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

  • Extensive range of functionality effectively puts the ADL GT40a in a class of its own, offering phono stage, DAC, and headphone amp capabilities in a small footprint
  • A smooth and natural sound while avoiding sounding rounded off, delivering plenty of punch, detail, and texture
  • Phono stage performance is a surprise, with high gain, quiet operation, and warmer—more involving sound compared to its digital performance
  • Casework is all metal and extremely well finished with a level of integrity that isn't often found

Product Considerations

  • Can only really do one thing at once, as using it as a phono stage precludes switching it straight over to use as a USB DAC
  • A slight lack of warmth in the midrange means that when listening to something delicate, the GT40a can sound very slightly sterile
  • Lacks DSD support

Takeaway: The GT40a is a versatile device, packing a DAC, headphone amp, and phono stage into one well-built unit. It's a good option if multiple audio functions are needed in a single device.

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.

ADL A1  

  • Positioning: A high-resolution portable headphone amplifier and DAC focused on mobility.  
  • Description: Offers a streamlined design tailored mainly for Android use with high-resolution audio playback. Shares core technology with the X1 but is optimized for portability and cost efficiency, making it suitable for users with small setups and tight budgets.

ADL X1  

  • Positioning: A compact and versatile portable DAC/headphone amplifier with broad connectivity.  
  • Description: Integrates a high-performance DAC chip with support for both digital and analog sources, ensuring flexibility across iOS devices and PCs. In comparison to the A1, its expanded input options and robust battery capability position it as a mid-range option for users needing more connectivity.

ADL Stride  

  • Positioning: An affordable portable amplifier designed to balance performance with simplicity.  
  • Description: Delivers clear and efficient amplification using a simplified circuitry that maintains solid sound quality for portable use. Relative to the Cruise, it offers similar basic functionality while keeping costs lower.

ADL Cruise  

  • Positioning: A premium portable amplifier that combines advanced DAC performance with refined build quality.  
  • Description: Uses a top-tier digital-to-analog conversion system and enhanced internal circuitry to deliver detailed sound and robust output. Compared to the Stride, its superior power output and additional technological refinements justify the higher cost.
See all the brand's products

Read the reviews

[{"title":"Alpha Design Labs GT40a DAC & Headphone Amp Review","link":"https://www.avforums.com/reviews/alpha-design-labs-gt40a-dac-headphone-amp-review.12335","source":"AVForums","datePublished":""}]
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

The GT40α built for enthusiasts with growing music collections on their computer hard drives. It's a high performance 24bits/192kHz USB DAC that's amazingly affordable. Looking to convert your LPs or other analog sources to digital? The GT40α will take you to the podium with every album you archive. The seriously-shielded audiophile-grade GT40α features a low-latency USB 2.0 audio driver that plays and records at 24bits/192kHz. A likely first for this category, the GT40α includes a built-in low-noise MM / MC phono preamp!
  • USB Playback Resolution: 24bits/192kHz (Max)
  • USB Recording Resolution: 24bits/192kHz (Max)
  • Frequency response: 20Hz ~ 20kHz (+/-0.5 dB)
  • SN ratio: >90dB (A-wtd)
  • Line Output Level: 5 Vrms
  • Line Input Level: MC 0.4mV / MM 4.0mV / Line 2Vrms
  • Headphone Output Level: 94mW(16 ohm),110mW(32 ohm), 98.6mW (56 ohm), 23mW (300 ohm)
  • Power Supply: DC 15V / 0.8A / 12W
  • Dimensions: 150 (W) x 111 (D) x 57 (H) mm
  • Weight: 650g
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Average Price
$501-$1,000
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Our take on the brand

ADL is a hifi brand that sets itself apart through unique engineering choices like Furutech-designed diaphragms, cryo-treated magnets, and PEEK trembler film in their headphones.
Julian Shapiro
ExtremeHiFi
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Alpha Design Labs

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What if you spend a bit more?

iDSD Diablo 2
1299
1299
/
25
Reviews
iFi
iFi Audio specializes in portable hifi audio players, offering compact DACs and headphone amplifiers for audiophiles seeking quality sound on the go. The brand also provides affordable audiophile gear, making quality hifi audio accessible to more people.
Check on Amazon
Expand Details

Our Summary

Product Strengths

  • Delivers a vividly detailed and balanced sound, handling complicated mixes with skill
  • Able to extract a lot of information from digital audio files with apparent ease
  • A volume lock prevents accidental volume adjustments when the device is in a pocket or bag
  • Extensive specification including Bluetooth 5.4 with aptX Lossless compatibility and multiple inputs/outputs for versatile connectivity

Product Considerations

  • Some reviewers feel the device is not very pocket-friendly due to its size and sharp edges, making it better suited as a transportable—rather than a truly portable—device
  • The gain is set too high, making precise volume control difficult, especially with sensitive IEMs
  • Using IEMatch adds output impedance, which can negatively affect the tonal balance and dynamics of some IEMs
  • The length of the included USB-C cable is short, making it difficult to position the device on a desk

Comparisons (according to reviewers)

  • Compared to the iDSD Diablo 1, the Diablo 2 offers slight sonic improvements and better build quality, but at a higher price
  • Compared to the iDSD Signature, the iDSD Signature is considered by some to offer a better result for less money, with a more realistic instrument and vocal timbre, larger soundstage, and customizable features like crossfeed and bass boost
  • Compared to the FiiO Q7, the iDSD Diablo 2 has a vivid sound, where the FiiO Q7 has a smooth and wide sound

Takeaway: The iDSD Diablo 2 is a powerful and versatile DAC/amp that enhances headphone listening with its detailed sound and extensive features. It is a good choice for users who want a high-quality audio experience on the go or at their desk.

Video review

Our take on the brand

iFi Audio specializes in portable hifi audio players, offering compact DACs and headphone amplifiers for audiophiles seeking quality sound on the go. The brand also provides affordable audiophile gear, making quality hifi audio accessible to more people.
Julian Shapiro
ExtremeHiFi Writer
Visit our
iDSD Diablo 2
page
Product Page
Anni
1680
1680
/
21
Reviews
Chord Electronics

Anni is our first-ever desktop integrated amplifier. Capable of driving both headphones and compact loudspeakers, Anni benefits from the company's proprietary ULTIMA circuit topology and is perfectly positioned to exploit the full potential of today's high-performance headphones, desktop monitors and high-resolution audio sources.

The new Anni desktop integrated amplifier forms part of the Qutest range and seamlessly complements the resolving abilities of the multi-award-winning Qutest standalone DAC and Huei phono stage. As a system, the Qutest components provide an unrivalled desktop audio solution, offering class-leading digital and analogue technologies for the modern music lover. The company's compact QSS (Qutest Stand System) modular equipment rack provides the perfect support, too.

Anni offers the recently announced dual-feed-forward error-correction circuit topology whether using headphones or compact loudspeakers. Anni's advanced technology allows it to drive any headphone load, error-monitored and compensated amplification at all times.

Benefitting from both 3.5 mm headphone outputs and ¼-inch (6.35 mm) outputs, so two can listen simultaneously, plus 4 mm banana-type loudspeaker outputs, Anni delivers 10 watts of quality ULTIMA amplification, controlled by a fascia-mounted volume control that also doubles as an input selector switch for Anni's two line-level inputs. A two-stage gain control for loudspeakers provides additional flexibility with a wide range of desktop monitors.

Chord Electronics designs and manufactures all their products in Great Britain, setting themselves apart by using proprietary FPGA technology instead of off-the-shelf DAC chips found in most competitors' products. Their DACs and portable audio devices, featuring distinctive color-changing buttons and portholes, deliver studio-grade performance through unique technologies like the Watts Transient Aligned filter, which provides more natural and detailed sound reproduction.
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Our Summary

Product Strengths

  • Joyful sound signature with detailed output
  • Can power a wide range of headphones, due to Ultima technology
  • Compact design, stacks perfectly with the Qutest and Huei
  • Employs trickle-down Ultima technology to allow delivery of enormous peak current outputs
  • Solid build quality using CNC-milled aluminum casework and good heat dissipation
  • Connectivity options include headphone and speaker outputs

Product Considerations

  • No gain switch for the headphone output
  • Default gain level a bit high for sensitive IEMs
  • More power limitations with speakers than headphones—best for smaller, efficient speakers or nearfield listening
  • Runs hot, requiring good ventilation
  • The volume control feels a little wobbly and might be difficult to use in a very precise way, and there is some channel imbalance at very low volumes

Comparisons (according to reviewers)

  • Qutest/Anni pairing justifies its price premium thanks to a more composed and insightful presentation that offers notably more low-end authority, dynamic punch and tonal richness
  • Cyrus ONE HD is plusher, showing that Anni has strong niche appeal
  • The iFi xDSD Gryphon has digital inputs and built-in DAC, while Anni can power speakers

Takeaway: The Chord Electronics Anni is a compact and well-built amplifier that delivers a joyful and detailed sound, making it a great addition to a desktop setup for headphone and nearfield speaker listening. Its use of trickle-down Ultima technology ensures high-quality performance in a small package, and its ability to stack with other Chord devices makes it a good choice for those already invested in the ecosystem.

Video review

Our take on the brand

Chord Electronics designs and manufactures all their products in Great Britain, setting themselves apart by using proprietary FPGA technology instead of off-the-shelf DAC chips found in most competitors' products. Their DACs and portable audio devices, featuring distinctive color-changing buttons and portholes, deliver studio-grade performance through unique technologies like the Watts Transient Aligned filter, which provides more natural and detailed sound reproduction.
Julian Shapiro
ExtremeHiFi Writer
Visit our
Anni
page
Product Page
Model 40n
2499
2499
/
20
Reviews
Marantz
Marantz is a hifi brand known for its proprietary HDAM technology, which replaces traditional op-amps in their amplifiers for better sound quality. Their products include slim-design AVRs that fit better under TVs, and their flagship Model 10 Reference Integrated Amplifier delivers exceptional power with 250 watts into 8 ohms through its dual-mono symmetrical amplifier topology.
Check on Amazon
Expand Details

Our Summary

Product Strengths

  • High-quality build and aesthetics, with a metal casing and elegant fascia made to a high standard
  • A clear, powerful, and spacious sound, with a presentation that is appealing right from the beginning
  • Plenty of power on tap, specified at 70W per channel into 8 ohms and 100W per channel into 4 ohms
  • Fantastic connectivity, with three pairs of line-level inputs, an MM phono stage, and outputs for a recorder and subwoofer
  • Capable network DAC/streamer with digital controls

Product Considerations

  • The dimpled effect flanking the extruded front panel gives the unit a further distinctive look, but the finish feels like plastic upon closer inspection
  • The HEOS app isn't bespoke to the 40n, many of the product's set-up options can only be accessed through the unit using the included remote control
  • Bluetooth pairing took longer than expected, and there were occasions when the app stopped being able to see or display the music server when switching inputs
  • The lettering on the remote control is impossible to read in dim light, and the buttons are too similar in size, resulting in fumbling in the dark

Comparisons (according to reviewers)

  • The Marantz Model 40n is a different proposition compared to the Marantz PM7000N, Marantz is keen to reposition itself as a luxury hifi brand and that intent is clear in the 40n's gorgeous build and aesthetics
  • Rival systems such as the Cambridge Audio Evo 150 and Naim Uniti Atom do a better job of engrossing listeners in the music, being more insightful, musically engaging, and dynamically exciting by degrees
  • Is super-sexy and distinctive styling, a higher level of fit and finish, a much better remote, and access to Sound United's HEOS streaming/multiroom audio platform wanted—or more coaxial and optical digital inputs, Dirac Live room-correction capabilities, more power, a more efficient topology, and access to Lenbrook's BluOS streaming/multiroom audio platform
  • At first glance it's hard to distinguish the Model 40n from its slightly costlier Marantz Model 30 sibling

Takeaway: The Marantz Model 40n is a stylish and feature-packed streaming amplifier that offers a musical and inviting performance. With its versatile connectivity options and impressive sound quality, the Model 40n is a great choice for modern, lifestyle hifi systems.

Video review

Our take on the brand

Marantz is a hifi brand known for its proprietary HDAM technology, which replaces traditional op-amps in their amplifiers for better sound quality. Their products include slim-design AVRs that fit better under TVs, and their flagship Model 10 Reference Integrated Amplifier delivers exceptional power with 250 watts into 8 ohms through its dual-mono symmetrical amplifier topology.
Julian Shapiro
ExtremeHiFi Writer
Visit our
Model 40n
page
Product Page
Omnia
1049
1049
/
17
Reviews
Audiolab
Audiolab is a hifi brand known for its unique streaming platform from Pixel Magic, which enables over-the-air updates and wide audio format compatibility including DSD. Their amplifiers and components feature distinctive capabilities like HDMI ARC inputs, user-selectable digital filters for sound customization, and advanced filtering technology in their pre/power amps.
Check on Amazon
Expand Details

Our Summary

Product Strengths

  • Offers a comprehensive set of features including CD player, streamer, Bluetooth, headphone amplifier, phono amplifier, and power amplifier, all in one box
  • Sounds very good across digital and analogue inputs, the combination of digital decoding and amplification is exceptionally cohesive
  • Has a sturdy, well-built casework that feels every inch of its price tag, and is built to last
  • Provides clear, detailed and large, spacious sound with an easy-going presentation, and can be part of an expansive wireless multi-room system
  • Incorporates a high-quality ESS Sabre DAC and amplifier based on the Audiolab 6000A design

Product Considerations

  • The software interface using DTS Play-Fi is a little slow, and Play-Fi is still not gapless, Play-Fi is not delivering at the same level of user experience as competitor solutions
  • Rivals have greater dynamic punch, rhythmic accuracy, and energy
  • Some reviewers find that the unit can be a bit sensitive with scratched CDs
  • Remote and fascia controls aren't all that responsive
  • There is no album art displayed on the screen during streaming

Comparisons (according to reviewers)

  • Compared to the Technics SA-C600, the Technics may not be as big-scaled, open or reveal as much detail as the Audiolab Omnia, but it's more adept at conveying enthusiasm, rhythmic precision and dynamic punch
  • In direct competition with the Cambridge Audio Evo 75, the Audiolab Omnia ties Audiolab styling touches into something that is not slavishly retro and gives away absolutely nothing in terms of feel, solidarity and design
  • Compared to the NAD C700, the Audiolab Omnia has functionality they cannot get anywhere near—indeed functionality that leaves everything else under two grand looking rather limited

Takeaway: The Audiolab Omnia is a versatile and well-built all-in-one system that offers a wide range of features and delivers enjoyable sound, making it a great option for those seeking convenience without sacrificing audio quality. It's especially appealing for those who still value CD playback.

Video review

Our take on the brand

Audiolab is a hifi brand known for its unique streaming platform from Pixel Magic, which enables over-the-air updates and wide audio format compatibility including DSD. Their amplifiers and components feature distinctive capabilities like HDMI ARC inputs, user-selectable digital filters for sound customization, and advanced filtering technology in their pre/power amps.
Julian Shapiro
ExtremeHiFi Writer
Visit our
Omnia
page
Product Page

What else competes at this price?

Mojo 2
650
/
Released
2022
Chord Electronics
The British designed and built Mojo 2 is the most advanced portable DAC and headphone amplifier in the world today. Winner of Best DAC (£300-£500) in the What Hi-Fi? Awards 2022, the Mojo 2 is entirely engineered around a powerful, custom-coded FPGA processor and benefits from several unique technologies.
Check on Amazon
Chord Electronics designs and manufactures all their products in Great Britain, setting themselves apart by using proprietary FPGA technology instead of off-the-shelf DAC chips found in most competitors' products. Their DACs and portable audio devices, featuring distinctive color-changing buttons and portholes, deliver studio-grade performance through unique technologies like the Watts Transient Aligned filter, which provides more natural and detailed sound reproduction.
Expand Details

Our Summary

Product Strengths

  • Improved battery management offering faster charging rates and better efficiency than its predecessor
  • Features a new USB-C data input for greater flexibility alongside other inputs
  • Offers the world's first lossless DSP for tone adjustments without degrading sound quality, providing customization options
  • Excellent resolution and dynamics with a large soundstage and extreme detail

Product Considerations

  • The Mojo 2 can get warm when in a pocket for a period of time
  • Complicated menu navigation with color-coded buttons that may require the manual
  • Still uses Micro-USB for charging, which some find outdated

Takeaway: The Chord Mojo 2 is an exceptional DAC/headphone amplifier for those seeking high-resolution audio and customized sound in a portable format that is easy to move. Its sonic accuracy, detailed soundstage, and improved features provide a versatile and enjoyable listening experience, making it a worthwhile consideration for audio enthusiasts.

Video review

Our take on the brand

Chord Electronics designs and manufactures all their products in Great Britain, setting themselves apart by using proprietary FPGA technology instead of off-the-shelf DAC chips found in most competitors' products. Their DACs and portable audio devices, featuring distinctive color-changing buttons and portholes, deliver studio-grade performance through unique technologies like the Watts Transient Aligned filter, which provides more natural and detailed sound reproduction.
Julian Shapiro
ExtremeHiFi Writer
Visit
Mojo 2
Page
Product Page
xDSD Gryphon
599
/
Released
2021
iFi
On the desk or in your pocket, be ready for anything. Packed with award-winning features and functionality, the xDSD Gryphon takes the best tech from our desktop DACs to create a portable DAC/Amp that can rise to any challenge.
Check on Amazon
iFi Audio specializes in portable hifi audio players, offering compact DACs and headphone amplifiers for audiophiles seeking quality sound on the go. The brand also provides affordable audiophile gear, making quality hifi audio accessible to more people.
Expand Details

Our Summary

Product Strengths

  • Versatile connectivity with both wireless (Bluetooth 5.1 with various codecs) and wired options (USB, S/PDIF, analog inputs) makes it suitable for various setups—from desktop to portable usage
  • Eloquent, informative, and entertaining sound quality, able to produce clear, non-artificial sound across different headphones
  • Features such as XBass II and XSpace provide additional sound shaping options for the user to customize the sound to their liking
  • The aluminum build provides a robust and premium feel, with a design that's described as sleek and comfortable to handle

Product Considerations

  • The user interface is not very intuitive
  • Decent headphones are needed to reveal its quality
  • The OLED screen can be difficult to read
  • Battery life is around six to eight hours

Comparisons (according to reviewers)

  • Compared to the hip-dac2, the Gryphon offers better sound quality, more features, and flexibility
  • Compared to the iFi GO bar, the Gryphon is bigger and has a built-in battery, and the GO bar is much smaller and draws power from the source device
  • Compared to the iDSD Diablo, the Diablo has more power for very demanding headphones, Gryphon has more functions
  • Compared to the Zen DAC, the xDSD Gryphon has a more sophisticated and detailed sound

Takeaway: The iFi xDSD Gryphon is a portable and versatile device delivering high-quality sound with extensive features that cater to audiophiles. Its ability to improve sound quality from various sources and its robust build make it a worthwhile investment for music lovers on the go.

Video review

Our take on the brand

iFi Audio specializes in portable hifi audio players, offering compact DACs and headphone amplifiers for audiophiles seeking quality sound on the go. The brand also provides affordable audiophile gear, making quality hifi audio accessible to more people.
Julian Shapiro
ExtremeHiFi Writer
Visit
xDSD Gryphon
Page
Product Page
Powernode
949
/
Released
2021
Bluesound
The Bluesound POWERNODE is the HiFi amp reinvented for the streaming age, combining audiophile-grade componentry and multi-room music capabilities to create an intuitive "just add speakers" hi-res sound system for modern music lovers.
Check on Amazon
Bluesound is one of the best entry-level amps if you're looking to dip your toes into hifi. Reviewers love it for what it offers at the price—solid dynamics and tight bass, which is exactly what you expect from good Class D. It’s the go-to pick for people new to hifi since it gives you about 75% of the high-end experience without needing a ton of power. It’s perfect for smaller setups where you want good sound without going all-in on expensive gear.
Expand Details

Our Summary

Product Strengths

  • Punchy and musical performer
  • BluOS is a treat to operate
  • Convenient design as a source and amplifier in one, only needing speakers to complete the system
  • Engagingly musical performer—dynamically fluid and punchy, with plenty of energy
  • More neutral sounding now, making gains in clarity and insight across the frequency range
  • Connectivity options are through 3.5mm headphone-type connectors, shared with mini-TosLink connections

Product Considerations

  • Tough competition from other streaming amplifiers
  • No way to send data out to an external DAC
  • The Powernode was occasionally hard on transients and dynamic bursts
  • There is no included remote

Comparisons (according to reviewers)

  • The Marantz has a wider-scale, roomier soundstage and greater subtlety

Takeaway: The Bluesound Powernode is a superb streaming amplifier that is better than ever, offering excellent sonic talent and a well-rounded feature set. It provides a convenient and high-quality music experience for anyone looking to simplify their home audio setup.

Video review

Our take on the brand

Bluesound is one of the best entry-level amps if you're looking to dip your toes into hifi. Reviewers love it for what it offers at the price—solid dynamics and tight bass, which is exactly what you expect from good Class D. It’s the go-to pick for people new to hifi since it gives you about 75% of the high-end experience without needing a ton of power. It’s perfect for smaller setups where you want good sound without going all-in on expensive gear.
Julian Shapiro
ExtremeHiFi Writer
Visit
Powernode
Page
Product Page
Powernode Edge
549
/
Released
2022
Bluesound
Find a little extra power with the POWERNODE EDGE, the perfect entry point into "just add speakers" HiFi for the streaming age, combining streaming sources, control, and amplification all in one place. Audiophile-grade componentry capable of up to 24 bits/192 kHz hi-res audio, and wireless multi-room capabilities with smartphone controls combine to make the POWERNODE EDGE a great 'building block' amplifier to start, extend or complete a hi-res streaming audio system of any size.
Check on Amazon
Bluesound is one of the best entry-level amps if you're looking to dip your toes into hifi. Reviewers love it for what it offers at the price—solid dynamics and tight bass, which is exactly what you expect from good Class D. It’s the go-to pick for people new to hifi since it gives you about 75% of the high-end experience without needing a ton of power. It’s perfect for smaller setups where you want good sound without going all-in on expensive gear.
Expand Details

Our Summary

Product Strengths

  • Compact design makes it easy to fit in small spaces, like desktops or shelves
  • Extensive streaming capabilities via the BluOS app are included, with support for popular services like Tidal, Spotify, and Amazon Music
  • Produces a clean, clear, and capable sound with good detail
  • Easy to set up and use, making it an accessible entry point for those new to hifi audio streaming
  • A variety of connectivity options are offered, including HDMI eARC, optical/analog input, USB, and Ethernet

Product Considerations

  • A headphone port is lacking
  • Sound lacks outright nuance, dynamics, and punch compared to some rivals
  • The BluOS app is required for full control, which might be a drawback for some
  • The unit's maximum file resolution support is 24-bit/192kHz PCM, lower than some competitors
  • Performance may be limited by the speakers connected to it

Comparisons (according to reviewers)

  • Vs Bluesound Powernode (2021) — The Edge has halved the power output and lacks a headphone port compared to the Powernode (2021)
  • Vs Technics SA-C600 — The Powernode Edge is not as musically expressive or deft with dynamics as the Technics SA-C600
  • Vs Triangle AIO Twin — The Triangle AIO Twin is more entertaining, and is a complete system—speakers included
  • Vs WiiM Amp — The WiiM Amp offers many features of BluOS and Chromecast

Takeaway: The Powernode Edge is a compact and versatile streaming amplifier that provides a great entry point into high-quality audio streaming for many. Its ease of use and comprehensive feature set make it a solid choice for modern music systems.

Video review

Our take on the brand

Bluesound is one of the best entry-level amps if you're looking to dip your toes into hifi. Reviewers love it for what it offers at the price—solid dynamics and tight bass, which is exactly what you expect from good Class D. It’s the go-to pick for people new to hifi since it gives you about 75% of the high-end experience without needing a ton of power. It’s perfect for smaller setups where you want good sound without going all-in on expensive gear.
Julian Shapiro
ExtremeHiFi Writer
Visit
Powernode Edge
Page
Product Page
S17 Pro
699
/
Released
2023
aune
Check on Amazon
Aune Audio is a hifi brand known for its unique approach to DAC design, using custom-built clock generators and dual DAC chips to achieve exceptional transparency and natural sound. Their products, from the Yuki DAC to the S17 PRO headphone amplifier with its symmetrical Class A design and Twin JFET, deliver a tube-like sound signature that's easy to drive without high-end amplification.
Expand Details

Our Summary

Product Strengths

  • Fully balanced technology, with balanced inputs and outputs.
  • Delivers powerful amplification, with up to 7.5 watts of power, capable of driving a wide range of headphones, including hard-to-drive models.
  • Features a linear power supply with a large transformer and capacitor bank, providing a stable and powerful power source.
  • Provides two current modes (50mA and 100mA) to tailor the sound tonality, allowing users to choose between a more forward/analytical sound and a warmer/fuller sound.
  • Employs an R2R network for volume control, ensuring channel balance even at low volumes.

Product Considerations

  • Runs quite hot due to its Class A amplification, requiring adequate ventilation, with chassis temperatures potentially reaching up to 50 degrees Celsius, and the unit may switch from 100mA to 50mA mode if it overheats.
  • High power output might not be ideal for very sensitive IEMs, potentially limiting volume control flexibility.
  • The preamplifier output is always active, meaning it doesn't mute when headphones are plugged in, requiring caution to prevent damage.
  • The LCD display cannot be dimmed or switched off, and the red color of the 100mA mode may appear washed out.
  • Some report volume slots are not regular or have large jumps, and/or that the remote control can be buggy.

Comparisons (according to reviewers)

  • Vs. Topping A90 Discrete: The S17 has a richer sound, wider soundstage, and easier dynamics, especially in 100mA mode, placing it in a higher tier.
  • Vs. Topping A90D: The S17 Pro is capable of even stronger dynamic swings, with a slightly cleaner and less cluttered soundstage.
  • Vs. Violectric V222: The Aune S17 Pro is more 'tubey' and warmer sounding than the V222.
  • Vs. HIFIMAN EF600: The Aune S17 has better volume control, higher dynamic range, better driving power, and better resolution.

Takeaway: The Aune S17 Pro is a powerful and versatile headphone amplifier that delivers rich, detailed sound, allowing listeners to experience music in new ways. With its balanced design and flexible current modes, it can enhance a wide range of headphones and audio setups.

Video review

Our take on the brand

Aune Audio is a hifi brand known for its unique approach to DAC design, using custom-built clock generators and dual DAC chips to achieve exceptional transparency and natural sound. Their products, from the Yuki DAC to the S17 PRO headphone amplifier with its symmetrical Class A design and Twin JFET, deliver a tube-like sound signature that's easy to drive without high-end amplification.
Julian Shapiro
ExtremeHiFi Writer
Visit
S17 Pro
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

  • Extensive range of functionality effectively puts the ADL GT40a in a class of its own, offering phono stage, DAC, and headphone amp capabilities in a small footprint
  • A smooth and natural sound while avoiding sounding rounded off, delivering plenty of punch, detail, and texture
  • Phono stage performance is a surprise, with high gain, quiet operation, and warmer—more involving sound compared to its digital performance
  • Casework is all metal and extremely well finished with a level of integrity that isn't often found

Product Considerations

  • Can only really do one thing at once, as using it as a phono stage precludes switching it straight over to use as a USB DAC
  • A slight lack of warmth in the midrange means that when listening to something delicate, the GT40a can sound very slightly sterile
  • Lacks DSD support

Takeaway: The GT40a is a versatile device, packing a DAC, headphone amp, and phono stage into one well-built unit. It's a good option if multiple audio functions are needed in a single device.

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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