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
- Operates in Class A (30W) or Class AB (200W), offering flexibility in power output and sound characteristics
- Sound is detailed and open with a wide bandwidth
- Provides excellent control over speakers
- Differentiates well between recordings and masterings
Product Considerations
- Is very heavy at 63 kg, requiring two people to lift
- Treble response might seem a bit 'behind' the sound, potentially described as warmed up
- The unit tends to give off heat, especially when operating in Class A
- Focuses attention on the foreground and can slightly weaken the air between sound sources
Comparisons (according to reviewers)
- Is comparable to the Ayon Audio Spheris III preamplifier and the Soulution 710 power amplifier, despite costing half as much
- Is considered one of the best integrated amplifiers, possibly second only to the Soulution 530
- Is a custom proposition closer to Dan D’Agostino and Kondo, compared to McIntosh, Soulution, or Ancient Audio
Takeaway: The SIA-030 is a powerful and versatile integrated amplifier offering a detailed and open sound. It is well-equipped and provides excellent control over speakers, making it a great choice for audiophiles.
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
SIA-030
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
- Input XLR analogue: 3 (L+R)
- Input RCA analogue: 2 (L+R)
- Input Sensitivity: 2/4/8 V RMS
- Input Impedance: 10KΩ
- Power W RMS (8Ω): ~30W Class A / ~200W Class AB
- Power W RMS (4Ω): ~60W Class A / ~400W Class AB
- Frequency response: +800kHz
- Signal to noise ratio: >120dB @ 1kHz
- THD + noise: <0.01%
- Dimensions (HxWxD): 270mm x 435mm x 500mm/532mm with binding posts
- Weight: 63kg
- Power Consumption Standby: <1W
- Power Consumption Class AB: ~180W
- Power Consumption Class A: ~280W
Description
Creating a component improving upon the much admired SIA-025 was never going to be an easy task. The goal was to design an integrated amplifier that offered that more power and more options, an amp that remained modular, that offered the same elegant looks and the compact chassis of its siblings in the Signature Series. What has been achieved by our engineers is nothing short of astonishing. Every element of this amplifier has been obsessed over and refined to the point of perfection creating the component we present here. A powerhouse of an amplifier in a neat, handsome chassis with optional DAC and phono stage. A truly integrated amplifier for the discerning audiophile looking to preserve space in their listening environment.
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:
- They deliver a sound that is musical and emotional, aiming for an involving experience rather than sterile hi-fidelity.
- Components are often modular in design, constructed with matched transistors and high-quality components and local shunt-regulated power supplies, allowing for interchangeability and future upgrades.
Select products
Select product comparisons
RS-101
- Positioning: Entry-level stereo power amplifier in the Reference Series.
- Description: Offers 300W per channel at 8Ω. Features an intelligent Class A bias for enhanced musical detail, distinguishing it from higher-end models like the SS-025, which offer more power and refinement. This model is ideal for those seeking high performance at a more accessible price point, without the advanced features of the Signature or Masterpiece series.
SS-025
- Positioning: Mid-range stereo power amplifier in the Signature Series.
- Description: Delivers 300W per channel at 8Ω, similar to the RS-101, but with enhanced clarity and musicality due to its design based on the SIA-025 and SM-011. It offers a more refined soundstage compared to the RS-101.
MP-S201
- Positioning: High-end stereo power amplifier in the Masterpiece Series.
- Description: Stands out with its massive 500W per channel at 8Ω, doubling the power of the SS-025, and includes a mono mode for bi-amping. Its superior build quality and power make it ideal for large spaces.
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Avg. Product Price
$40,001-$75,000
Used For Sale
12
Available (Scroll Down)
Brand Popularity
371
of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
21
Founding Year
1995
Our take on the brand
Vitus Audio is a hifi brand that follows a unique "Kaizen" philosophy of continuous improvement in their product development, with their Reference Series paradoxically serving as their entry-level line while maintaining reference-quality standards. Their amplifiers feature distinctive engineering choices, including fixed resistor networks for volume control and fully regulated power supplies for output stages, while their DACs use advanced upsampling technology developed with Anagram Technologies.
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Vitus
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What if you spend more?
Vitus
SM-103 Mk.II
81000
81000
/
1
Reviews
Vitus Audio is a hifi brand that follows a unique "Kaizen" philosophy of continuous improvement in their product development, with their Reference Series paradoxically serving as their entry-level line while maintaining reference-quality standards. Their amplifiers feature distinctive engineering choices, including fixed resistor networks for volume control and fully regulated power supplies for output stages, while their DACs use advanced upsampling technology developed with Anagram Technologies.
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Our summary
Video review
Our take on the brand
Vitus Audio is a hifi brand that follows a unique "Kaizen" philosophy of continuous improvement in their product development, with their Reference Series paradoxically serving as their entry-level line while maintaining reference-quality standards. Their amplifiers feature distinctive engineering choices, including fixed resistor networks for volume control and fully regulated power supplies for output stages, while their DACs use advanced upsampling technology developed with Anagram Technologies.
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Gryphon
Apex
99000
99000
/
7
Reviews
Since its introduction in 2022, Apex has been hailed as the finest power amplifier ever created. Critics and connoisseurs have universally praised its combination of shattering power and sublime delicacy; its ability to drive any loudspeaker balanced with unimpeachable tonal neutrality. It has always been Gryphon’s mission to achieve the highest possible audio performance in terms of sheer musicality, transparency and realism. With Apex Mono and Apex Stereo, Gryphon Audio Designs has elevated pure Class A power amplification a titanic leap above what was previously considered possible. Gryphon Apex takes us several significant steps closer in the quest for the most natural and convincing musical illusion.
Gryphon is one of the most respected high-end amplifier brands in the world. Its bass grip is phenomenal, thanks to an unusually high level of capacitance, which keeps everything tight and controlled, even with demanding speakers. Gryphon is also known for its bold, brutalist design—a look that a lot of people love. You’ll find their gear all over Europe and Asia, and the Diablo 333 is often considered an ‘endgame’ amp by those chasing the very best sound and aesthetics.
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Product Strengths
- Delivers lots of current due to a new 2000VA toroidal transformer
- The Apex Stereo's ease of presentation was immediately obvious—it fully engaged the reviewer
- The amp exuded supreme self-confidence
- The amp simultaneously speeds things up and slows things down
- Superior speaker grip, improving organization, timing, and musical flow
Product Considerations
- Initial start-up can be alarming due to flashing error lights
- The size and weight (445 lbs) can make installation challenging
- It's gigantic and heavy, requiring special equipment and tools to handle its production
Comparisons (according to reviewers)
- Vs Boulder 2060: The Apex revealed more tonally saturated sounds
- Vs Boulder 2060: Apex cast a larger soundstage, and within those huge spaces, images were generally larger and more three-dimensional
- Vs Boulder 2060: Apex exposed more detail in the music
Takeaway: The Gryphon Apex Stereo is a powerful amplifier that brings music to life with a balanced and full sound at any volume. Its ability to reveal the resonant nature of instruments transforms listening sessions into immersive experiences.
Video review
Our take on the brand
Gryphon is one of the most respected high-end amplifier brands in the world. Its bass grip is phenomenal, thanks to an unusually high level of capacitance, which keeps everything tight and controlled, even with demanding speakers. Gryphon is also known for its bold, brutalist design—a look that a lot of people love. You’ll find their gear all over Europe and Asia, and the Diablo 333 is often considered an ‘endgame’ amp by those chasing the very best sound and aesthetics.
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Dan D'Agostino
Momentum M400 MxV
79950
79950
/
4
Reviews
The company's inaugural creation, the Momentum Mono Amplifier, served as the foundation for its product line. The Momentum M400 MxV Mono Amplifier, the latest iteration, enhances the iconic design to new heights. Incorporating techniques and topologies from the Relentless Mono Amplifier, the Momentum M400 MxV models represent the pinnacle of Momentum circuitry evolution. The new model name, MxV, signifies Mass times Velocity—the fundamental equation for Momentum, a recognition that resonates particularly with individuals having a physics background. Explore the cutting-edge Momentum M400 MxV for an unparalleled audio experience.
Dan D'Agostino is an ultra-premium hifi brand distinguished by its unique copper heat sinks with holes and distinctive circular green-lit VU meters that give their amplifiers a steampunk aesthetic. Their amplifiers feature proprietary "Super Rail" technology that maintains high voltage for front-end transistors, while their three-chassis Relentless Preamplifier uses 30-pin interlocking connectors to eliminate wiring anomalies.
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Our summary
Product Strengths
- Exquisite aesthetics with a sleek design and a power meter that glows green
- Delivers a smooth and satisfying sound
- The sound is described as 'louder' and more powerful
- Said to be able to drive any speaker to its maximum output
- Upgrades are retrofittable to earlier Momentum models
- Balanced input only
Product Considerations
- Runs warm
- The scale on the power meter is essentially uncalibrated
- Requires a return to the factory for MxV upgrades on earlier Momentum Models
Comparisons (according to reviewers)
- The Momentum M400 MxV incorporates technology from the Relentless line and gets very close to the Relentless sound regarding space and depth
- The Momentum M400 MxV is smaller and lighter than the Karan Acoustics POWERa mono
- The Momentum M400 MxV is smaller and lighter than the D'Agostino Progression M550 Mono amplifier
Takeaway: The Momentum M400 MxV monoblock is a beautifully designed and powerful amplifier that delivers a smooth and satisfying listening experience. It incorporates technology from the flagship Relentless model, making it a top-tier choice for audiophiles.
Video review
Our take on the brand
Dan D'Agostino is an ultra-premium hifi brand distinguished by its unique copper heat sinks with holes and distinctive circular green-lit VU meters that give their amplifiers a steampunk aesthetic. Their amplifiers feature proprietary "Super Rail" technology that maintains high voltage for front-end transistors, while their three-chassis Relentless Preamplifier uses 30-pin interlocking connectors to eliminate wiring anomalies.
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Audio Research
Reference 330M
90000
90000
/
2
Reviews
Audio Research is a hifi brand that has stayed committed to tube technology while many competitors moved to solid-state designs. The brand is known for its use of KT150 power beam tetrodes and hybrid power supply designs that blend tube amplification with solid-state regulation.
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Product Strengths
- Fully balanced design, handcrafted in the USA
- Employs a sextet of KT170 valves, ECC83, and 6H30, with hand-selected and matched valves
- Features Audio Research's 'Auto-Bias' circuitry and an internal hour meter for monitoring valve usage
- Aesthetically elegant design with unique 'Ghost Meters' which are LED-illuminated and can be dimmed or switched off
- Capable of delivering high power at low frequencies, controlling and driving speakers like a big solid-state amplifier
Product Considerations
- High price point
- Requires a 20A IEC cable (supplied)
- The bass control and sheer bass output of the Gryphon Audio Antileon EVO (solid state) could not quite be matched by the Reference 330M
- The unit use a variable speed fan, although it was essentially silent during testing, this may still present a point of concern for some users
Comparisons (according to reviewers)
- Vs Gryphon Audio Antileon EVO: The Gryphon Audio Antileon EVO (solid state) has slightly better bass control and output
Takeaway: The Audio Research Reference 330M is an intelligently engineered and beautifully styled amplifier that embodies the meaning of 'Reference' in sound quality. Its powerful valve design delivers excellent performance and is sure to be a conversation piece in any high-end audio setup.
Video review
Our take on the brand
Audio Research is a hifi brand that has stayed committed to tube technology while many competitors moved to solid-state designs. The brand is known for its use of KT150 power beam tetrodes and hybrid power supply designs that blend tube amplification with solid-state regulation.
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What competes at this price?
Aavik
I-880
70000
/
Released
2023
The primary development goal of this series was to create a powerful non-switching pure class A amplifier with the lowest possible output impedance that would contribute to a better signal and less noise, thus improving speaker performance, resulting in a much more organic sound and more musicality.
Aavik Acoustics crafts amplifiers using natural composite materials inspired by musical instruments, with their cabinets designed to enhance audio potential. Their products feature unique noise-cancelling technologies including Tesla coils and dither circuitry, while offering distinctive features like their U-300's input-specific gain adjustment system and the U-380's signature "aged-in-wood" bass sound.
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Our Summary
Product Strengths
- Visually stylish, luxurious, well-built, and enjoyable to look at
- Offers extensive functionality including preamp gain adjustment, channel balance, mute, and display brightness settings
- Combines qualities of both tube and transistor designs, having transparency and magical realism with easy power
- Produces a clean, succinct, holographic, and exciting sound, with great dynamic capabilities
- Exceptionally well-balanced frequency response, fitting between the warmth and energetic explicitness of other amps
Product Considerations
- Massive and heavy, making it not easy to move around
- Single ended inputs only with no balanced inputs
- The vast disparity between the damping factors—synergy can vary with speakers
Comparisons (according to reviewers)
- Aavik I-880 was leaner, more illuminated, outlined and energized, spatially grander, less intimate and occupied via shorter key sound sources, compared to Trilogy 915R preamp and twin 995R mono amps
- The I-880 was internally juicy, admirably outlined, enjoyably angry, instantaneous, and powerful in the lower end range, where the twin 995Rs were boomier, fuzzier, slower and sensibly shallower on the very bottom
Takeaway: The Aavik I-880 is a high-performing, visually stunning integrated amplifier that brings music to life with both elegance and power. This amplifier is designed to be a centerpiece, both sonically and aesthetically, in any high-end audio system.
Video review
Our take on the brand
Aavik Acoustics crafts amplifiers using natural composite materials inspired by musical instruments, with their cabinets designed to enhance audio potential. Their products feature unique noise-cancelling technologies including Tesla coils and dither circuitry, while offering distinctive features like their U-300's input-specific gain adjustment system and the U-380's signature "aged-in-wood" bass sound.
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Dan D'Agostino
Momentum MxV
65000
/
Released
2023
Combining the front end technology from the Momentum HD Preamplifier and the power section of the Momentum MxV amplifier, the Momentum MxV Integrated Amplifier delivers Momentum Series performance in a compact framework. The elegant design only hints at the advanced circuitry within its Aluminum and Copper housing.
Dan D'Agostino is an ultra-premium hifi brand distinguished by its unique copper heat sinks with holes and distinctive circular green-lit VU meters that give their amplifiers a steampunk aesthetic. Their amplifiers feature proprietary "Super Rail" technology that maintains high voltage for front-end transistors, while their three-chassis Relentless Preamplifier uses 30-pin interlocking connectors to eliminate wiring anomalies.
Expand Details
Our Summary
Product Strengths
- Strong physical presence and handsome aesthetics, featuring lacquered copper heatsinks, venturi tunnels, and Breguet-style dials.
- MxV upgrades bring significant improvements in core music reproduction areas such as sound stage, detail, and dynamics.
- The Momentum M400MxV sounds 'louder' and more powerful even when set to the same levels as its predecessors.
- The Momentum MxV amplifiers have the ability to bring out the best in loudspeakers
Product Considerations
- The D'Agostino Momentum MxV monoblock is a heavy piece of equipment, weighing 43kg apiece without optional stands.
- The Momentum M400MxV may run warm
- DIP switches for input loading are inside the unit, which requires removing the top cover when switching between cartridges
Comparisons (according to reviewers)
- The Momentum MxV amplifiers bring much of what inspired the larger Relentless Epic 800 and Relentless Epic 1600 to a smaller form factor and price point
- The early Momentum Stereo delivered around half the power of the monoblocks, compared to the Momentum Stereo.
Takeaway: The D'Agostino Momentum MxV amplifiers bring high-end performance in a visually striking package, capable of significantly enhancing the listening experience through improved detail and dynamics. The upgrade path for existing owners also makes it a worthwhile long-term investment.
Video review
Our take on the brand
Dan D'Agostino is an ultra-premium hifi brand distinguished by its unique copper heat sinks with holes and distinctive circular green-lit VU meters that give their amplifiers a steampunk aesthetic. Their amplifiers feature proprietary "Super Rail" technology that maintains high voltage for front-end transistors, while their three-chassis Relentless Preamplifier uses 30-pin interlocking connectors to eliminate wiring anomalies.
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Pathos
InPoL Legacy
55000
/
Released
2022
Pathos introduces the new integrated amplifier with patented InPoL technology: InPoL Legacy. As Heritage was meant to be a tribute to the work of Gianni Borinato, co-founder of Pathos, a heartfelt acknowledgment of his innovations and contributions to the world of audiophiles, similarly InPoL Legacy represents the ideal legacy of Gaetano Zanini, co-founder, and owner of Pathos.
Pathos Acoustics is known for its InPol technology, which combines tube pre-amplification with solid-state amplification to create a distinctive warm yet powerful sound. The brand stands out in the hifi market for its striking visual designs that blend wood and aluminum, while using both tubes and transistors in their amplifiers to achieve their signature sound.
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Our Summary
Product Strengths
- Employs Pathos InPoL Technology/Dual InPoL Circuit, aiming for Pure Class A amplification and a warm, natural sound
- Delivers substantial power: 100 watts per channel into 8 ohms, and 170 watts per channel into 4 ohms
- Uses high-quality components and a power supply based on 1,800 VA toroidal transformers per channel
- Features a tube preamp (using Tun-Sol ECC803 and 6H30 Sovtek tubes) and MOSFETs in the power amplifier
Product Considerations
- The amplifier is large (540 x 800 x 300 mm) and very heavy (100 kg), possibly making it difficult to integrate into standard hifi setups
Takeaway: The InPoL is engineered to deliver a natural sound and substantial power, using high-quality components and a sophisticated design. This could be a compelling option for individuals seeking a high-end amplifier.
Video review
Our take on the brand
Pathos Acoustics is known for its InPol technology, which combines tube pre-amplification with solid-state amplification to create a distinctive warm yet powerful sound. The brand stands out in the hifi market for its striking visual designs that blend wood and aluminum, while using both tubes and transistors in their amplifiers to achieve their signature sound.
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True Life Audio
TSI-300
53700
/
Released
2024
TSI-300 Integrated Amplifier, is a hybrid design, designed to capture the TLA sound and capabilities in a single chassis. 2 Tube preamplifiers driving 2 Solid state power amplifiers. All in one chassis.
True Life Audio (TLA) employs a unique hybrid design in their amplifiers, combining tube and solid-state technologies with custom-designed, hand-wound transformers made in-house. Their Supreme Series features a dual-mono design with separate power supplies for each channel, and they use ultra-wide bandwidth interstage transformers while rejecting signal-path capacitors to achieve a more natural sound.
Expand Details
Our Summary
Product Strengths
- Refined and powerful sound that can compete with the best
- Big and authoritative sound, dynamics, and deep bass
- Natural and lifelike midrange, and a treble that's so extended that it allows you to find the magic in hi-rez digital
- Enormous soundstage in all directions
- Able to play loud without strain, distortion, or compression
- Offers a refined and powerful sound that can compete with the best
- Big and authoritative sound, dynamics, and deep bass
- Able to play loud without strain, distortion, or compression
Product Considerations
- The power receptacle is 20 amps, and a suitable power cord was not included
- Large and heavy amplifier weighing 55 kilos without packing material, so placement needs consideration
Comparisons (according to reviewers)
- Vs Burmester 909 and 088, the True Life Audio TSI-300 did not make singers ten feet tall, like some big systems do, but there was a stronger sense of the sound going far beyond the room boundaries, while the Burmester gear had an unexpected talent for keeping the images and the soundstage confined to a realistic, lifelike size
Takeaway: The True Life Audio TSI-300 seems to do everything it needs to do without compromise, delivering drama and raw emotion. It will appeal to those who love a big and authoritative sound, dynamics, and deep deep bass without sacrificing musicality.
Video review
Our take on the brand
True Life Audio (TLA) employs a unique hybrid design in their amplifiers, combining tube and solid-state technologies with custom-designed, hand-wound transformers made in-house. Their Supreme Series features a dual-mono design with separate power supplies for each channel, and they use ultra-wide bandwidth interstage transformers while rejecting signal-path capacitors to achieve a more natural sound.
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Vinnie Rossi
Brama Integrated
47995
/
Released
2021
With 400 Watts RMS of output power per channel into 4 ohms and unwavering stability into 2 ohms, the Brama Integrated Amplifier's high-current, Class AB lateral MOSFET output stage drives even the most demanding loudspeakers with conviction. What sets our approach apart is how we achieve this power using only 2 matched output devices per rail, effortlessly revealing the subtlest nuances in your music.
Vinnie Rossi is a USA-based hifi brand that pioneers hybrid tube and solid-state designs, with their signature LIO system using ultracapacitor power banks instead of traditional AC power to eliminate noise. Their fully modular LIO system lets users customize their setup with various components like phono stages and DACs, while offering a 10-year warranty that reflects their build quality.
Expand Details
Our Summary
Product Strengths
- The Brama's graceful sound, looks, fit, finish, and feel make it a standout as a complete package, delivering the sonic goods.
- The Brama offers a finely resolved ease to the sound that does not trade resolution for warmth, but rather offers grace and delicacy.
- It is a completely clean, clear silent runner, with absolutely no discernible self-generated interference.
- The Brama's greatest appeal lies in presenting music as a door already open, without obstruction caused by perceived sonic shortcomings.
- It is a master at fluidity, richness without ever sounding overripe, and dynamic impact that feels right as opposed to overcooked.
Product Considerations
- The control knobs get warm to the touch, but that is just aluminum doing its heat dissipation thing.
Comparisons (according to reviewers)
- Using the Brama's pre-out as pre, the Riviera monoblocks turned the rich cornucopia of sounds into a more believably dense and dimensional garden as compared to the Brama as integrated amp.
Takeaway: The Vinnie Rossi Brama Integrated Amplifier offers graceful sound and attractive design, making it a compelling choice. Its effortless purity and full-range reach invite the listener into the music.
Video review
Our take on the brand
Vinnie Rossi is a USA-based hifi brand that pioneers hybrid tube and solid-state designs, with their signature LIO system using ultracapacitor power banks instead of traditional AC power to eliminate noise. Their fully modular LIO system lets users customize their setup with various components like phono stages and DACs, while offering a 10-year warranty that reflects their build quality.
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