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

  • Very superior coherence through the critical crossover and presence regions
  • Warm, lively, and essentially neutral sound, with superior musical communication skills
  • Precise and tightly focused imaging, capable of delivering decent depth and ambience

Product Considerations

  • Genuinely deep bass is somewhat restricted
  • Bass could be a bit punchier

Comparisons (according to reviewers)

  • Vs Amphion Prio—Helium 520 has all the good qualities shown by the Prio, most notably its very superior coherence
  • Vs Amphion Prio—Helium 520 does so with improved smoothness right across the band, including the previously slightly troublesome bass alignment compared to the Prio

Takeaway: The Amphion Helium 520 is an exceptional speaker with a rare combination of warmth, neutrality, coherence and fine imaging. It offers excellent value, making it hard to find a better option in its price range.

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.

Helium 510

  • Positioning: A versatile bookshelf loudspeaker positioned as the most popular model in the Helium series.
  • Description: Offers exceptional midrange clarity and a room-wide sweet spot, making it ideal for small to medium-sized rooms. Its low crossover point and seamless driver integration set it apart from the Argon series, which focuses more on bass extension. This model is perfect for those seeking high performance at lower listening volumes without the need for extensive amplification.

Argon 0

  • Positioning: A compact desktop loudspeaker designed for high performance in small spaces.
  • Description: Praised for its natural sound and compact design, making it perfect for desktop use or small rooms. Unlike the larger Argon models, it focuses on delivering high-quality sound in a smaller form factor.

Argon 1

  • Positioning: A reference-quality bookshelf loudspeaker offering a balance of performance and affordability.
  • Description: Provides a clean and detailed sound with a surprisingly low-reaching bass, making it suitable for both music and home theater use. It offers a more refined midband compared to the Argon 0, appealing to those who prioritize sound quality over compactness.

Argon 7LS

  • Positioning: A floorstanding loudspeaker known for its deep emotional impact and high performance.
  • Description: Uses technologies from Amphion's flagship studio monitors, providing a wide soundstage and exceptional clarity. It offers a more immersive experience compared to the bookshelf models.

Krypton 3X

  • Positioning: Amphion's flagship floorstanding loudspeaker, representing the pinnacle of their audio technology.
  • Description: Features a unique cardioid midrange design that minimizes unwanted reflections, making it suitable for challenging acoustic environments. Its innovative design and powerful bass response set it apart from the Argon series, offering a full-range sound that is unmatched in the lineup.
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

Helium520 floorstanding loudspeakers are slim and easy to place. Despite their elegant looks, no sonic compromizes were allowed when making them. Advanced acoustics design allows you to enjoy remarkable midrange resolution even at low listening levels.
  • Operating principle: Two-way, vented
  • Drivers: 1" titanium tweeter, 2x 5¼" paper woofer
  • Crossover point: 1600 Hz
  • Impedance: 4 Ω
  • Sensitivity: 90 dB
  • Frequency response: 40 – 25.000 Hz -6dB
  • Power recommendation: 10 – 150 W
  • Dimensions (H x W x D): 1068 x 218 x 270 mm (42.05" x 8.58" x 10.63")
  • Dimensions without base plate: 1040 x 160 x 215 mm (40.94" x 6.3" x 8.46")
  • Grid protrusion: 8 mm (0.3")
  • Weight: 17 kg (37.5 lbs)
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Average Price
$2,501-$5,000
Used Products
10
 Available (Scroll Down)
Brand Popularity
94
 of 600+
Badges
Top 50 Brand
Top 250 Brand
Products
21
Founded
1998

Our take on the brand

Amphion is a Finnish hifi speaker brand that uses passive radiators instead of bass ports and places the crossover point at 1600 Hz (below critical hearing range) to achieve better phase coherence and driver integration. Their speakers, handmade in Finland, are particularly popular in professional studios due to their waveguide technology and electrically simple design that enhances resolution while creating a seamless soundstage.
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?

LS60 Wireless
5499
5499
/
19
Reviews
KEF

Bring the track spirit into your home with LS60 Wireless Lotus Edition, created in partnership with and inspired by the British Racing Green of the iconic brand.

KEF's signature Uni-Q technology places the tweeter in the center of the woofer to create a single point source for sound, while their Metamaterial Absorption Technology absorbs 99% of unwanted sound from the rear of the driver. Their Music Integrity Engine corrects timing errors in the speaker crossover, and their Shadow Flare technology reduces diffraction for improved detail and clarity in sound reproduction.
Check on Amazon
Expand Details

Our Summary

Product Strengths

  • Striking, sleek, and modern design that complements modern interiors
  • Incorporates KEF's Uni-Q driver array and Metamaterial Absorption Technology (MAT) for neutral, open, detailed sound, reducing unwanted sound from the rear of the tweeter
  • Includes Uni-Core force-canceling woofers that reduce cabinet vibrations, contributing to balanced and detailed bass
  • The KEF Connect app allows for adjustments to fit the listening environment
  • Offers high connectivity and is a true stand-alone system

Product Considerations

  • Bass can be a bit too much out of the box, requiring adjustments via the app or placement considerations
  • Not well-suited for those who have many signal sources to connect to
  • Some reviewers found the bass lacked definition in the upper bass, with unclear instrument placement, even after adjusting EQ settings
  • The included remote control is considered basic or cheap
  • Mandatory online registration and administrator-level internet connection requirements for the app may be a drawback for privacy-conscious users

Comparisons (according to reviewers)

  • Compared to the Bang & Olufsen Beolab 28, the LS60 Wireless can achieve similar sound quality with adjustments, at a lower price point, although the Beolab 28 sounds 'more right' straight out of the factory
  • Compared to the KEF LS50 Wireless II, the LS60 Wireless is preferred stylistically, achieves near full-range playback, and has a more slim design, although it costs more and also provides much deeper bass
  • Compared to the Q Acoustics Active 400 Towers, the LS60 Wireless has no issues with products not working

Takeaway: The KEF LS60 Wireless are stylish, all-in-one speakers that deliver a balanced, detailed sound with advanced technology. They are a convenient, high-performing solution for those seeking a streamlined audio setup.

Video review

Our take on the brand

KEF's signature Uni-Q technology places the tweeter in the center of the woofer to create a single point source for sound, while their Metamaterial Absorption Technology absorbs 99% of unwanted sound from the rear of the driver. Their Music Integrity Engine corrects timing errors in the speaker crossover, and their Shadow Flare technology reduces diffraction for improved detail and clarity in sound reproduction.
Julian Shapiro
ExtremeHiFi Writer
Visit our
LS60 Wireless
page
Product Page
703 S3
5999
5999
/
11
Reviews
Bowers & Wilkins
Bowers & Wilkins pioneered the use of Kevlar fibers in speaker cones and developed the Matrix cabinet design, which significantly reduces cabinet resonance and sound coloration. Their Nautilus speaker, introduced in 1993, features the distinctive Nautilus tube tweeter design that minimizes sound resonance, while their dedicated Steyning Research facility has produced breakthroughs like the Continuum cone for improved audio transparency.
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Expand Details

Our Summary

Product Strengths

  • Superb design and build quality.
  • Articulate sound, especially in the upper midrange and treble regions.
  • Very good imaging, with strong definition and delineation between instruments and performers.
  • Vivid and clear midrange, revealing subtle details in recordings.
  • Transparency ensures more of the music is heard as it was intended.

Product Considerations

  • A capable amplifier is needed due to impedance dips to 3.1 ohms.
  • Not a bass-heavy speaker.
  • The tweeter can become too much if listening to poorly recorded music or at very high volumes.
  • The bass can sound a bit thin, depending on room size and personal preference.
  • Can sound a little bit cool when playing certain types of music.

Comparisons (according to reviewers)

  • Vs KEF R11 Meta—KEFs presented more physical scale with respect to soundstage, with even greater width.
  • Vs Polk R700 and Klipsch RP8000F Mk2—Not better than the B&Ws, but aren't embarrassed by them either.
  • Vs B&W 805 D IV—In one listening room, the 703 is nearly as good.
  • Zoo sound a little bit warmer.

Takeaway: The 703 S3 makes listening engaging and fun, with dynamic sound suitable for both music and movies. It brings clarity to vocals, especially at lower volumes, making it great for late-night listening.

Video review

Our take on the brand

Bowers & Wilkins pioneered the use of Kevlar fibers in speaker cones and developed the Matrix cabinet design, which significantly reduces cabinet resonance and sound coloration. Their Nautilus speaker, introduced in 1993, features the distinctive Nautilus tube tweeter design that minimizes sound resonance, while their dedicated Steyning Research facility has produced breakthroughs like the Continuum cone for improved audio transparency.
Julian Shapiro
ExtremeHiFi Writer
Visit our
703 S3
page
Product Page
702 S3
6999
6999
/
9
Reviews
Bowers & Wilkins
Bowers & Wilkins pioneered the use of Kevlar fibers in speaker cones and developed the Matrix cabinet design, which significantly reduces cabinet resonance and sound coloration. Their Nautilus speaker, introduced in 1993, features the distinctive Nautilus tube tweeter design that minimizes sound resonance, while their dedicated Steyning Research facility has produced breakthroughs like the Continuum cone for improved audio transparency.
Check on Amazon
Expand Details

Our Summary

Product Strengths

  • Trickle-down technology from the 800 series narrows the gap with higher-end models
  • Improved clarity of details, accuracy, and soundstage width compared to previous 702 models
  • Clean and articulate bass is often attributed to the downward-firing port and plinth arrangement
  • Excellent imaging and soundfield, with impressive width and height
  • Delivers high definition and low coloration, offering a taste of the 800 Series experience

Product Considerations

  • Careful positioning is required to achieve optimal tonal balance and musicality
  • A reasonably powerful amplifier (minimum 75W recommended) is needed to perform at its best
  • May not be a great match for valve amplifiers, preferring solid-state options
  • The satin black MDF plinths are integral and require additional floor space
  • Difficult to move around due to their weight (over 40 kg each) and lack of handholds

Comparisons (according to reviewers)

  • Compared to the 702 S2 and 702 Signature, the S3 has improved clarity, accuracy, and soundstage width
  • Compared to the Focal Aria 936 K2, the reviewer prefers the aesthetics of the 702 S3

Takeaway: The 702 S3 is a well-built loudspeaker offering a significant upgrade in sound quality. Trickle-down technology gives a taste of Bowers & Wilkins' flagship series at a more affordable price.

Video review

Our take on the brand

Bowers & Wilkins pioneered the use of Kevlar fibers in speaker cones and developed the Matrix cabinet design, which significantly reduces cabinet resonance and sound coloration. Their Nautilus speaker, introduced in 1993, features the distinctive Nautilus tube tweeter design that minimizes sound resonance, while their dedicated Steyning Research facility has produced breakthroughs like the Continuum cone for improved audio transparency.
Julian Shapiro
ExtremeHiFi Writer
Visit our
702 S3
page
Product Page
LS60 Wireless Lotus Edition
6599
6599
/
9
Reviews
KEF
KEF's signature Uni-Q technology places the tweeter in the center of the woofer to create a single point source for sound, while their Metamaterial Absorption Technology absorbs 99% of unwanted sound from the rear of the driver. Their Music Integrity Engine corrects timing errors in the speaker crossover, and their Shadow Flare technology reduces diffraction for improved detail and clarity in sound reproduction.
Check on Amazon
Expand Details

Our Summary

Product Strengths

  • Excellent sound quality, with reviews noting neutral and balanced sound, meticulous detail retrieval, and delicate micro-dynamics
  • Good imaging and soundstage, with the ability to create a wide and immersive soundstage with precise imaging
  • Sleek design, with their elegance and ability to complement modern interiors
  • Powerful and well-controlled bass, thanks to the Uni-Core driver technology
  • Wide array of connectivity options, including HDMI eARC, optical, coaxial, RCA, Ethernet, Wi-Fi, AirPlay 2, Google Chromecast, Spotify Connect, Tidal Connect, Amazon Music, Deezer, and Qobuz

Product Considerations

  • Relatively expensive compared to other active speaker systems
  • Some reviewers noted occasional signal dropouts between the primary and secondary speakers when connected wirelessly
  • The KEF Connect app is essential for full functionality and optimal setup, which may not appeal to users who prefer physical controls
  • Bass output can be sensitive to room placement and may require adjustments to avoid boominess
  • Connecting multiple external devices can result in significant cable clutter, despite being marketed as wireless

Comparisons (according to reviewers)

  • Vs Bang & Olufsen Beolab 28: The LS60 offers comparable performance at roughly half the price, though the Beolab 28 is noted as sounding better out-of-the-box without EQ
  • Vs KEF LS50 Wireless II: The LS60 offers improved performance and near full-range playback, but at a higher price, the LS50 Wireless II offers similar clarity with a slightly warmer sound
  • Vs Klipsch Forte 4: The LS60 is more suited for home theater use and surface more detail
  • Vs Q Acoustics Q Active 400 Towers, Dali Oberon 7C Wireless, and Bowers & Wilkins Formation Duos: The LS60 is considered a better, more refined and adjustable package
  • Vs Hegel H190 & KEF LS50 Meta with KEF KC-62 Subwoofer: The LS60 communicates the forward force of music better and has features such as Tidal Connect and room EQ
  • Vs Lindemann TD-AI1120, KEF LS50 Meta & KEF KC-62 Subwoofer: The LS60 cannot be matched in scale and effortless dynamics

Takeaway: The KEF LS60 Wireless is a fantastic, all-in-one speaker system that sounds great and looks stylish. They are easy to set up and use, and will fill a room with music for years to come.

Video review

Our take on the brand

KEF's signature Uni-Q technology places the tweeter in the center of the woofer to create a single point source for sound, while their Metamaterial Absorption Technology absorbs 99% of unwanted sound from the rear of the driver. Their Music Integrity Engine corrects timing errors in the speaker crossover, and their Shadow Flare technology reduces diffraction for improved detail and clarity in sound reproduction.
Julian Shapiro
ExtremeHiFi Writer
Visit our
LS60 Wireless Lotus Edition
page
Product Page

What else competes at this price?

T66
3450
/
Released
2024
GoldenEar
The T66 is the first model in GoldenEar's new T Series. While it boasts several significant refinements of our time-tested design concepts, the T66 is undeniably a GoldenEar loudspeaker, placing beautiful sound and music before all else.
Check on Amazon
GoldenEar Technology stands out for its High-Velocity Folded Ribbon tweeter, which moves air like an accordion to avoid the distortion common in metal dome tweeters, and its built-in powered bass sections with DSP eliminate the need for separate subwoofers. The brand delivers high-end sound quality at more accessible price points through its Triton series, which uses passive radiators to achieve powerful bass from compact cabinets.
Expand Details

Our Summary

Product Strengths

  • Excellent bass performance is a defining feature, providing tight, smooth, even, solid, and tangible bass extension into the 20 Hz range, eliminating placement issues associated with separate subwoofers
  • Balanced overall sound, coherence, and ability to present music in a natural and effortless way is consistently praised
  • High levels of detail come through with the High-Velocity Folded Ribbon AMT tweeter and cast-basket mid/bass units
  • A holographic image over the seating area of a typical sofa is capable with excellent imaging and a wide and open soundstage, even when not seated in the exact sweet spot
  • The Santa Barbara Red finish option receives high marks for its visual appeal

Product Considerations

  • Still a significant investment, especially the Santa Barbara Red finish
  • The metal grille covering the drivers is not designed to be easily removed
  • Care should be taken with system matching, due to a slightly hot high-end

Comparisons (according to reviewers)

  • The T66 offers more refinement and a more 'of-a-piece' sound than the Triton One.R
  • Has internal structural improvements that make it even more stable and rigid than previous generations

Takeaway: The GoldenEar T66 delivers audiophile-grade sound and aesthetics, with powerful bass and exceptional detail. These speakers are easy to incorporate into nearly any environment, and have the power to let the listener appreciate all the nuances in favorite songs or movies.

Video review

Our take on the brand

GoldenEar Technology stands out for its High-Velocity Folded Ribbon tweeter, which moves air like an accordion to avoid the distortion common in metal dome tweeters, and its built-in powered bass sections with DSP eliminate the need for separate subwoofers. The brand delivers high-end sound quality at more accessible price points through its Triton series, which uses passive radiators to achieve powerful bass from compact cabinets.
Julian Shapiro
ExtremeHiFi Writer
Visit
T66
Page
Product Page
Lumina V
2999
/
Released
2021
Sonus Faber
Lumina V is the flagship three-way floor standing model in the collection. A slender speaker with high-power handling and fast transient response, Lumina V produces a natural, generous, and emotional sound for an immersive listening experience.
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Sonus Faber is an Italian hifi brand that designs speakers with unique lute-shaped cabinets inspired by traditional violin-making, featuring wood and leather materials to achieve a natural sound. Their speakers incorporate distinctive elements like cork chambers for midrange drivers and asymmetrical driver baskets that mimic natural forms, with each unit being individually tuned by ear to ensure tonal perfection.
Expand Details

Our Summary

Product Strengths

  • Elegant design with a combination of wood and leather that gives a classy appearance
  • Impressive bass output, with some reviewers noting deep and tuneful bass
  • The midrange is articulate and expressive, delivering vocals with palpability and detail
  • Smooth and detailed high-end reproduction, thanks to the Damped Apex Dome (DAD) tweeter
  • Relatively easy to drive with a sensitivity of 89-90dB

Product Considerations

  • Requires careful placement to achieve the best balance, especially regarding toe-in
  • The bass can sometimes be perceived as boomy depending on the room acoustics
  • Some reviewers mention the included binding posts are cheap

Comparisons (according to reviewers)

  • Compared to the Q Acoustics Concept 50, the Lumina V has a more live sound, but the Concept 50 is more neutral, and more inert
  • Compared to the Polk R700, the Lumina V is sonically similar to the R700, but with slightly less bass and a smaller cabinet—with better aesthetics; the R700 is more full range and warmer
  • Compared to the Spendor A4 or ProAc Response DT8, the Lumina V is not as precise, but offers a natural sonic grace

Takeaway: The Sonus Faber Lumina V is an elegant speaker that delivers detailed sound and impressive bass. It is a great option if you want speakers that look as good as they sound.

Video review

Our take on the brand

Sonus Faber is an Italian hifi brand that designs speakers with unique lute-shaped cabinets inspired by traditional violin-making, featuring wood and leather materials to achieve a natural sound. Their speakers incorporate distinctive elements like cork chambers for midrange drivers and asymmetrical driver baskets that mimic natural forms, with each unit being individually tuned by ear to ensure tonal perfection.
Julian Shapiro
ExtremeHiFi Writer
Visit
Lumina V
Page
Product Page
R7t
4995
/
Released
2022
Perlisten
You wanted a flagship R-Series to fill larger rooms based on the trickle-down technology from the S-Series. The second-best two-channel system in our line-up still rivals most competitor's flagship. Employing the same DPC array and long-excursion woofers for extremely low distortion and our beam forming controlled directivity down to 500Hz make this a full-range masterpiece only rivaled by our own award-winning S7t.
Check on Amazon
Perlisten Audio's speakers feature a unique Directivity Pattern Control array that combines a beryllium tweeter with thin-ply carbon diaphragm midrange drivers to control sound dispersion and enhance imaging precision, and they're the first brand to achieve THX Dominus certification. Their speakers use proprietary thin-ply carbon diaphragm material that's 30% lighter than standard carbon fiber, with their DPC array designed to minimize floor and ceiling reflections while maintaining precise horizontal soundstage.
Expand Details

Our Summary

Product Strengths

  • Remarkably coherent and balanced sound profile, resulting from well-engineered and matched drivers and cabinet
  • An uncanny ability to 'disappear' in the listening room
  • The DPC array design contributes to a wide horizontal dispersion, allowing a broader sweet spot for multiple listeners
  • Accurate sound reproduction and neutral enough for studio use
  • A high level of dynamic ability, good low-end control, and a cavernous soundstage

Product Considerations

  • Only available in gloss black and gloss white finishes, which might not suit all tastes or home décor
  • The price point is a significant investment, placing it beyond the reach of many
  • Some reviewers noted a mild treble roll-off, or smooth character that was overly kind on poor recordings and might lack the sparkle and excitement some listeners prefer
  • Setting up requires assistance, due to the weight
  • The lower bass extension may not satisfy deep bass enthusiasts, with extension starting to drop below 40Hz

Comparisons (according to reviewers)

  • Compared to the Perlisten S7t, the S7t offers more overall weight, bottom-end reach, resolution, and dynamic speed, but the R7t shines brightly on its own
  • Compared to the EgglestonWorks Oso, the Oso presented a more muscular version of the music with more bottom end oomph, while the R7t conveyed music's finer points with more apparent resolution
  • Compared to the KEF Reference 3, the KEF may yield deeper bass extension due to greater cabinet volume, and the scale of the soundstage may also be improved, but the Perlisten offers a superior disappearing act

Takeaway: The Perlisten R7t are well-built speakers that provide a detailed and immersive listening experience, with their advanced design and unique driver array creating a spacious soundstage. Their cutting-edge design creates a great listening experience.

Video review

Our take on the brand

Perlisten Audio's speakers feature a unique Directivity Pattern Control array that combines a beryllium tweeter with thin-ply carbon diaphragm midrange drivers to control sound dispersion and enhance imaging precision, and they're the first brand to achieve THX Dominus certification. Their speakers use proprietary thin-ply carbon diaphragm material that's 30% lighter than standard carbon fiber, with their DPC array designed to minimize floor and ceiling reflections while maintaining precise horizontal soundstage.
Julian Shapiro
ExtremeHiFi Writer
Visit
R7t
Page
Product Page
Esprit 40th - Antal 40th
4000
/
Released
2023
Triangle
Antal and Comète are two emblematic models of the brand. They reflect the philosophy of the company: making sound accessible to the widest variety of customers possible through simple processes designed to foster emotion. The Antal 40th floorstander features a new rose gold anodized magnesium dome tweeter, offering high efficiency and controlled distortion.
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Triangle is a French speaker manufacturer known for its bright, lively sound and distinctive tweeter designs that use horn-loaded tweeters to enhance high-frequency detail.
Expand Details

Our Summary

Product Strengths

  • Excellent midrange imaging and naturalness, described as smooth and stunning
  • Smooth treble with a timbre and natural decay that allows for hours of listening without fatigue
  • Expansive soundstaging with good imaging, height, and depth
  • Stellar overall balance makes it an outstanding performer
  • Beautiful wood veneer with high polish lacquer and attention to detail in construction

Product Considerations

  • Bass will not reach subterranean levels, a subwoofer may be required for strong bass enthusiasts
  • Speakers may benefit from more power
  • "Messy music" (genres with rawness or grime) may not be conveyed as well, as the speaker can be a little polite
  • Excellent clarity was brilliantly showcased by Ray Gelato's Basin Street Blues, beautifully recorded on the Linn label, which may not appeal to all audiences

Comparisons (according to reviewers)

  • Compared to the standard Antal Ez, the 40th Anniversary edition uses a lighter—more rigid anodized-magnesium tweeter for higher efficiency, lower distortion, and better directivity

Takeaway: The Triangle Antal 40th Anniversary is a well-balanced and beautiful loudspeaker with a stunning midrange that provides a musical and engaging listening experience. Its clarity, expansive soundstage, and beautiful design make it a great addition to any audiophile's setup

Video review

Our take on the brand

Triangle is a French speaker manufacturer known for its bright, lively sound and distinctive tweeter designs that use horn-loaded tweeters to enhance high-frequency detail.
Julian Shapiro
ExtremeHiFi Writer
Visit
Esprit 40th - Antal 40th
Page
Product Page
AE320
2899
/
Released
2021
Acoustic Energy
The AE320 is a new slim-line floor-standing loudspeaker with compact dimensions, suitable for medium to large sized rooms.
Check on Amazon
Acoustic Energy is a hifi speaker brand known for its unique 3.5-way Corinium design that separates bass drivers from midrange and tweeter, creating sound similar to a standmount speaker with a bass module. Their speakers feature distinctive materials like coconut husk-paper blend drivers and carbon fiber domes, along with specialized cabinet designs using inert mass damping to reduce coloration and enhance clarity.
Expand Details

Our Summary

Product Strengths

  • Deep, strong, and powerful bass conveys music on a scale that may not be expected
  • Excellent musical communicator with a relatively clean and open midband, and a surprisingly polished treble for its price
  • Well-rounded sound with perfect tonal balance and the ability to create perfectly stable and three-dimensional sound sources with great tonal differentiation
  • Delivers on quality while being easy to drive from even moderately powered amps due to its impressive sensitivity

Product Considerations

  • May require a medium to large room to avoid overpowering smaller environments
  • The snappy character of the ceramic/aluminum drivers needs sympathetic amp matching, as it is best not partnered with a brighter-balanced transistor amplifier
  • There is some cabinet coloration

Comparisons (according to reviewers)

  • Vs Bowers & Wilkins' 603 S2 Anniversary Edition, B&W is a more 'grown-up' sounding speaker in that it's more discreet, controlled, measured, and refined

Takeaway: The AE320 is a well-designed and well-made speaker that sounds warm, open, and cohesive across the frequency range. It offers great value for its price and is ideal for those looking for a floorstanding speaker with excellent detail and impact.

Video review

Our take on the brand

Acoustic Energy is a hifi speaker brand known for its unique 3.5-way Corinium design that separates bass drivers from midrange and tweeter, creating sound similar to a standmount speaker with a bass module. Their speakers feature distinctive materials like coconut husk-paper blend drivers and carbon fiber domes, along with specialized cabinet designs using inert mass damping to reduce coloration and enhance clarity.
Julian Shapiro
ExtremeHiFi Writer
Visit
AE320
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

  • Very superior coherence through the critical crossover and presence regions
  • Warm, lively, and essentially neutral sound, with superior musical communication skills
  • Precise and tightly focused imaging, capable of delivering decent depth and ambience

Product Considerations

  • Genuinely deep bass is somewhat restricted
  • Bass could be a bit punchier

Comparisons (according to reviewers)

  • Vs Amphion Prio—Helium 520 has all the good qualities shown by the Prio, most notably its very superior coherence
  • Vs Amphion Prio—Helium 520 does so with improved smoothness right across the band, including the previously slightly troublesome bass alignment compared to the Prio

Takeaway: The Amphion Helium 520 is an exceptional speaker with a rare combination of warmth, neutrality, coherence and fine imaging. It offers excellent value, making it hard to find a better option in its price range.

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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