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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.
All
HP-A3mk2
reviews
Manufacturer details
- USB Input: Up to 192 kHz/32bit
- Digital Input: S/P DIF (32 kHz to 96 kHz)
- Headphone Output Power: 100 mW (32Ω load), 20 mW (300Ω load)
- Headphone THD: 0.03% or less (32Ω load at 1 kHz 100 mW output)
- Analog Output Level: 2 Vrms
- Dimensions: 113 mm (W) x 34 mm (H) x 155 mm (D)
- Weight: Approx. 500 g
- Power Supply: DC 5V (USB powered)
- Power Consumption: 2.5 W
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:
- Fostex integrates traditional Japanese artistry, such as Urushi lacquering and Aizome dyeing, into the design of their headphone housings, amplified by the acoustic properties of materials like Japanese cherry birch and maple wood.
- They leverage their "Biodyna" driver technology, optimized with high magnetic flux densities (often using neodymium magnets), enabling detailed, dynamic, and low-distortion sound.
- Their headphones are designed to be easily driven by a wide range of devices, often featuring a low impedance (25-32 ohms) and high sensitivity, increasing versatility and convenience for users.
Select products
TH616
- Position: The entry-level unit offering basic amplification and straightforward control.
- Description: Offers a simple design with clear controls suited for small room setups and limited connectivity, making it a budget-friendly option. Compared to the other models, it has a more basic feature set and lower output capabilities for users who do not require advanced performance or multiple functions.
TH808
- Position: A compact mid-range option focused on balanced performance.
- Description: Features a clean signal path and improved circuitry that supports better dynamic range and connectivity compared to entry-level models. Relative to the TH616, it delivers enhanced performance while maintaining a moderate price.
TH900MK2
- Position: A mid-range model with advanced digital control and refined tuning.
- Description: Incorporates digital tuning and smarter circuitry to boost clarity and responsiveness, making it well suited for varied room sizes and sonic goals. When compared with the TH616 and TH808, it provides a noticeable upgrade in audio detail and connectivity.
TH1100RP
- Position: A high-end integrated unit designed for higher resolution performance.
- Description: Offers robust processing and precise digital-to-analog conversion to deliver clean and powerful output for users with higher technical requirements. In contrast to the mid-range TH900MK2, it provides more detailed signal processing and expanded functionality.
T60RPMK2
- Position: A flagship model that brings premium control and complete feature integration.
- Description: Delivers groundbreaking performance with advanced components and a design focused on full connectivity and high-end sonic control. Compared to the lower-end models like the TH616 and TH808, it provides superior build quality and extensive functionality.
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Used
Fostex
What if you spend more?
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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
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
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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
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.
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
What competes at this price?
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
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
Our Summary
Product Strengths
- Fantastic build quality, aggressive contemporary design
- Includes a solid, workable leatherette case
- Delivers fun, V-shaped tuning with thumping bass, direct midrange, and bold treble
- Delivers fun, detail, dynamics, precision and a bold sound character
- Versatile, functioning as a Bluetooth receiver, a dongle DAC, and a desktop DAC amp combo
Product Considerations
- Buttons rattle a bit
- Larger than past models like the BTR5
- Mediocre battery duration
- Sharp edges
- FiiO only recommends headphones of up to 150Ω
Comparisons (according to reviewers)
- Compared to the Questyle M15, the M15 has a more balanced sound and even more textures and resolution
- Compared to the iFi Audio Go Blu, the BTR7 wins in sound staging depth
Takeaway: The BTR7 is a competent Bluetooth DAC/AMP that will handle IEMs and headphones alike and also works as a capable USB dongle. With a dedicated smartphone app for EQ and solid sound quality, it is an excellent value.
Video review
Our take on the brand
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
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
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