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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.
Product Strengths
- Good build quality with an all-metal casing that feels solid
- Simple manual containing all necessary information
- Versatile, with options to connect via Bluetooth, optical input, or mini jack
- Can be used as a receiver for passive or active speakers
- Has banana plug options for speaker cables
Product Considerations
- The reviewer had issues separating channels, and could only get two channels to work properly
- Remote control is made of plastic and not particularly special
- Cable management can be an issue
Takeaway: The HT4S is a versatile and well-built receiver with multiple connectivity options that can be used for a variety of purposes including sim racing. The unit is powerful and delivers a punch.
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
HT4S
reviews
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An excellent review of a great product
/
Publisher
/
3/1/2022
An excellent review of a great product
Publisher
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3/1/2022
Video Review
Manufacturer details
Features
Specifications
- Channel: Bluetooth 4.1 CH Amp
- Input: Bluetooth + 3.5mm AUX + OPT
- Output: 3.5mm Pre-Out + Speaker Out
- SNR: ≥88dB
- THD: ≤ 0.03%
- Terminal Impedance: 4-8Ω
- Rated Power Output: 30w4+60W1
- MAX Power Output: 50Wx5 @4Ω
- Work Voltage: AC 110V - 240V
- Product Dimensions: 6.1 x 7.2 x 2 inches
Description
All-in-One Fosi Audio HT4S Multi-Channel Integrated Power Amplifier Easily handle various audio inputs and outputs, providing up to 5 channels of output for seamless integration and flexible configurations to meet diverse audio needs.
The built-in power supply design achieves minimal footprint, and the front panel indicator light adds a sense of atmosphere; whether it is simulator racing, patio parties, or immersive movie watching, The HT4S integrated amplifier is your ideal choice.
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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Brand Page
Our interview with the brand
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Used
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What if you spend more?
Pro-Ject
MaiA S3
799
799
/
6
Reviews
Pro-Ject Audio Systems, an Austrian brand founded in 1991, has been at the forefront of reestablishing analog music reproduction to the public. The company handcrafts 95% of all components in the European Union. The turntables focus on manual operation and minimalist design with a wide selection of colors that make their turntables both audio devices and stylish furniture pieces. The brand stands out for offering one of the broadest ranges of high-fidelity products in the world, including turntables, CD players, DACs, streamers, phono preamps, amplifiers, and speakers. Pro-Ject products are engineered with a focus on best audio reproduction for the money and omission of costly, unnecessary features.
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Our summary
Product Strengths
- Noted for its impossibly small and ultra-compact size, making it suitable for compact living spaces
- Offers a feature-rich design with an integrated phono stage, aptX HD Bluetooth connectivity, and additional RCA and TOSLINK digital inputs
- The unit runs cool due to its Class D amplifier design, making it energy-efficient
- Connectivity is praised, particularly the aptX HD Bluetooth, which delivers superior streaming quality
- Delivers a lively and engaging sound with excellent detail across phono and digital connections
Product Considerations
- The limited power output (23W at 8 ohms, 40W at 4 ohms) may be better suited to smaller listening spaces and efficient loudspeakers
- Some reviewers found the bass to be slightly lean, lacking heft or roundness
- The included remote control's button configuration for volume and input selection is unconventional
- The phono stage may benefit from an upgrade with an external phono amplifier for improved performance
- One reviewer found the line out voltage for the subwoofer is not strong enough to drive a powered sub
Comparisons (according to reviewers)
- Compared to the Pro-Ject Stereobox DS2, the MaiA S3 is more affordable and has digital inputs and superior Bluetooth connectivity
- Compared to the Rega Io, the MaiA S3 has strength in depth—specifically referring to the detail across the line, phono and digital connections
- The MaiA S3 is described as more resolving and ultra clean compared to the Rotel amplifier, with the Rotel offering a slightly more colored and warm sound
- Compared to the Technics amplifier, moving to the MaiA S3 results in a faster transit response, especially noticeable in classical music, while the Technics sounds slow in comparison
Takeaway: The Pro-Ject MaiA S3 is a compact and versatile integrated amplifier that delivers impressive sound quality and a range of connectivity options, making it an excellent choice for audiophiles with limited space. It is especially appealing to vinyl enthusiasts looking for a convenient and high-performing solution.
Video review
Our take on the brand
Pro-Ject Audio Systems, an Austrian brand founded in 1991, has been at the forefront of reestablishing analog music reproduction to the public. The company handcrafts 95% of all components in the European Union. The turntables focus on manual operation and minimalist design with a wide selection of colors that make their turntables both audio devices and stylish furniture pieces. The brand stands out for offering one of the broadest ranges of high-fidelity products in the world, including turntables, CD players, DACs, streamers, phono preamps, amplifiers, and speakers. Pro-Ject products are engineered with a focus on best audio reproduction for the money and omission of costly, unnecessary features.
Product Page
Product Page
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.
Product Page
Product Page
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.
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.
Product Page
Product Page
What competes at this price?
Rotel
A8
449
/
Released
2024
The A8 Integrated Amplifier is the perfect fusion of power, size, efficiency, and value tailored for music enthusiasts.
Rotel is a family-owned hifi brand that maintains control over its entire manufacturing process, including producing their own custom toroidal transformers for superior audio performance. Through their Balanced Design Concept and Michi high-end line, Rotel focuses on long-term product development cycles rather than frequent launches, emphasizing genuine performance improvements through careful component selection and circuit design.
Expand Details
Our Summary
Product Strengths
- Offers a full and robust sound
- Simple, stripped-down integrated amplifier that's easy to set up and use, with the essentials covered
- Solidly made, with good build quality and well-engineered controls
- The phono stage is surprisingly good, especially if paired with a modest turntable
- Features tone controls (bass and treble) adjustable by ±6 decibels, are a notable and highly recommended feature
Product Considerations
- Lacks digital inputs and Bluetooth connectivity which are common at its price point
- Has no outputs on the unit whatsoever, which makes integrating a subwoofer rather difficult
- The remote is a large plastic letdown
- At higher volumes, depending on the speakers used, the sound can become a bit aggressive
- The power output is modest
Comparisons (according to reviewers)
- Vs Marantz PM6007: Delivers a more authentic performance thanks to its pleasing resolution and greater insight into the subtleties
Takeaway: The Rotel A8 is a great starter amplifier that's easy to incorporate into any system and has surprisingly audiophile performance for the price. Its simplicity and sound quality make it ideal for those who appreciate straightforward design and solid performance.
Video review
Our take on the brand
Rotel is a family-owned hifi brand that maintains control over its entire manufacturing process, including producing their own custom toroidal transformers for superior audio performance. Through their Balanced Design Concept and Michi high-end line, Rotel focuses on long-term product development cycles rather than frequent launches, emphasizing genuine performance improvements through careful component selection and circuit design.
Product Page
Product Page
Pro-Ject
Stereo Box E
314
/
Released
2024
The Stereo Box E is the all-in-one solution for your HiFi system. The circuitry is purpose-designed for correct and proper HiFi stereo enjoyment. Where other modern affordable amplifiers often prioritize features over quality, the Stereo Box E ensures there are no corners cut to maintain a level of audio quality that is usually seen in much more expensive amplifiers.
Pro-Ject Audio Systems, an Austrian brand founded in 1991, has been at the forefront of reestablishing analog music reproduction to the public. The company handcrafts 95% of all components in the European Union. The turntables focus on manual operation and minimalist design with a wide selection of colors that make their turntables both audio devices and stylish furniture pieces. The brand stands out for offering one of the broadest ranges of high-fidelity products in the world, including turntables, CD players, DACs, streamers, phono preamps, amplifiers, and speakers. Pro-Ject products are engineered with a focus on best audio reproduction for the money and omission of costly, unnecessary features.
Expand Details
Our Summary
Product Strengths
- Tonally sweet and detailed
- Able to engage with faster material
- Impressive phono stage with low noise and plenty of gain
- Extra functionality that works a charm
- 21-watt output is sufficient for any listening level
- Connectivity options
Product Considerations
- Dinky volume control is a little sensitive to over adjustment
- Input indicator is invisible at any distance
- Block type PSUs mean that they aren't quite as compact as expected
Comparisons (according to reviewers)
- The Node Nano is fractionally better doing its own decoding than the Stereo Box E, when the Node Nano is connected via the analogue out against the coax
Takeaway: The Stereo Box E is a sweet and detailed amplifier with impressive phono stage and sufficient output, which makes it a genuinely good piece of affordable two channel hifi. It provides new arrivals the starting point they need to build systems of their own
Video review
Our take on the brand
Pro-Ject Audio Systems, an Austrian brand founded in 1991, has been at the forefront of reestablishing analog music reproduction to the public. The company handcrafts 95% of all components in the European Union. The turntables focus on manual operation and minimalist design with a wide selection of colors that make their turntables both audio devices and stylish furniture pieces. The brand stands out for offering one of the broadest ranges of high-fidelity products in the world, including turntables, CD players, DACs, streamers, phono preamps, amplifiers, and speakers. Pro-Ject products are engineered with a focus on best audio reproduction for the money and omission of costly, unnecessary features.
Product Page
Product Page
Fosi
MC331
129
/
Released
2024
Mini Nostalgic Aesthetics Fosi Audio MC331 Hybrid Tube Integrated Amp Compact size, tube warmth, and remote control: A perfect combination for convenient and cozy audio enjoyment.
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
- Versatile connectivity with Bluetooth, USB, optical, coaxial, and RCA inputs, allowing connection to various audio sources
- Compact size makes it suitable for desktop setups and smaller spaces
- Retro aesthetic design with a VU meter and tube amp, offering visual appeal
- Delivers a warm, smooth sound signature
- Tone controls for adjusting bass and treble
Product Considerations
- Lacks support for LDAC or aptX for Bluetooth audio
- May exhibit background noise with sensitive IEMs (in-ear monitors)
- Some reviewers found the staging—especially with headphones—very collapsed
- The remote did not have the best reach and sensitivity, according to one reviewer
Takeaway: The Fosi Audio MC331 is a multi-functional and visually appealing amp that offers a warm sound and versatile connectivity for an enjoyable listening experience. It is a great option for those looking for a budget-friendly all-in-one audio solution with a vintage touch.
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
MC351
169
/
Released
2024
Equipped with a built-in DAC, the MC351 supports four types of digital inputs. With outputs of passive subwoofer and pre-out, it allows 2.1 system configuration. The inclusion of a circular VU meter adds a touch of vintage aesthetics, providing audio enthusiasts with visual and auditory pleasure.
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 sound quality overall, clean audio, especially considering the price
- Versatile with multiple inputs: Bluetooth, RCA, optical, USB, and coaxial
- Solid build quality with an aluminum casing and weighted knobs
- Aesthetic appeal with a VU meter and orange accents
Product Considerations
- Power output may not match advertised specifications
- Bass and treble controls can be overly sensitive, making fine-tuning difficult
- Unusual placement of bass and treble knobs—treble on the left, bass on the right
- Lack of a remote control
- Passive subwoofer output may not be useful for many users
Takeaway: The MC351 is a versatile and attractive integrated amplifier with good sound quality and a wide range of inputs, making it a great value for users looking for a simple, all-in-one solution. Its solid build and appealing aesthetics add to its overall appeal.
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
T20
107
/
Released
2023
QCC3031 wireless Bluetooth 5.0 core support aptX and aptX-HD, with Bluetooth and AUX selector, delivering 50W RMS X 2 power output. The T20 features 2 x 6A2 tubes for clear audio sound and includes a headphone output for 16-64ohm 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 an all-metal casing
- Compact design and small size
- Good overall sonic performance for its price, delivering a warm and lush sound typical of tube amplifiers
- Independent hardware bass and treble controls
- Bluetooth connectivity with Qualcomm's QCC3031 SoC supporting aptX and aptX-HD codecs
Product Considerations
- The power button doesn't fully turn off the amplifier, leaving the Class D amplifier on
- The Bluetooth and auxiliary input require manual switching
- Bluetooth dropouts may occur with multiple devices connected
- Background might not be the cleanest, a common issue with budget tube amplifiers
- Turning the Bass & Treble Knob too much can create distortion
Comparisons (according to reviewers)
- The T20 emphasizes vocals more, while the Topping T9 Pro allows vocals to drift into the mix
Takeaway: The T20 is an affordable amplifier that provides quality sound and is very user-friendly. It's a compact device that gives an enjoyable listening experience with added control over bass and treble.
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
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