 8 Ohm
Crossover Frequency: 380Hz & 3.5kHz
Connectors: Binding Posts/4mm Plugs
Cabinet Dimensions (HxWxD):
With Grill: 740 x 380 x 166mm / 29.13 x 14.96 x 6.54″
Without Grill: 740 x 380 x 154mm / 29.13 x 14.96 x 6.06″
Horizontal
With Grill: 380 x 740 x 166mm / 14.96 x 29.13 x 6.54″
Without Grill: 380 x 740 x 154mm / 14.96 x 29.13 x 6.06″
HTS40/HTS40C models employ an identical cabinet but with a different HF driver position.
Weight: 23kg
Brand highlights
Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:
- ATC's commitment to in-house driver design and manufacturing allows for tight control over performance characteristics and seamless integration across their entire product line.
- They primarily use active designs with electronic crossovers and dedicated amplifiers for each driver, optimizing power delivery and minimizing distortion compared to passive crossovers.
- ATC speakers prioritize accuracy, neutrality, and wide dynamic range, resulting in a sound signature that may expose flaws in recordings or upstream components.
Select products
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.
Our take on the brand
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Used
ATC
What if you spend more?
Wharfedale’s new EVO4 has grown out of the extensive research and development that produced the ELYSIAN flagship loudspeakers and borrows much of the technology involved in ELYSIAN.
Our summary
Product Strengths
- Excellent focus and separation, with the speakers 'disappearing' to create a natural soundstage
- Impressive low-end performance, adding authority to the music
- Cohesive driver integration, with no perceivable handover between the AMT tweeter, midrange dome, and woofer
- Remarkable neutrality in the midrange, with a detailed yet smooth treble—avoiding harshness even at higher volumes
- Clear and detailed sound reproduction, extracting nuances and levels of information outstanding for its price
Product Considerations
- Vertical off-axis performance of the AMT tweeter is not good, so correct speaker height and toe-in are important
- Soundstage is not super wide, with the presentation mostly between the speakers
- Some reviewers found the aesthetics or proportions to be awkward or not to suit all tastes
- Bass may be a bit polite for some listeners wanting subwoofer-type rumble
- The midrange can be fatiguing if the listener's ear is at the midrange driver level
Takeaway: The Evo4.2 is a well-rounded speaker that delivers excellent sound quality with impressive imaging, detail, and tonal balance. It is capable of providing an audiophile experience at an affordable price.
Video review
Our take on the brand
ASC - Active Stereo Calibration | Cross-stereo | 30Hz -20kHzDevialet Mania, our first high fidelity portable smart speaker with 360° stereo sound translates our obsession for pure sound.Metamorphic sound.Devialet Mania, the portable speaker ushers in a liberated approach to sound: more spontaneous, more adaptable, more obsession-inducing than ever. Thanks to its adaptive cross stereo, Devialet Mania offers a soundstage that morphs and adapts to any physical space, eliciting expansive 360° stereo sound. Cue your favorite music and feel the emotional imprint it leaves on you and those around you.Devialet Mania edition package also comes with a complimentary Devialet Mania Station.
Our summary
Product Strengths
- One of the best-sounding portable Bluetooth speakers
- Built-in Alexa support eliminates the need for additional devices to control music with voice
- Solid design, IPX4 water resistance rating, and built-in handle
Product Considerations
- Insufficient loudness for large rooms
- Lacks some treble out-of-the-box
- Battery life can be short—around 4 hours in some tests
Comparisons (according to reviewers)
- The Sonos is likely a better value for most users since it features a longer battery life and a more balanced sound out-of-the-box
Takeaway: The Devialet Mania is a portable speaker that redefines expectations with its impressive sound quality and bass energy. It offers a unique listening experience that's worth the purchase.
Video review
Our take on the brand
Our summary
Product Strengths
- Attractive design with rounded cabinet edges and multiple finish options (Satin Black, Satin White, Santos Rosewood, Holme Oak)
- Good midrange reproduction—clean and uncolored—especially for the price
- Clear and detailed sound with good separation of instruments
- Taut and agile bass performance
- Internal bracing (P2P) stiffens the cabinet, reducing vibrations and improving stereo image
- Connectivity options such as binding posts
Product Considerations
- Can tend towards brightness, potentially causing fatigue during longer listening sessions—especially with the wrong equipment pairing
- Cabinet size is relatively large for a bookshelf speaker
- Bass response is somewhat subdued
- Some reviewers noted imaging issues, with vocals lacking a firm presence in the center
- Grilles muddle the sound
Takeaway: The Q Acoustics 5020 is a great-looking speaker that offers a rich and musical sound, making it a very entertaining listen for the price. With its ability to reveal details from recordings, it's a wise choice for those looking for a well-built and sonically pleasing speaker.
Video review
Our take on the brand
Product Strengths
- Larger horn tweeter and a new Cerametallic woofer, compared to its predecessor
- Upgraded binding posts and crossover plate elevate to Reference Premiere status
- Larger diameter voice coils and aluminum shorting rings on the woofers give the speaker better linearity throughout the bass, decrease distortion while upping power handling resulting in improved speed and accuracy
- Better detail retrieval, more articulate bass, and vastly improved soundstage width and imaging, compared to the RP-600M
- The binding posts are the same that are found on costlier Heritage speakers
Product Considerations
- Finish options did not receive an upgrade over the outgoing model, leaving customers with the same ebony or walnut wraps
- The tweeter may be too bright for some listeners who are sensitive to a more aggressive top end
- Rated sensitivity is 94.5dB, which is a decrease compared to the original's reported sensitivity of 96
- Needs a bit of space behind them and to the sides, or at least positioning on open shelves, if the powerful output from that port isn't to muddy the sound
Comparisons (according to reviewers)
- Compared to the older RP-600M, the new sounds far more linear
- The new is very easy to listen to for long periods of time, and while it still has a presence, a speed and transparency to the artist or instrument—at least with respect to the midrange—it is not as forward sounding as past designs
- The new proved to be surprisingly flat, but best of all, not the least bit fatiguing
- There was very little difference in tone with respect to the mids between the new and a costlier Revel bookshelf
- These two are actually pretty neck and neck
- As for the Wharfedale Evo 4.1, the Evo is better constructed, not to mention nicer looking
Takeaway: The RP-600M II is a refined speaker with better components, improved sound, and better bass response and imaging. It's a speaker that would be great for someone who likes to listen to a variety of music genres and wants a good-sounding speaker that can last a long time.
Video review
Our take on the brand
What competes at this price?
Our Summary
Product Strengths
- Effortlessly detailed and balanced sound
- Excellent stereo imaging and dynamics
- High-quality Bluetooth streaming
- Simple setup and control
- Multiple connection options, including subwoofer output, digital input for TV, and analog inputs
Product Considerations
- No HDMI ARC for seamless control with TV remote
- No dedicated app for adjusting settings
- Bass output may be lacking for some listeners, potentially requiring a subwoofer
- Grilles are non-removable
- Speakers power down after 20 minutes at rest, requiring manual Bluetooth pairing each time
Comparisons (according to reviewers)
- Compared to Ruark Audio MR1 Mk2, the Q Acoustics M20 sounds fuller, louder and less compressed
Takeaway: The Q Acoustics M20 HD speakers offer detailed, balanced sound and are easy to set up with various devices. They're a versatile audio solution for upgrading sound, whether for music, movies, or gaming.
Video review
Our take on the brand
Our Summary
Product Strengths
- Good ability to get loud, clean sound without distortion or compression issues above 80 Hz when paired with a subwoofer
- Really good build quality cabinet
- Very clear, immediate, vivid sounding speaker
- Ultra-focused sounding, clean, and nicely balanced vocals
- A lot of treble liveliness combined with quality clarity and crispness
Product Considerations
- Treble is a little bit bright
- Not the most neutral speaker
- Leaner sound in terms of bass delivery
- Very tight, tuneful, and on-point bass, but the perceived amount of bass is less substantial than other speakers reviewed
- Some port noise or chuffing can be heard when setting the speakers to deliver as much bass as the Klipsch RP600M
Takeaway: The SVS Prime bookshelf is a sweet little speaker that delivers clear and vivid sound and has great build quality. It's also versatile, as it can be used in a stereo setup or as part of a home theater system.
Video review
Our take on the brand
Our Summary
Product Strengths
- Improved stereo sound compared to the original Move, due to the addition of dual tweeters
- Significantly longer battery life—advertised up to 24 hours—making it suitable for extended use indoors and outdoors
- Designed with portability in mind, featuring a built-in handle for easy carrying and an IP56 rating for dust and water resistance
- The speaker benefits from the Auto Trueplay feature, which automatically optimizes the sound to the unique acoustics of your space, delivering a balanced audio experience
- Versatile connectivity options including Wi-Fi, Bluetooth, and AirPlay 2, and can even stream Bluetooth audio to other Sonos speakers
Product Considerations
- Considered hefty and not as easily portable as smaller options like the Sonos Roam
- Google Assistant is no longer supported, which may be a drawback for users heavily invested in the Google ecosystem
- It cannot be used as a speakerphone for calls
- Despite being a stereo speaker, channel separation isn't always very distinct, and it can sound more like an expansive mono speaker
- An adapter is needed for a line-in connection, and a carrying case are sold separately, which increases the overall cost
Comparisons (according to reviewers)
- Vs Sonos Move: The Move 2 offers stereo playback—as opposed to mono—longer battery life, and more connectivity options
- Vs Sonos Roam: The Move 2 sounds better and gets louder, but the Roam is smaller and lighter
- Vs Sonos Era 300: The Era 300 has Dolby Atmos support, but is not portable or water-resistant like the Move 2
- Vs Sonos Era 100: The Move 2 can be taken on the go unlike the Era 100 and is rated for dust and water resistance
- Vs Bose SoundLink Max: The Sonos Move 2 sounds a bit more balanced out of the box, and its battery can even be replaced down the line, while the Bose has a longer-lasting battery and doesn't require an adapter to connect to analog line-in sources, but it can't connect to Wi-Fi
Takeaway: The Sonos Move 2 is a versatile and improved portable speaker, offering great sound and battery life for both indoor and outdoor use, and its integration with the Sonos ecosystem makes it an easy choice for existing Sonos users.
Video review
Our take on the brand
Our Summary
Product Strengths
- Simple Bluetooth speaker connects and pairs easily without needing an app
- Rated IP67 against water and dust, making it durable for splashes and rain
- Can be used to charge other small devices via USB-C
- Lightweight and portable, making it easy to carry around with a removable lanyard
- Plays nicely with both iOS and Android devices
Product Considerations
- The soft touch rubber coating is a dust magnet
- The Beats app is barebones, with no EQ controls
- Can't playback stereo content without pairing another speaker
- Audio can get muddy and lose detail at high volumes
- Some controls have a learning curve
Comparisons (according to reviewers)
- Vs Beats Pill+: The 2024 Beats Pill is lighter, has better build quality, a more balanced sound, and support for voice assistants, but lacks Bluetooth multipoint support and stereo playback without pairing
- Vs JBL Flip 6: Has a more balanced sound out-of-the-box, a longer battery life, and voice assistant support, but JBL is better built and offers a graphic EQ in the companion app
Takeaway: The Beats Pill is a simple, portable, and durable Bluetooth speaker that sounds good, especially at its price. It's easy to connect to devices and take anywhere.
Video review
Our take on the brand
Our Summary
Product Strengths
- Impressive spatial audio delivers a more immersive and 3D soundscape compared to traditional stereo, when playing Dolby Atmos content
- Wide, room-filling sound projects further and more confidently than other similar wireless speakers
- Can be used as Dolby Atmos surround speakers, delivering multi-channel rears for the first time
- Includes both Bluetooth and Wi-Fi (Wi-Fi 6) connectivity
Product Considerations
- The spatial audio experience is heavily dependent on the quality of the Dolby Atmos mix, and some mixes can be disappointing
- Touch controls don't provide the tactile feedback of physical buttons
- The Sonos app can be slow and not always intuitive to use
- Spatial audio tracks can only be played over Wi-Fi, not Bluetooth
- No Google Assistant
Comparisons (according to reviewers)
- The Era 300 offers a more refined sound, with a deeper bassline and better wraparound sound, compared to Amazon Echo Studio
- The Era 300 has better dynamics, and supports Dolby Atmos, compared to Sonos Five—the slightly larger Five can reproduce a more extended low bass and offers superior stereo music playback
- Era 300 gets slightly louder and has slightly better directivity and features both Wi-Fi and Bluetooth compatibility, whereas the Apple HomePod (2nd generation) can only connect via Wi-Fi
Takeaway: The Sonos Era 300 excels at spatial audio playback, and the spatial audio from a single wireless speaker feels detailed, engaging and accomplished. It's a great addition to any home, offering immersive sound for both music and movies.
Video review
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