Website author headshot
Cameron Oatley
ExtremeHiFi
Website author headshot
Julian Shapiro
ExtremeHiFi

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

  • Delivers a neutral and transparent sound signature
  • Packs a lot of power for its size, capable of driving most headphones and IEMs
  • Supports LDAC Bluetooth for high-quality wireless audio
  • Versatile with multiple input and output options, including DAC, preamp, and headphone amp modes
  • Very detailed and resolving sound, especially for its price point

Product Considerations

  • Only has a 3.5mm headphone jack, which may require an adapter for some users
  • Some reviewers found the menu system and setup to be a bit confusing
  • The midrange can sound lean or thin, lacking fullness and body for some listeners
  • Some find it analytical and not as musical or engaging as some alternatives
  • Short power cable

Comparisons (according to reviewers)

  • The DX5 has a richer and fuller midrange with better tone timbre
  • The DX3 Pro Plus is more detailed and has more power than the Fosi Audio DAC-M1
  • The Shanling UA5 has a warmer, fuller, more natural tonality, but the DX3 Pro Plus is faster-paced and more dynamic
  • The DX3 Pro Plus offers improved sonics and a punchier bassline than the original DX3 Pro
  • The SMSL C200 has a warmer, fuller-sounding midrange, but lacks some detail and speed of the DX3 Pro Plus

Takeaway: The DX3 Pro Plus is a compact and powerful all-in-one device that gives a clean, detailed sound and many ways to connect gear. It could be a great choice for a versatile and affordable DAC/amp for a desk.

What are hifi reviews useful for? (1) Identifying products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've heard (this means they probably are legitimately great). (3) Identifying a product's attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we often discount what reviewers say because they heap praise on most products—and are often apprehensive about publishing strong criticism or comparisons between products. Further, they seldom have more than a few products on-hand, often relying on their memories to compare past products. Always listen for yourself.

All

DX3 Pro+

reviews

[{"title":"Topping DX3 Pro+ DAC/Amp Review - A Tiny Powerhouse!","link":"https://www.youtube.com/watch?v=JeiR-0kAk04","source":"GadgetryTech","datePublished":"2024"},{"title":"Is Topping DX3 Pro+ really that good?","link":"https://www.youtube.com/watch?v=VjB8RdpjWK0","source":"iiWi Reviews","datePublished":"2023"},{"title":"Topping DX3 Pro+ Review - Amazing Value For Money Desktop Amp/Dac","link":"https://www.youtube.com/watch?v=TAylU-MTT6o","source":"Vortex Reviews","datePublished":"2023"},{"title":"A HANDY desktop device! TOPPING DX3 Pro+ Review","link":"https://www.youtube.com/watch?v=guFITXYDIRU","source":"Prime Audio Reviews","datePublished":"2022"},{"title":"TOPPING DX3 Pro+ Headphone Amp + DAC + Pre-Amp","link":"https://www.youtube.com/watch?v=GV8YCh5I28A","source":"Consumer Tech Check","datePublished":""},{"title":"Topping DX3 Pro+ Review","link":"https://www.headfonia.com/topping-dx3pro-plus-review","source":"Headfonia","datePublished":""},{"title":"Topping DX3 Pro+ Review","link":"https://headfonics.com/topping-dx3-pro-plus-review","source":"Headfonics","datePublished":""},{"title":"Topping DX3 Pro Plus - A Giant Killer DAC/AMP?","link":"https://iiwireviews.com/topping-dx3-pro-plus-a-giant-killer-dac-amp","source":"iiWi Reviews","datePublished":""},{"title":"TOPPING DX3 Pro+ DAC Review","link":"https://primeaudio.org/topping-dx3-pro-dac-review","source":"Prime Audio","datePublished":""},{"title":"DX3 Pro+ Review","link":"https://www.audiosciencereview.com/forum/index.php?threads/topping-dx3-pro-review-dac-headphone-amp.27148/","source":"audiosciencereview.com","datePublished":""}]
An excellent review of a great product
/
Publisher
/
3/1/2022
An excellent review of a great product
Publisher
/
3/1/2022

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:

  • Topping emphasizes achieving extremely low distortion and high signal-to-noise ratios in their products, often exceeding the measurable limits of testing equipment.
  • They offer a range of products (DACs, headphone amplifiers, and integrated amps) that can be easily stacked together, creating a cohesive and aesthetically pleasing desktop setup.

D10s:

  • Positioning: Entry-level line, designed for affordability and compactness.
  • Description: Offers a simple yet effective solution for those seeking a budget-friendly DAC with solid performance. Features a USB input and RCA output, making it ideal for small setups or desktop use, unlike the D10 Balanced which offers additional balanced outputs for more complex systems.

D10 Balanced:

  • Positioning: Mid-range option with balanced output capabilities.
  • Description: Stands out with its balanced outputs, providing better noise rejection and improved sound quality compared to the D10s. This makes it suitable for users who need balanced connections for their audio systems.

D50s:

  • Positioning: Mid-tier DAC with enhanced features for audio enthusiasts.
  • Description: Equipped with dual DAC chips, offering superior sound quality and more detailed audio reproduction than the D10 series. It also includes Bluetooth connectivity, making it more versatile for users who want wireless streaming capabilities, unlike the D10 models which lack this feature.

D50 III:

  • Positioning: Advanced DAC with high-resolution audio support.
  • Description: Improves upon the D50s with upgraded DAC chips and enhanced power supply design, delivering even clearer and more dynamic sound.

D90 III Discrete:

  • Positioning: High-end DAC with discrete component design for audiophiles.
  • Description: Features a fully discrete circuit design, providing exceptional sound quality and precision, setting it apart from the D50 series.
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Avg. Product Price
$500
Used For Sale
63
 Available (Scroll Down)
Brand Popularity
28
 of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
44
Founding Year
2008

Our take on the brand

Topping Audio is a measurement-focused hifi brand that developed its own proprietary PSRM DAC architecture and NFCA amplifier topology to achieve exceptionally low distortion levels. Their products, from the flagship D90 III Discrete DAC to entry-level interfaces like the E2x2, use advanced technologies like custom I/V conversion stages and high-feedback Class B designs to deliver clean, accurate sound reproduction.

Look inside the brand

Brand Page

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

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From our interview with
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What if you spend more?

Product image
Chord Electronics
Mojo 2
650
650
/
65
Reviews
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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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.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page
Product image
iFi
xDSD Gryphon
599
599
/
30
Reviews
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 Amazon
Expand Details

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.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page
Product image
aune
S17 Pro
699
699
/
9
Reviews
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.
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Expand Details

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.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page
Product image
EarMen
CH-Amp
559
559
/
7
Reviews

Unleash the Power of Composite Amplifier Topology

The CH-Amp incorporates a Composite Amplifier Topology, combining the best of both worlds with excellent DC and AC characteristics. Unlike traditional power amplifiers that can experience errors and performance degradation when driving heavy loads, the composite op-amp eliminates these issues, ensuring optimal circuit performance. Benefit from improved DC output-offset and enhanced overall circuitry performance with the CH-Amp.

Unparalleled Design and Construction

EarMen CH-Amp is meticulously crafted with high-quality components, including WIMA capacitors, audio electrolytes, MELF low noise resistors, and SoundPlus OPA1642 operational amplifiers. This carefully chosen combination results in a neutral sound signature and exceptional characteristics, including low signal-to-noise ratio, ultra-low Total Harmonic Distortion (THD), and excellent frequency response. Experience pristine audio reproduction and plenty of power, even under high loads.

Flexible Connectivity and Control

CH-Amp offers two key features: preamp outs and a gain switch. Take advantage of the balanced and single-ended preamp outputs, allowing you to connect powered monitors for a complete audio system. The gain switch provides precise control over output level and impedance, ensuring optimal matching with your headphones. Tailor your audio experience to perfection with EarMen CH-Amp.

Exceptional Craftsmanship

CH-Amp features a full block aluminum chassis, guaranteeing durability and robustness. Its compact design allows seamless integration into any environment or home audio system. The PCB is securely embedded within the solid aluminum housing, providing enhanced protection and insulation against external influences. Enjoy a reliable and long-lasting audio companion with EarMen CH-Amp.

Fully Balanced Architecture for Pure Sound

EarMen CH-Amp embraces a fully balanced architecture, preserving the integrity of the audio signal from the source to the output. The balanced outputs remain intact and are only amplified, ensuring pristine sound reproduction. The single-ended inputs are expertly converted to balanced signals without phase shift or imbalance, guaranteeing optimal phase alignment. Say goodbye to unwanted artifacts and immerse yourself in pure audio bliss.

Extra Low Linear Power Supply

With the CH-Amp, you also receive an extra low noise linear power supply designed without compromise, using top-of-the-line components and the latest circuit design techniques. EarMen's linear power supply is both reliable and simplistic, producing minimal noise for an undistorted audio experience. It is custom-made for our devices to deliver exceptional efficiency and exceed your expectations. Furthermore, it includes protection against current overload, short circuit, and thermal overload, adhering to the highest safety standards.

Release the Full Potential: Create Your All-in-One System

The EarMen Linear power supply can be seamlessly connected to the EarMen Tradutto DAC and EarMen Staccato Streamer, transforming your setup into a powerful all-in-one audio system. Enjoy the convenience and flexibility of a unified audio solution without compromising on performance.

EarMen is a European-manufactured hifi brand that draws from their decade of tube amplifier experience to create DACs and amplifiers with a neutral, natural sound signature. Their products feature fully balanced designs and are engineered to minimize signal interference from Bluetooth, WiFi, and mobile devices, while offering unique features like dual headphone outputs in their portable units.
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Product Strengths

  • Very clean, smooth, and enjoyable sound without harsh edges or digitization
  • Plenty of power for a wide range of headphones and IEMs due to its 3.8 watts into a 32 ohm load
  • Comes with a linear power supply that provides clean power and minimizes noise
  • Includes a remote control that can also control the matching DAC
  • Offers versatile connectivity with balanced and single-ended pre-outputs, as well as multiple line inputs

Product Considerations

  • 4.4mm connections are used for balanced input/output, which may require purchasing new cables if existing XLR cables are already owned
  • The VU meter on the front of the device may not be very useful for normal listening levels
  • Settings are not held when the amplifier is turned off
  • There is noise in headphones when the unit is turned off or on from standby mode

Comparisons (according to reviewers)

  • Vs Burson Audio Soloist 3XP: Champ provides more body and weight to the sound, while the Soloist 3XP offers greater space and separation

Takeaway: The CH-Amp is a compact and versatile amplifier that delivers a clean and enjoyable sound, making it a great choice for those looking for a high-quality listening experience. Its ability to pair well with a variety of headphones and IEMs makes it a worthwhile addition to any setup.

Video review

Our take on the brand

EarMen is a European-manufactured hifi brand that draws from their decade of tube amplifier experience to create DACs and amplifiers with a neutral, natural sound signature. Their products feature fully balanced designs and are engineered to minimize signal interference from Bluetooth, WiFi, and mobile devices, while offering unique features like dual headphone outputs in their portable units.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page

What competes at this price?

Topping
G5
299
/
Released
2022
Check Amazon
Topping Audio is a measurement-focused hifi brand that developed its own proprietary PSRM DAC architecture and NFCA amplifier topology to achieve exceptionally low distortion levels. Their products, from the flagship D90 III Discrete DAC to entry-level interfaces like the E2x2, use advanced technologies like custom I/V conversion stages and high-feedback Class B designs to deliver clean, accurate sound reproduction.
Expand Details

Our Summary

Product Strengths

  • Phenomenal sound quality.
  • Very usable and enjoyable interaction due to a physical volume knob.
  • Plenty of power for almost everything and can drive just about anything.
  • Versatile; it can be used as a desktop all-in-one, a Bluetooth portable DAC/amp, a portable amplifier, and even a DAC for speakers.

Product Considerations

  • Susceptible to EMI noises, which can be a deal breaker; static noises, pops, and crackle sounds can occur when a phone is placed directly on top of it.
  • Not a completely balanced architecture; the 3.5mm & 4.4mm headphone outputs sound the same.
  • Charging port may not indicate charging on anything higher than an 18W charging block, and some chargers may not work.

Comparisons (according to reviewers)

  • Vs FIIO BTR-7: Sounds more refined and has more detail and resolution.
  • Vs SMSL C200: The C200 sounds significantly warmer with a fuller, juicier bass line and a little bit more airy, while the G5 is more focused on clean and clear edges, tidy, well-focused—and clean.
  • Vs SMSL M500 MK2: The M500 MK2 sounds overall better with dynamics at the same level as the G5 and fuller, warmer tonality—and a bigger, more spacious soundstage.
  • Vs Moondrop Moonriver 2: The treble is more refined, better details up top, and a sharp edge without being overboard like the Moonriver 2 can.

Takeaway: The G5 is a well-built and versatile portable DAC/amp with a neutral, clean, and dynamic sound. It is great for those looking for an all-in-one solution that can drive almost any headphone or IEM.

Video review

Our take on the brand

Topping Audio is a measurement-focused hifi brand that developed its own proprietary PSRM DAC architecture and NFCA amplifier topology to achieve exceptionally low distortion levels. Their products, from the flagship D90 III Discrete DAC to entry-level interfaces like the E2x2, use advanced technologies like custom I/V conversion stages and high-feedback Class B designs to deliver clean, accurate sound reproduction.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page
iFi
GO blu
199
/
Released
2021
With Hi-Fi inspired architecture featuring dedicated Bluetooth, DAC, and Amp stages, the ultra-portable GO blu offers the best of both worlds – wireless freedom, paired with the clarity of wired sound.
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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

  • Detailed and expansive presentation, offering a sonic upgrade to phones, especially when portability is a priority
  • Versatile, with both wired and wireless connectivity options, including balanced and unbalanced headphone outputs
  • Impressively small size and lightweight design, making it pocket-friendly and convenient for on-the-go use
  • Sound quality is generally linear, with fast and accurate bass, flat and clean mids, and a detailed treble that is not harsh
  • XBass and XSpace features offer customized listening experiences
  • Build quality and aesthetics are generally well-received, with its design standing out from other devices
  • ChronoDial volume knob is particularly praised for its tactile feel and functionality

Product Considerations

  • Black rubberized plastic casing can feel a bit flimsy to some users
  • Some reviewers noted hiss with sensitive IEMs, especially on the balanced output
  • Battery life estimation can be unreliable
  • No dedicated app for the device, limiting EQ and DSP options
  • Lacks a clip, making it less convenient for truly portable use

Comparisons (according to reviewers)

  • Compared to the Audiolab M-DAC Nano, the Go Blu offers a wider soundstage, better separation, and dynamic sensitivity, though the M-DAC Nano is fractionally punchier in the bass
  • Compared to the AudioQuest DragonFly Cobalt, the Go Blu is a wireless proposition, unlike the DragonFly Cobalt, which is a USB plug-in DAC
  • Compared to the FiiO Q3, the iFi GO blu highs are a bit too brilliant, but everything else sounded quite impressive
  • Compared to the NuPrime Hi-mDAC, the iFi GO Blu mids sound a lot like it, even if voices are slightly less natural
  • Compared to the Hidizs S9 Pro and Aune BU2, the GO Blu provides a relaxed sound and has better build and functionality compared to the Hidizs S9 Pro, but is better when using bluetooth compared to Aune BU2, however when competing on wired terms, the Aune is clearer

Takeaway: The iFi GO blu is a tiny but mighty device that delivers impressive sound and versatility—improving the wireless music experience. It is easy to use and has some cool features, making it a good pick for anyone looking for a portable upgrade for their headphones.

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.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
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SMSL
DO400
499
/
Released
2023
The DO400 is an ES9039SPRO audio DAC that supports MQA decoding and MQA-CD. It features a new 3rd generation XMOS XU-316, with PCM support up to 32bit/768kHz and DSD support to DSD512. The new generation flagship DAC chip ES9039MSPRO of USA ESS has built-in MQA hard decoding.
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SMSL, a Shenzhen-based hifi brand, stands out for its use of advanced chipsets like Infineon's MERUS and ES9039Q2M, which have been objectively verified to deliver exceptionally low noise and distortion levels. The brand has earned acclaim from value-conscious audiophiles.
Expand Details

Our Summary

Product Strengths

  • The DO400 is a versatile device, serving as a DAC, preamp, headphone amplifier, and Bluetooth receiver
  • It offers a highly resolving and transparent sound, with a measured dynamic range of 133dB on its XLR output and 126dB on its headphone output
  • It has very tight control over the drivers, sounds quite dynamic and clean, and delivers a punchy sound
  • The DO400 features extensive I/O with HDMI, USB, XLR 4-Pins, and Pentaconn 4-Pins

Product Considerations

  • It does not have analog inputs, which limits the sources one can pair it with
  • The DO400's case cover is steel, and the rotary knob wobbles
  • Some may find its sound signature a bit too linear for some genres
  • The remote control is plastic-y
  • The speedy nature of the ESC by Silicon might result in a less impressive initial kick in the eardrums via headphones, compared to the XLR and RCA outputs

Comparisons (according to reviewers)

  • Compared to the Topping DX7 Pro Plus, the DO400 is more organic and dynamic sounding
  • Compared to the Topping DX5, the DO400 offers noticeably better line output
  • Compared to the Chord Mojo 2, the Chord Mojo 2 sounds better when used as a DAC, offering better detail retrieval and a richer tone timbre, but the DO400 has more power
  • Compared to the SMSL SU-9, the DO400 sounds slightly brighter and less-smoothed over—there's an analytical quality to the treble end

Takeaway: The SMSL DO400 is a great-sounding all-in-one unit that offers a lot of features for the price. Its noiseless performance with IEMs and ability to drive most headphones make it a worthwhile purchase.

Video review

Our take on the brand

SMSL, a Shenzhen-based hifi brand, stands out for its use of advanced chipsets like Infineon's MERUS and ES9039Q2M, which have been objectively verified to deliver exceptionally low noise and distortion levels. The brand has earned acclaim from value-conscious audiophiles.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
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SMSL
HO200
399
/
Released
2021
HO200 Headphone amplifier features a fully balanced design with 4 ultra-low distortion precision linear feedback circuits (PLFC). The distortion is as low as 0.00006%, and the A-WTD is as low as 0.00005% (-126dB).
Check Amazon
SMSL, a Shenzhen-based hifi brand, stands out for its use of advanced chipsets like Infineon's MERUS and ES9039Q2M, which have been objectively verified to deliver exceptionally low noise and distortion levels. The brand has earned acclaim from value-conscious audiophiles.
Expand Details

Our Summary

Product Strengths

  • 'Ridiculous power for a headphone amp' with 6 watts at 16 ohms and 3 watts at 32 ohms
  • Able to drive everything from IEMs all the way through to the most power-hungry headphones
  • Very low noise floor
  • All-metal chassis with a nice matte-black finish
  • Clean, smooth, and detailed sound, without anything to complain about

Product Considerations

  • Volume knob is shallow and not particularly enjoyable to grasp
  • Can be a little edgy up top with certain headphones
  • A little more articulation and crispness at the leading edge of notes would be preferred
  • Some found soundstage smaller than expected
  • Gain is still a little too high for IEMs

Comparisons (according to reviewers)

  • Compared to the SMSL SH-8S, the HO200 has a multi-level gain switch with low, medium, and high and is preamp capable, but the SH-8S is more detailed and textured
  • Compared to the Topping A90, the HO200 is a 'baby brother'
  • Compared to the JDS Labs Atom Amp, it is a lot more dynamic in bass

Takeaway: The SMSL HO200 is a powerful and versatile headphone amplifier that doesn't sound sterile and boring. It is a solid choice for anyone who wants a clean and detailed sound with enough power to drive a wide range of headphones and IEMs.

Video review

Our take on the brand

SMSL, a Shenzhen-based hifi brand, stands out for its use of advanced chipsets like Infineon's MERUS and ES9039Q2M, which have been objectively verified to deliver exceptionally low noise and distortion levels. The brand has earned acclaim from value-conscious audiophiles.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
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aune
X7s
299
/
Released
Check 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

  • Powerful amplifier, described as 'sensible' and capable
  • Smooth and detailed sound quality, with a refined and immersive experience
  • Good build quality, feels solid and well-constructed
  • Versatile, suitable for different headphones, including those with balanced cables
  • Adds an enormous amount of depth to audio, making it speaker-like

Product Considerations

  • Volume attenuator knob may have alignment and usability issues
  • Crossfeed between the input and output ports could present problems
  • Electronic manual is inconveniently located on a USB drive
  • +20dB Gain—the 'over-the-top' Class A experience flavor has recessed treble
  • At +20dB gain, the sound might seem "muddy"

Takeaway: The Aune X7s is a powerful headphone amplifier which does one thing really well, making it worth consideration. Its ability to produce a refined and detailed sound makes it a worthwhile addition to any audiophile's setup.

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.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
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