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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.
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.
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K5
reviews
Video Review
Manufacturer details
Features
Specifications
- Model: K5
- Chip Set: CT7601SR + MS8416 + PCM5100 + MAX97220
- Headphone Impedance: 16Ω - 300Ω
- Input Type: USB Type-C, Optical, Coaxial, Microphone
- Output Type: 3.5mm Headphone, RCA
- USB Sampling Rate: 24Bit/96kHz
- Optical/Coaxial Sampling Rate: 24Bit/192kHz
- THD: ≤0.001%
- SNR: ≥110dB
- Device Dimension: 4.43.71.2 inch
- Net Weight: 0.55lb (251g)
- Power Input Interface: USB Type-C
- RCA Output Level: 2V
- Power Supply: 5V
Description
Fosi Audio Upgrade DAC K4 is a digital decoder and HiFi headphone amplifier all-in-one, supporting optical, coaxial, USB Type-C.
Release Timeline
Manufacturer Site
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:
- Fosi incorporates adjustable treble and bass controls, allowing users to customize the sound signature to their preference and the characteristics of their speakers or headphones.
- The brand emphasizes value by utilizing quality components, such as name-brand capacitors and amplifier chips, at very competitive price points.
- Fosi Audio often includes versatile connectivity options, such as RCA, Bluetooth, and pre-outs, enabling compatibility with a wide range of audio sources and setups.
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Avg. Product Price
$500
Used For Sale
3
Available (Scroll Down)
Brand Popularity
48
of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
23
Founding Year
2017
Our take on the brand
Fosi Audio makes quality hifi accessible worldwide by offering a diverse range of amplifiers, preamps, and DACs that blend modern engineering with vintage-inspired design. Their products are engineered for versatility and power, serving both audiophiles and gamers with impressive performance at competitive prices. With a strong reputation built on solid reviews and customer focus, Fosi Audio stands out as a go-to brand for enthusiasts seeking exceptional sound without breaking the bank.
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What if you spend more?
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EverSolo
DMP-A6
769
769
/
25
Reviews
EverSolo is a newer hifi audio brand that makes affordable, high-performance DACs and streamers. The brand appeals to budget-conscious audiophiles by offering features typically found in more expensive equipment, such as dual AKM4499EX DAC chips and R2R volume control, at more accessible price points.
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Our summary
Product Strengths
- Excellent and responsive touchscreen display, and user-friendly interface that is intuitive and easy to navigate
- Versatile as an all-in-one device, functioning as a streamer, DAC, pre-amp, and media storage server with a competitive price point
- High build quality, featuring a solid aluminum alloy chassis
- Supports a wide variety of streaming services, including Tidal, Qobuz, Spotify, Amazon Music, Apple Music, and more
- Rock solid as a streamer, especially when going into a separate DAC
Product Considerations
- Customer support from Eversolo may be limited, with some reviewers noting slow or nonexistent responses to inquiries
- Internal DAC, while good, is not on par with higher-end—more expensive DACs
- Lack of a traditional I/R remote could be a drawback for some users
- Some unusual control procedures are noted, such as the inability to power on the unit from the mobile app
Comparisons (according to reviewers)
- The DMP-A6 sounds just as good as the Lumin U2 Mini as a streamer
- The A6 beats the Bluesound Node when used only as a streamer
- The A6 has similar features, a similar control/display, and a similar size and shape
- The Lumin U2 has more "shine", dynamics, solidity and is a touch more refined than the A6
- The Eversolo is favored over the iFi Neo Stream, especially as a streaming DAC
- Eversolo proves it can play with Cambridge Audio CXN (V2) in many ways
Takeaway: The Eversolo DMP-A6 is a versatile and user-friendly streamer that delivers great value, and it provides a great streaming experience with its screen. It is a great entry point into high-resolution digital audio and can serve as the center of a modern hifi system.
Video review
Our take on the brand
EverSolo is a newer hifi audio brand that makes affordable, high-performance DACs and streamers. The brand appeals to budget-conscious audiophiles by offering features typically found in more expensive equipment, such as dual AKM4499EX DAC chips and R2R volume control, at more accessible price points.
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iFi
NEO iDSD 2
899
899
/
20
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.
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Product Strengths
- The NEO iDSD 2 functions as a versatile all-in-one (AIO) solution, working as a DAC, headphone amplifier, and preamplifier
- It has a significantly more powerful amplifier section than its predecessor, making it better at driving a wider range of headphones
- Includes sound-shaping features such as XBass and XSpace, plus selectable digital filters, allowing users to customize the sound
- Comprehensive connectivity options include USB, S/PDIF (coaxial/optical), Bluetooth 5.4 with aptX Lossless, and both balanced XLR and single-ended RCA outputs
Product Considerations
- The amplifier section may not be powerful enough to drive some very power-hungry headphones to their full potential
- The Nexis app only works with a 2.4ghz WiFi signal
- There is a slight click or noise when switching inputs as a pre-amp
- Some reviewers would have preferred the inclusion of the iPower X power adapter instead of the iPower V2, considering the unit's price
- The variable volume output may not save the last used settings
Takeaway: The iFi Audio NEO iDSD 2 combines a high-quality DAC with a significantly improved headphone amplifier, making it a good all-in-one solution for desktop audio. With its wide range of features, solid build quality, and pleasing sound, the NEO iDSD 2 is a worthwhile upgrade.
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.
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EverSolo
DAC-Z8
699
699
/
15
Reviews
EverSolo is a newer hifi audio brand that makes affordable, high-performance DACs and streamers. The brand appeals to budget-conscious audiophiles by offering features typically found in more expensive equipment, such as dual AKM4499EX DAC chips and R2R volume control, at more accessible price points.
Expand Details
Product Strengths
- Exceptional build quality, with a premium feel thanks to the aluminum chassis and attention to detail
- Clean, crisp, and clear sound, with a neutral presentation that resolves detail well
- Well-implemented headphone amplifier that can drive a wide range of headphones, and the headphone level reverts to the last used
- Bright and crisp LCD screen with VU meters adding to its visual appeal
- Versatile connectivity with USB-B, USB-C, optical, coaxial, and Bluetooth inputs, as well as balanced XLR and RCA outputs
Product Considerations
- Lacks HDMI ARC input, which would be useful for hybrid setups
- Some reviewers find the treble a little aggressive and fatiguing with certain recordings or speakers
- No Wi-Fi or Ethernet connectivity, meaning a computer or other network streaming device is needed
- No dedicated subwoofer output
- Not a tone control, those looking for a colored or editorialized sound should look elsewhere
Comparisons (according to reviewers)
- The Z8 has a more nuanced presentation and better separation than the Cambridge Audio DACMagic 200M
- The Z8 is smoother with a darker background on the headphone output, but the SMSL M500 MKII is warmer and fuller sounding on the line outputs
- The Z8 has a cleaner sound, darker background, and deeper soundstage on the line-outs than the Topping DX5, but the DX5 has more powerful headphone amplification
- Java Hi-Fi gives a slightly cleaner presentation with more authority in the bass than the Z8
Takeaway: The Eversolo DAC-Z8 is a well-built and versatile DAC that delivers a clean and detailed sound. It is a great option for users looking for a high-quality DAC with a range of features, including a headphone amplifier and preamp capabilities.
Video review
Our take on the brand
EverSolo is a newer hifi audio brand that makes affordable, high-performance DACs and streamers. The brand appeals to budget-conscious audiophiles by offering features typically found in more expensive equipment, such as dual AKM4499EX DAC chips and R2R volume control, at more accessible price points.
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Matrix Audio
Mini-i 4
649
649
/
16
Reviews
The all-new music streamer mini-i 4 does not only have a rich set of digital inputs with excellent digital audio processing capabilities, but also supports various network streaming protocols. Combined with a self-developed high-quality digital audio/streaming playback system MA Player and the controller app MA Remote App, it easily plays a vast amount of online streaming music, provides you with an exceptional high-fidelity listening experience.
Matrix Audio is a hifi brand known for their DACs and streamers that feature a unique H-shaped chassis design for mechanical stability and circuit optimization. Their products include built-in NVMe SSD storage slots and natively integrate HIGHRESAUDIO streaming, while offering control through their proprietary MA Remote App and MA Player software system.
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Product Strengths
- Excellent sonic performance, characterized by neutrality, transparency, and detail retrieval
- The MA Remote app is intuitive and feature-rich, offering access to various streaming services and settings
- Solid build quality with an aluminum chassis, though the sides are plastic, and a bright, clear LCD screen
- Versatile connectivity with a wide array of inputs, including USB-C for external storage, HDMI ARC, optical, coaxial, and analog RCA inputs
Product Considerations
- Lacks wireless connectivity—no Wi-Fi or Bluetooth
- Does not come with a physical remote, the RM5 is sold separately
- Some users have experienced issues with navigating large local music libraries
- Some reviews mention the touch screen controls being a bit fiddly
- No digital output to support an external DAC
Comparisons (according to reviewers)
- Vs Bluesound Node (2021): Mini-i 4 has better detail retrieval and is cleaner sounding
- Vs EverSolo DMP-A6: DMP-A6 sounds more natural with bolder bass and better soundstaging, while Mini-i 4 sounds tonally and spatially flatter
- Vs Matrix Audio Mini-i 3 Pro: Mini-i 4 has a wider range of source repositories and USB storage reader
Takeaway: The Matrix Audio Mini-i 4 is a great sounding device for anyone wanting a DAC and streamer that can do it all. With its comprehensive set of features and focus on audio quality, enjoying music becomes easy.
Video review
Our take on the brand
Matrix Audio is a hifi brand known for their DACs and streamers that feature a unique H-shaped chassis design for mechanical stability and circuit optimization. Their products include built-in NVMe SSD storage slots and natively integrate HIGHRESAUDIO streaming, while offering control through their proprietary MA Remote App and MA Player software system.
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What competes at this price?
Fosi
GR40
149
/
Released
2024
The GR40 is a versatile tube DAC preamplifier and headphone amplifier in one, it supports Bluetooth/USB/Optical/Coaxial inputs and active speakers/3.5mm headphone output, with a priority mode for headphones.
Fosi Audio makes quality hifi accessible worldwide by offering a diverse range of amplifiers, preamps, and DACs that blend modern engineering with vintage-inspired design. Their products are engineered for versatility and power, serving both audiophiles and gamers with impressive performance at competitive prices. With a strong reputation built on solid reviews and customer focus, Fosi Audio stands out as a go-to brand for enthusiasts seeking exceptional sound without breaking the bank.
Expand Details
Our Summary
Product Strengths
- Solid build quality with a fully aluminum alloy construction
- Feature-rich with USB, Optical, Coaxial, and Bluetooth 5.1 inputs
- Offers a unique, warm, and rounded sound signature typical of vacuum tubes
- Includes dedicated analogue bass and treble tuning knobs for sound customization
- Easy to use with a straightforward control system and no complicated menus
Product Considerations
- Tubes can be a bit hard to install
- Can sound a bit too smooth and lacking texture
- Not ideal for pairing with sensitive IEMs due to noise
- EQ knobs can be finicky to use
- The treble and bass knobs required significant force to rotate them
Takeaway: The GR40 is a well-built and versatile tube amplifier that offers a warm and unique sound. With its easy-to-use design and customizable sound, it can bring a new listening experience to headphones.
Video review
Our take on the brand
Fosi Audio makes quality hifi accessible worldwide by offering a diverse range of amplifiers, preamps, and DACs that blend modern engineering with vintage-inspired design. Their products are engineered for versatility and power, serving both audiophiles and gamers with impressive performance at competitive prices. With a strong reputation built on solid reviews and customer focus, Fosi Audio stands out as a go-to brand for enthusiasts seeking exceptional sound without breaking the bank.
Product Page
Product Page
Fosi
ZD3
219
/
Released
2024
The ZD3 is a audiophile-grade balanced stereo DAC meticulously developed by Fosi Audio after thoroughly understanding user needs. It features the ES9039Q2M high-precision DAC chip, delivering rich and superior sound.
Fosi Audio makes quality hifi accessible worldwide by offering a diverse range of amplifiers, preamps, and DACs that blend modern engineering with vintage-inspired design. Their products are engineered for versatility and power, serving both audiophiles and gamers with impressive performance at competitive prices. With a strong reputation built on solid reviews and customer focus, Fosi Audio stands out as a go-to brand for enthusiasts seeking exceptional sound without breaking the bank.
Expand Details
Our Summary
Product Strengths
- Good build quality aesthetically matches Fosi Audio's ZA3 amplifier
- Offers a variety of digital inputs including USB, optical, coaxial, HDMI ARC, and Bluetooth
- Can be used as a DAC or a preamp with a defeatable preamp function, selected via a switch on the bottom
- Features balanced XLR and single-ended RCA analog outputs
- Allows for op-amp rolling to fine-tune the sound signature
Product Considerations
- Lacks RCA input, which may be a drawback for users with analog sources like turntables
- The preamp bypass switch on the bottom of the unit can be fiddly to access
- Display is a little challenging to see from a distance
- The physical feel might suggest it was built to a budget, depending on user's perception
- Some reviewers found it necessary to remove the switch from the casework to swap the op-amps
Comparisons (according to reviewers)
- Vs SMSL D6S: The D6S sounded more rounded and natural with stock op-amps, but the ZD3 could surpass it with specific op-amp choices like JRC4580Ds, the D6S casework looks better finished
- Vs SMSL SU-1: The ZD3 sounds more polished and detailed, though less punchy, than the SU-1
- Vs FiiO K11: The K11 is slightly warmer and milder, but the ZD3 is more transparent
Takeaway: The Fosi Audio ZD3 is a versatile and affordable DAC/preamp that offers a range of connectivity options and the ability to customize its sound through op-amp rolling. It is a good option for those looking for a well-performing DAC that integrates well with other Fosi Audio products.
Video review
Our take on the brand
Fosi Audio makes quality hifi accessible worldwide by offering a diverse range of amplifiers, preamps, and DACs that blend modern engineering with vintage-inspired design. Their products are engineered for versatility and power, serving both audiophiles and gamers with impressive performance at competitive prices. With a strong reputation built on solid reviews and customer focus, Fosi Audio stands out as a go-to brand for enthusiasts seeking exceptional sound without breaking the bank.
Product Page
Product Page
iFi
GO bar
329
/
Released
2022
The GO bar may be the size of a USB stick, but with powerful sound customisation and 10x the output power of your iPhone, it's your portable audio powerhouse - ready for any adventure.
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
- Comprehensive specifications, aiming to equal or improve upon existing portable DACs
- Features a balanced 4.4mm output and a single-ended 3.5mm headphone output
- High power output, described as the most powerful headphone amp of its size
- Includes XBass+ and XSpace analog processing for sound enhancement
- Supports PCM up to 384kHz, DSD up to 256, and DXD
Product Considerations
- The blue text on the blue chassis is hard to read in almost any lighting condition
- Can be considered chunky compared to other dongle DACs
- Can be noisy and produce audible hiss with sensitive IEMs, though IEMatch can help mitigate this
- High power consumption potentially impacts battery life of the source device
- The digital filters can be tricky to access, according to one review
Takeaway: The iFi Audio GO bar is a powerful and versatile portable DAC/amp that can drive most headphones, providing a clean and detailed sound. It is packed with features and offers good sound quality, making it a great option for enjoying high-resolution music 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.
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AudioQuest
DragonFly Cobalt
199
/
Released
2019
DragonFly Cobalt, the latest and most sophisticated member of the award-winning DragonFly franchise, is a USB DAC (digital-to-analog converter), preamplifier, and headphone amplifier. It bypasses the audio circuitry in laptops, computers, and smartphones to deliver cleaner, clearer, more naturally beautiful music to headphones, powered speakers, or complete audio systems.
AudioQuest is known for its massive library of hifi audio cables and its DBS and ZERO technology to minimize distortion.
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Our Summary
Product Strengths
- Provides a simple, effective, and affordable solution to improve sound quality from computers
- Delivers a bold sound that is brimming with punch and detail, offering a more natural and vivid listening experience
- Improves clarity and cohesiveness of sound with seamless transitions between low, middle, and high frequencies
- Offers excellent value for money, representing a worthwhile upgrade for those who care about sound quality and listen to music on laptops, tablets, or smartphones
- The slow roll-off filter in the Cobalt allows for a more natural and balanced sound
- Connectivity options offer usage with a variety of devices
Product Considerations
- Maximum output voltage before clipping drops quite early on as load impedance decreases, due to the output stage's finite current supply
- Maximum PCM sample rate remains 96/24, and DSD is not supported natively
- DragonTail adaptor fits poorly
- Some users reported a firmware bug, on some mobile devices turning volume down to zero results in full blast volume
Takeaway: The DragonFly Cobalt is a small, portable device that improves music sound quality. It is a great choice for anyone wanting to improve their listening experience.
Video review
Our take on the brand
AudioQuest is known for its massive library of hifi audio cables and its DBS and ZERO technology to minimize distortion.
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Cambridge Audio
DacMagic 200M
399
/
Released
2021
Digital audio files can be packed with incredible musical detail, but they need to be converted to analogue first for you to hear it. And how good it sounds will depend on how well the digital audio from your computer, network player or CD is converted. DacMagic 200M's twin ESS DACs decrease crosstalk and improve separation because there's a DAC dedicated to both left and right channels. These fully balanced, optimised, and efficient signal paths reveal previously hidden glittering musical prizes.
Cambridge Audio pioneered the use of toroidal transformers in power amplifiers, a technology now widely adopted by high-end audio companies. The brand stands out for using premium amplification technology across their product range, from Class A/B amplifiers in their wireless earbuds to Hypex Ncore modules in their EVO series, while maintaining accessible price points between their CX and Edge product lines.
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Our Summary
Product Strengths
- Rich feature set is its ace card
- Presents a very clean, detailed, and dynamically punchy sound
- Tonal smoothness and expansive soundstage
- Balanced and unbalanced outputs, plus a headphone output
Product Considerations
- Front fascia is a wee bit cluttered
- Lacklustre feel of the volume control
- No remote control
- The headphone output is a useful convenience feature, but it doesn't live up to the unit's performance in other areas
- Auto-shut-off feature turns it off after a little while of not being used
Comparisons (according to reviewers)
- Vs Chord Mojo: Chord edges ahead in performance, delivering even greater subtlety and rhythmic precision, but it can't match the DacMagic 200M's impressive feature versatility
- Vs Schiit Bifrost: Bifrost offers more meat on music's bones, making the DacMagic 200M sound comparatively lighter weight, presenting a skinnier version of the music at hand
- Vs Denafrips ARES II: The DacMagic 200M sounds pale as it does its best to tease out music's kaleidoscope of tone colors
- Vs Audiolab M-DAC+: Rhythmically the DacMagic 200 does a good enough job, it can't compete with the next tier up of DACs costing close to twice its price
- Vs Pro-Ject Pre Box S2 Digital: The sound of the Pro-Ject DAC was not as different from that of the DacMagic
Takeaway: The DacMagic 200M is a feature-rich device with good sound, offering balanced and unbalanced outputs, plus a headphone output. Its versatile feature set makes it a great all-rounder at its price point.
Video review
Our take on the brand
Cambridge Audio pioneered the use of toroidal transformers in power amplifiers, a technology now widely adopted by high-end audio companies. The brand stands out for using premium amplification technology across their product range, from Class A/B amplifiers in their wireless earbuds to Hypex Ncore modules in their EVO series, while maintaining accessible price points between their CX and Edge product lines.
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