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 spacious, full and effortless sound
- Precise linearity with low distortion and high efficiency
- Offers outstanding separation of performers on a very wide—and nicely deep—sound stage
- High damping factor for better control of bass
- High signal to noise ratio that continually offers extremely "black", silent backgrounds
Product Considerations
- May exhibit a leaner upper midrange with less richness
- Some reviewers wished the power output was a bit higher
- Edge sharpness (acutance) of the overall sound image, which is typical of good class D amplifiers
Comparisons (according to reviewers)
- With Kohn speakers, the PS Audio has more bass than the Hegel
- Soundstage with the PS Audio is closer than the Hegel
- The S300 exhibits much better soundstage over the Emerald Physics 100.2SE, with a slightly deeper and wider soundstage
- Overload during some electronic jam is less than heard from the Pass Labs XA30.8 or Bryston 2.5B3
- S300 lacked the epic bass extension and hard-core slam of the MBL
Takeaway: The PS Audio Stellar S300 is a well-built amplifier offering great value, delivering a clean, controlled, and dynamic sound. It is an affordable way to achieve high-end sound and enjoy music more.
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
S300
reviews
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An excellent review of a great product
/
Publisher
/
3/1/2022
An excellent review of a great product
Publisher
/
3/1/2022
Video Review
Manufacturer details
Features
Specifications
- Unit Weight: 13 lbs [5.9 kg]
- Unit Dimensions: 17"W x 3"H x 12"D (13"D w/connectors)
- Shipping Weight: 16.5 lbs [7.5 kg]
- Shipping Dimensions: 22"W x 8"H x 17"D
- Signal Gain: 30.5dB +/-0.5dB
- Input impedance: Unbalanced 50KΩ, Balanced 100KΩ
- Damping factor: 50Hz, 8Ω >1100, 4Ω >550
- Frequency Response: 10Hz – 20KHz +/- 0.5dB, 10Hz – 50KHz +0.1/-3.0dB
- THD&IM: 1KHz, 1W/4Ω <0.02%
- Output Power: 8Ω 140W minimum, 4Ω 300W minimum
- Idle Power Consumption: 13W
Description
From the deepest bass to the warmest, sweetest highs, the Stellar S300 makes any loudspeaker sing and is our most affordable stereo power amplifier ever. Breathe new life into your loudspeakers with the Stellar S300, a full-sized, affordable stereo power amplifier that honors the music and controls your loudspeakers better than you ever imagined possible. The S300 combines the slam, linearity, and toe-tapping pacing of a Class D output stage with the warmth, grace, and rich inner detail of Stellar's Class A Analog Cell.
Breathe new life into your loudspeakers with the Stellar S300, a full-sized, affordable stereo power amplifier that honors the music and controls your loudspeakers better than you ever imagined possible. The S300 combines the slam, linearity, and toe-tapping pacing of a Class D output stage with the warmth, grace, and rich inner detail of Stellar's Class A Analog Cell. The results are nothing short of ground breaking. Liberate a wealth of untapped energy trapped in your media library. Plumb music’s subterranean depths and finally hear the bass your speakers were capable of. Revel in rich layers of fine, full detail. Marvel at the deep, extraordinary, wall-to-wall soundstage. Effortless. Lush. Stellar.
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:
- PS Audio stands apart by employing a hybrid amplifier design, often combining a vacuum tube input stage with a solid-state output stage, seeking to blend the sonic characteristics of both technologies.
- PS Audio products, particularly power regenerators, are designed to actively regenerate AC power, aiming to provide a clean and stable power source that is independent of the quality of the incoming electricity.
- They emphasize a holistic system design and often tune their components by ear, with active involvement from founder Paul McGowan and engineers who focus on achieving a musically engaging sound rather than strictly adhering to measurements.
- A key focus for PS Audio is making high-end audio accessible, often incorporating generous features, a small form factor and technology trickled down from their top tier offerings into value-oriented "gateway drug" products.
Select products
Select product comparisons
Aspen FR5 Loudspeaker
- Positioning: The entry-level model in the Aspen series, ideal for small to medium-sized rooms.
- Description: Offers a compact design with impressive sound quality, featuring a planar magnetic tweeter for clear high frequencies. It stands out with its ability to deliver deep bass in a small form factor, making it suitable for those with limited space and budget. Compared to the larger models, it is more affordable and easier to integrate into smaller setups without sacrificing sound quality.
Aspen FR10 Loudspeaker
- Positioning: A mid-range model in the Aspen series, designed for versatility in various room sizes.
- Description: Features full-range sound and compact size, using planar ribbon technology for both tweeter and midrange. It provides room-filling bass down to 30Hz.
Aspen FR20 Loudspeaker
- Positioning: A high-end model in the Aspen series, offering reference-level performance for medium to large rooms.
- Description: Combines planar ribbon and ultra-linear woofer technologies to deliver low distortion and powerful bass. It is designed to be a true reference loudspeaker, providing a seamless audio experience with a wide frequency range. Compared to the FR30, it offers similar performance at a lower price point.
Aspen FR30 Loudspeaker
- Positioning: The flagship model in the Aspen series, representing the pinnacle of PS Audio's loudspeaker design.
- Description: Features groundbreaking custom-built components, including planar magnetic drivers and multiple woofers, to achieve unparalleled sound quality. It offers a full-range, dynamic audio experience with exceptional clarity and bass response. As the most advanced model, it is best suited for large rooms and those who demand the highest level of performance and are willing to invest in premium audio equipment.
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Avg. Product Price
$500
Used For Sale
122
Available (Scroll Down)
Brand Popularity
31
of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
25
Founding Year
1973
Our take on the brand
PS Audio is a well-known American brand with a strong following among enthusiasts, due in part to the educational YouTube videos produced by its founder. The company offers products across a wide range of categories, each developed with input from top engineers, resulting in unique sonic signatures. PS Audio’s offerings frequently appear on top 10 lists from professional reviewers, with many products recognized for their high-quality performance and innovative design.
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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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What are your favorite tracks for showcasing the strength of your products?
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Used
PS Audio
All of the Brand's Used Products
What if you spend more?
Topping
LA90
799
799
/
10
Reviews
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.
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Our summary
Product Strengths
- Delivers a clean and detailed sound, allowing listeners to hear nuances in recordings
- Offers good instrument separation and imaging
- Has a low noise floor, creating a 'black background' and enhancing the listening experience
- Compact size for an A-B amplifier
- Does not have RCA inputs, requiring XLR or TRS balanced connections
Product Considerations
- May not have enough power for inefficient speakers or large rooms
- External power supply 'brick' is large
- No remote control
Comparisons (according to reviewers)
- The LA90 has a more neutral sound than Cambridge Audio AXA25, which is cleaner and more detailed
- The LA90 comes close to Benchmark AHB2's performance, but does not outperform it in bass impact and soundstage size, and the AHB2 also has more protection systems
- The LA90 offers more vocal clarity and fuller bottom end than Schiit Vidar, but the Vidar is more exciting on top
- Emotiva A1's have more power
Takeaway: The Topping LA-90 Discrete is a small amplifier that produces very clear sound with good detail, making it great for those who already have balanced audio equipment. It could be a nice upgrade for those seeking to hear all the subtleties in their music.
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.
Product Page
Product Page
Topping
LA90 (Discrete)
799
799
/
9
Reviews
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
Product Strengths
- Impressive specs and measurements showcase extremely low noise and distortion
- Clean and transparent sound aims for a neutral reproduction of music
- Compact size and sleek design make it suitable for small spaces
- CNC machined aluminum chassis allows for maximum thermal flow to keep the unit running cool
Product Considerations
- Included external power supply is large and heavy, which can be a challenge to hide
- Power output may be limiting, especially with demanding speakers and for high dynamic range tracks
- Bass performance, while tight and controlled, may lack sub-bass extension and impact for some listeners
- Lack of a remote control limits its convenience as an integrated amplifier
Comparisons (according to reviewers)
- The Discrete version matches the Topping LA90 IC based unit's exemplary performance, but betters it in power handling
- The Topping LA90 comes close to the Benchmark AHB2 in noise floor and detail retrieval, but the AHB2 has more power, impactful bass, and a bigger soundstage
Takeaway: The Topping LA90 is a compact and technically proficient amplifier that delivers a clean and transparent sound and with impressive specs. It is best suited for those with efficient speakers and a preference for accurate sound reproduction without coloration.
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.
Product Page
Product Page
Expand Details
Our summary
Product Strengths
- Bass performance is taut, detailed, and well-dampened
- Delivers a neutral presentation overall
- Has a solid steel chassis and milled aluminum faceplate
- The A1 is able to drive low impedance speakers with power and grandeur
- Produces 200 watts into 8 ohms and 325-350 watts into 4 ohms
- Only has a single line-level RCA-style input
Product Considerations
- Audible tweeter hiss may be present at idle, especially with highly efficient speakers
- High frequencies are not as smooth at the edges, exhibiting just faint traces of grain when listening at above-average levels
Comparisons (according to reviewers)
- Vs Rotel 1592 MkII amp: A1 is notably quieter and more detailed
- Vs Crown XLS Drive Core 2 amps: A1 is equally neutral in tone, has a lower noise floor, and a more consumer-friendly design
- Vs Schiit Vidar: A1 has a larger soundstage
Takeaway: The BasX A1 monoblock amplifier delivers good power and a neutral sound signature. It is a great option for those looking to expand an existing AVR or build a cost-effective hi-fi system.
Video review
Our take on the brand
Emotiva is a direct-to-consumer hifi brand that enables audiophiles to customize their amplifier configurations through a modular "Build Your Own" approach, using their Differential Reference design to minimize noise and distortion.
Product Page
Product Page
Orchard Audio
Starkrimson Mono (Premium)
999
999
/
6
Reviews
Introducing the Starkrimson Mono Premium audio power amplifier – where innovation meets audio excellence. Groundbreaking gallium nitride (GaN) technology has been seamlessly integrated into every aspect of this audio masterpiece. GaN’s efficiency and precision redefine expectations, delivering crystal-clear, distortion-free sound reproduction across the entire frequency spectrum. Crafted with meticulous attention to detail, this amplifier boasts a sleek and modern design that complements any audio setup. The Starkrimson Mono Premium is not just an amplifier; it’s a statement piece that enhances your listening space with both aesthetics and performance. The Starkrimson Mono Premium amplifier provides an immersive journey into the heart of your favorite music. Elevate your audio experience with the pinnacle of GaN technology – the Starkrimson Mono Premium.
Orchard Audio is a direct-to-consumer hifi brand that uses Gallium Nitride (GaN) technology in their Starkrimson amplifiers, which allows for faster switching and less distortion compared to traditional amplifiers. Their compact Starkrimson Mono amplifiers deliver 150 watts per channel with very low noise, and the company provides detailed specifications and measurements that are valued by the audiophile community.
Expand Details
Our summary
Product Strengths
- A very quiet background allows detailed music to emerge clearly
- Plenty of power (150W into 8 Ohms) exhibits good control, speed and dynamics
- GaN (Gallium Nitride) technology is used for efficient power throughput and performance, which shakes the bad reputation of Class D amps
- A neutral sound signature aims to reproduce the recording accurately
- Compact size allows for flexible placement and short speaker cables
- Balanced XLR cable connections are required, RCA connections need a separate adapter (sold by Orchard Audio)
Product Considerations
- Visually, the amps may not appeal to those seeking 'audiophile eye candy'
- A power cable is not included unless specified
- A power indicator light is absent
- In certain system pairings, the sound can be analytical or bright
Comparisons (according to reviewers)
- Starkrimson provides micron-precise separation, while the First Watt F5 thickens things up a touch
- Starkrimson offers more power and benefits from being a monoblock chassis, while the Gold Note IS-10 does not
- Starkrimson offers more power and better control over the bass, as well as speed, compared to the Nakamichi PA-5 Stasis
Takeaway: The Orchard Audio Starkrimson Mono Premium amps deliver power and performance in a small size, and are especially good for audiophiles that seek a neutral sound, lots of detail, and excellent value. These amps could be a great fit for anyone wanting a modern and efficient hifi experience.
Video review
Our take on the brand
Orchard Audio is a direct-to-consumer hifi brand that uses Gallium Nitride (GaN) technology in their Starkrimson amplifiers, which allows for faster switching and less distortion compared to traditional amplifiers. Their compact Starkrimson Mono amplifiers deliver 150 watts per channel with very low noise, and the company provides detailed specifications and measurements that are valued by the audiophile community.
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Product Page
What competes at this price?
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Burson
Funk
491
/
Released
2021
Hi-Fi companies are spoiling headphone enthusiasts with a wide range of choices, but they often overlook near-field audiophiles who listen to speakers in small studios or from their desktops. Instead, near-field audiophiles are left with subpar Class-D amps or active speakers. Alternatively, they have to settle for larger Class-AB amps that disrupt the aesthetic of their setups. The Burson Funk breaks that rule by offering a combination of exceptional performance and a design that fits seamlessly into any living space.
Burson is a hifi brand recognized for its modular op-amp design that allows users to easily swap components to customize their sound signature.
Expand Details
Our Summary
Product Strengths
- Good sound quality, especially in the midrange, leads to vivid and well-formed vocals
- Versatile, it works well with both efficient headphones/IEMs and moderately powered speakers
- Compact design and good build quality, with the chassis acting as a heatsink
- Ability to roll op amps allows users to customize the sound signature
- Ample power for most headphones and nearfield speaker setups
- Only one RCA input, which may be limiting for some users
Product Considerations
- Speaker amplifier power (35-45W) might be insufficient for power-hungry speakers or larger rooms
- The base model op amps are sonically inferior to upgrade options
- Mild turn-off thump present
Comparisons (according to reviewers)
- The Funk has a narrower but deeper soundstage with better imaging and layering than the Arylic A08 Pro
- The Funk has superior imaging, but less potential power output depending on the Arylic's power supply than the Arylic A07/A08 Pro
- The Funk is preferred for desktop speaker setups with Vivid opamps when compared to Schiit Aegir
Takeaway: The Burson Funk is a solid choice for people wanting good sound from both their headphones and speakers in a single, convenient unit. The ability to change the sound by swapping op amps is a welcome feature for those who like to tinker and upgrade.
Video review
Our take on the brand
Burson is a hifi brand recognized for its modular op-amp design that allows users to easily swap components to customize their sound signature.
Product Page
Product Page
Fosi
ZA3
129
/
Released
2023
The next generation balanced dual-mode Class-D power amplifier. Fosi Audio's first amplifier supporting both stereo and mono modes.
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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Our Summary
Product Strengths
- Great value for the money and an attractive price point
- Balanced input and single-ended RCA input
- Op amps are swappable
- Compact form factor
- Versatile with stereo and mono mode
Product Considerations
- The volume control was found to be touchy by some reviewers
- The included power brick is quite large, almost as big as the unit itself
- The binding posts are small
- The RCA input sounds inferior to the XLR input
- The amplifier does not high pass the mains when a subwoofer is plugged in
Comparisons (according to reviewers)
- Vs Fosi Audio V3: ZA3 is considered a more mature version with stylistic elements and new features like balanced inputs and mono mode, with a naturalness in the tonal quality
- Vs SMSL AO200 MKII: AO200 MKII delivers better clarity, definition, and resolution of the sound
Takeaway: The ZA3 is a versatile and compact amplifier that offers great value, especially for those starting their audio journey. Its ability to be used in both stereo and mono configurations and the option to upgrade components make it a flexible choice for various setups.
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
Expand Details
Our Summary
Product Strengths
- Excellent build quality, featuring a CNC milled aluminum chassis and durable construction
- Achromatic Audio Amplifier (AAA) technology by THX, aiming for transparent sound reproduction without coloration
- Relay volume control provides precise channel matching
- Plenty of power to drive a wide range of headphones, from sensitive IEMs to demanding planars
- Balanced XLR inputs and outputs
Product Considerations
- No pre-amp output
- The notched volume control might not be to everyone's liking
- Gets quite warm during use, especially with the SU-9 DAC stacked on top
- Some reviewers noticed a clicking noise when adjusting the volume
- The three-feet design may not be as stable as a four-feet design
Comparisons (according to reviewers)
- Vs. SMSL SP200: Better unit at repelling noise, with a higher signal-to-noise ratio and lower total harmonic distortion—completely solved the SP200's issue with not having a pitch-black background
- Vs. Benchmark HPA4: Very close to the HPA4 in performance, with some minor differences observed only with high-end headphones
Takeaway: The SMSL SH-9 is a well-built and powerful headphone amplifier with a clean, transparent sound. It is a good choice for audiophiles looking for an accurate and detailed listening experience.
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.
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SMSL
HO100
217
/
Released
2022
HO100 Headphone Amplifier features an ultra-low distortion precision feedback circuit with distortion as low as 0.00006%, and an ultra-low noise power supply design that outputs noise as low as 1.3uV.
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
- Budget-friendly headphone amplifier focused on quality
- Robust all-aluminum exterior, with rigid toggle switches, and smooth volume control, giving it the same fit and finish as SMSL's higher-end HO200
- Delivers a clean, neutral, and transparent sound, faithfully reproducing the source audio without adding coloration
- Extremely low noise floor
- Versatile due to its three gain levels (low, mid, high) and its ability to drive both sensitive IEMs and harder-to-drive headphones
Product Considerations
- Lacks balanced and unbalanced outputs for connecting to powered speakers, functioning solely as a headphone amplifier
- Does not have preamp capability
- Reviewers have noted average microdetails
- While the design looks smart and subdued, the tempered glass panel easily grabs fingerprints, requiring frequent cleaning
Comparisons (according to reviewers)
- Vs SMSL HO200: HO100 lacks RCA/XLR outputs and has lower wattage, but is more compact and is preferred if the extra power and outputs are not needed
- Vs FiiO K5 PRO: It has better driving power, a lower noise floor with IEMs, and lower distortion at maximum volume
- Vs JDS Labs Atom+: It has higher maximum power, handles maximum volume better with lower distortion, and offers better overall detail in the micro detail, and a more relaxing signature
Takeaway: The SMSL HO100 is a compact yet powerful headphone amplifier that delivers clean, neutral sound suitable for various headphones. It is well-built and offers excellent value for audiophiles seeking a high-quality listening experience.
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.
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Topping
A90 Discrete
499
/
Released
2022
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
- Very clean, articulate, and detailed sound
- Plenty of power and headroom for difficult headphones
- Includes a remote control, a ground loop switch, and a mini-LED display
- Exceptional build quality
- Good bass and instrument separation
- Includes connectivity options
Product Considerations
- Can sound a bit too bright or lean, potentially sterile with already bright headphones
- Lacks the soundstage depth found in some other discrete designs
- Some reviewers experienced issues with the 6.35mm headphone jack turning off or popping when connecting/disconnecting
- When driving IEMs, enabling the Safe volume mode setting is needed
- Little to no resistance when turning its wheel
Comparisons (according to reviewers)
- The Singer SA-1 is more natural and lifelike for solo piano, while the A90D emphasizes clarity and detail
- The A90D has better bass and instrument separation than the Geshelli Labs balanced E2
- The A90D has more detail and clarity than the HIFIMAN EF-400, but the EF-400 is warmer
- The A90D may have more detail than the Audio-gd Master 9 and R8 combination, but the Audio-gd has a warmer, richer sound and more 3-dimensional soundstage
- It features improved power, dynamics, and a shift from ultra-linear to more fun, colorful, and natural sound than the Topping A90
Takeaway: The Topping A90D is a solid amplifier with clarity, detail, and power that can drive most headphones. It may be worth considering if a clean and articulate sound is desired, especially with warmer headphones, and a preamp with a remote is needed.
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.
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