Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.
What reviewers think
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
What are hifi reviews useful for? (1) Identifying products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've heard (this means they probably are legitimately great). (3) Identifying a product's attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we often discount what reviewers say because they heap praise on most products—and are often apprehensive about publishing strong criticism or comparisons between products. Further, they seldom have more than a few products on-hand, often relying on their memories to compare past products. Always listen for yourself.
All
Kasa500
reviews
Video Review
Manufacturer details
Features
Specifications
- Colour: Black
- Crossover Frequencies: 40 - 140Hz or software bypass
- Inputs: Selectable stereo RCA line level, or mono LFE RCA level; Stereo speaker level
- 12 Volt Trigger Input Voltage: 8 to 14 Volt [email protected] max ⅛" diameter female plug (tip positive or tip negative)
- Amplifier Power: 2 x 250watts 4ohms; Bridge 1 x 500watts 8ohms (<1% THD)
- Product External Dimension (H X W X D): 88 x 432 x 304mm (3½ x 17 x 12 in.)
- With feet: 92 x 432 x 304mm (3⅝ x 17 x 12 in.)
- With rack ears (2 EIA rack space): 88 x 483 x 304mm (3½ x 19 x 12 in.)
- Weight: 4kg (9 lbs)
Description
KASA500 is a powerful Class-D Dual 250WPC amplifier. This DSP controlled system amplifier is optimized to deliver thunderous bass from KEF Ci subwoofers.
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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:
- KEF's designs prioritize a "Single Apparent Source" through coaxial driver technology, aiming for a coherent soundstage where frequencies appear to originate from a single point, enhancing realism and spatial accuracy.
- The brand incorporates "Metamaterial Absorption Technology (MAT)" into its drivers, utilizing a maze-like structure to absorb unwanted sound waves from the rear of the driver, resulting in cleaner and more defined output.
- They offer a wide range of streaming and connectivity options, with their powered loudspeakers responding to the proprietary KEF Connect app, which delivers multiple streaming services and facilitates setup and customization.
- KEF frequently collaborates with renowned industrial designers to create visually striking products that seamlessly blend into modern living spaces, balancing aesthetic appeal with acoustic performance.
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T Series
- Positioning: The ultra-slim speaker line, designed to complement modern flat-screen TVs with a minimal footprint.
- Description: While delivering a sleek aesthetic, the flat diaphragm driver maintains rigidity and minimizes resonance, providing clean and accurate sound. However, compared to other KEF lines like the Q or R Series, it may offer less depth in bass response due to its slim design.
Q Series
- Positioning: The entry-level range offers versatile speakers suitable for both stereo and home theater setups.
- Description: Features Metamaterial Absorption Technology (MAT) and the 12th generation Uni-Q driver array, delivering detailed and natural sound. While it provides excellent value, it lacks some of the advanced damping and driver technologies found in the higher-end R and Reference Series, which offer more refined sound reproduction.
R Series
- Positioning: Bridges the gap between the entry-level Q Series and the high-end Reference Series, incorporating technologies from the latter to enhance performance.
- Description: Equipped with Metamaterial Absorption Technology (MAT) and the 12th generation Uni-Q driver array, delivers precise and immersive sound. Unlike the Q Series, it includes Shadow Flare technology to reduce cabinet diffraction, resulting in clearer high frequencies.
The Reference
- Positioning: As KEF's high-end line, sets the benchmark for audiophile-grade sound reproduction.
- Description: Incorporating Metamaterial Absorption Technology (MAT) and a 12th generation Uni-Q driver array, offers exceptional clarity and detail. It also features advanced cabinet construction and flexible port technology for cleaner bass compared to the R Series. However, it doesn't achieve the Single Apparent Source configuration found in the Blade Series, which provides even more precise imaging.
Blade Series
- Positioning: Represents KEF's innovative approach to speaker design, featuring the world's first Single Apparent Source loudspeakers.
- Description: With Metamaterial Absorption Technology (MAT) and the 12th generation Uni-Q driver array, delivers coherent and precise sound. Its unique cabinet design minimizes resonances and diffraction, surpassing the traditional enclosures of The Reference Series.
MUON
- Positioning: Stands as KEF's flagship speaker, combining cutting-edge acoustic engineering with avant-garde industrial design.
- Description: Crafted from super-formed aluminum, the rigid structure minimizes vibrations, delivering ultra-wide bandwidth and immersive sound. While it shares the Uni-Q driver array with other KEF models, its exclusive design and limited production make it a collector's item.
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Avg. Product Price
$1,001-$2,500
Used For Sale
574
Available (Scroll Down)
Brand Popularity
1
of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
95
Founding Year
1961
Our take on the brand
KEF's signature Uni-Q technology places the tweeter in the center of the woofer to create a single point source for sound, while their Metamaterial Absorption Technology absorbs 99% of unwanted sound from the rear of the driver. Their Music Integrity Engine corrects timing errors in the speaker crossover, and their Shadow Flare technology reduces diffraction for improved detail and clarity in sound reproduction.
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What if you spend more?
McIntosh
MI502
4500
4500
/
4
Reviews
The MI502 2-Channel Digital Amplifier is a flexible component and welcome addition to a custom installed home audio or home theater system. It delivers world renowned McIntosh sound quality at a rate of 500 Watts into 8 Ohm speakers or 800 Watts into 4 Ohm speakers. It uses highly high-tech closed loop digital switching amplifiers and resilient power supplies that produce performance levels seldom heard in custom install audio. The applications are nearly limitless for how to use the versatile MI502 in your home entertainment system. It can be used to power the front left and right speakers in a home theater; to drive two in-wall subwoofers; a pair of MI502s could drive the three front channels of your in-home cinema plus one subwoofer; or to power a pair of outdoor speakers for when the party makes it way outside. Additionally, a stack of multiple MI502s could be used to power the distributed audio speakers installed throughout your home.
McIntosh is one of the most iconic amplifier brands in the world, recognizable for its signature blue LED displays and distinctive industrial design. With a legacy spanning decades, McIntosh is known to many, even outside the audiophile community, and is sold in both mass-market retailers and specialized hifi stores. Their amplifiers are characterized by a warm, tube-like sound that enriches the midrange and smooths out the overall tonal balance.
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Product Strengths
- Tangible feeling of pure power and speed of delivery
- Clean, neutral performance
- Fulsome, fast, and fun sound
- Thrillingly responsive to the dynamics of a sound mix
- Drive needed to partner floorstanders hungry for power
Product Considerations
- Chassis depth is a considerable 533mm
- Low-end delivery may not be the best compared to some rivals
- Green/blue aesthetic might not be for everyone
Takeaway: The MI502 is a powerful and responsive amplifier suitable for various applications and it looks good. It offers clean and neutral performance, making it a great choice for someone wanting to get a new amplifier.
Video review
Our take on the brand
McIntosh is one of the most iconic amplifier brands in the world, recognizable for its signature blue LED displays and distinctive industrial design. With a legacy spanning decades, McIntosh is known to many, even outside the audiophile community, and is sold in both mass-market retailers and specialized hifi stores. Their amplifiers are characterized by a warm, tube-like sound that enriches the midrange and smooths out the overall tonal balance.
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Audio by Van Alstine
M750
2799
2799
/
4
Reviews
The DVA M750 monoblock power amplifier is a stunningly musical high-fidelity amplifier that is designed to accurately preserve all of the energy of a live listening experience.
Audio by Van Alstine is a direct-to-consumer hifi brand known for its minimalist design philosophy and unique Single Ended Transistor amplifiers that operate in Class A at normal listening levels and switch to Class AB for higher power needs. The company has a long history of modifying classic audio equipment like Dynaco and Hafler, and continues to design and build their USA-made amplifiers with balanced and differential circuit designs that deliver excellent soundstaging at more accessible prices than comparable equipment.
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Product Strengths
- Impressive clarity, tighter bass, and more pinpoint accuracy of instruments in the soundstage compared to the SET 600
- Great dynamic range, definition, and transparency, while maintaining the nuances and details of the original music recording
- Designed to run cooler and last longer
- Relative bargain for its performance level
- Always sounded musical, a presentation which engaged the listener with music rather than calling attention to the gear
Product Considerations
- A pair of amplifiers can provide enough power to damage almost any speaker system if carelessly used
- Tone and timbre were not as rich and voluptuous as the reviewer tends to prefer, there seemed to be less meat on the bone
- One of the five-way speaker binding posts spun when tightening spades, but there were no electrical or other performance issues from that
Comparisons (according to reviewers)
- Compared to Audio by Van Alstine SET 600, the DVA M750 has more power, a quieter presence, more clarity, tighter bass, and even more pinpoint accuracy of instruments in the soundstage
- Compared to Pass Labs XA30.8, the M750s are slightly more intense sounding
Takeaway: The DVA M750 Monoblock is a powerful amplifier with finesse and a large, quiet soundstage presented with exceptional clarity. It delivers a compelling and engaging musical experience.
Video review
Our take on the brand
Audio by Van Alstine is a direct-to-consumer hifi brand known for its minimalist design philosophy and unique Single Ended Transistor amplifiers that operate in Class A at normal listening levels and switch to Class AB for higher power needs. The company has a long history of modifying classic audio equipment like Dynaco and Hafler, and continues to design and build their USA-made amplifiers with balanced and differential circuit designs that deliver excellent soundstaging at more accessible prices than comparable equipment.
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ADCOM
GFA-585se
3799
3799
/
2
Reviews
Enormous power at an affordable price is what this amp is all about. A pure class A/B power unit, driven in parallel to deliver 450 watts/channel into 8 ohms with impeccable quality. While developing the new GFA-585se, every single part was put under the microscope to create a better & upgraded version of what is already considered a great component in audio industry.
ADCOM is a hifi brand that pioneered high-current amplifier designs with their GFA-1 model in 1979, and their Nelson Pass-designed GFA-555 became a milestone in budget amplifiers. The brand caters to audiophiles who prefer physical media, offering features like phono stages for vinyl enthusiasts, while maintaining a trade-in program for older ADCOM gear that reflects their commitment to product longevity.
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Our summary
Product Strengths
- High power output
- Great sound
- Low noise
- Connectivity options
Product Considerations
- Lack of protection circuitry
- Users should never make any changes to input or output connections while the amplifier is turned on
- Under no circumstances should the speaker terminals be short-circuited or either of the speaker terminal(s) be connected to ground
- The storage capacitors inside continue to be 'powered-up' for many minutes after it's turned off
- The Adcom GFA-585se proved to be unstable into a highly reactive load, meaning it is not recommended for use with electrostatic speakers
Takeaway: The Adcom GFA-585se provides a lot of power and great sound for the price. It's a good option for anyone looking for a high-quality amplifier.
Video review
Our take on the brand
ADCOM is a hifi brand that pioneered high-current amplifier designs with their GFA-1 model in 1979, and their Nelson Pass-designed GFA-555 became a milestone in budget amplifiers. The brand caters to audiophiles who prefer physical media, offering features like phono stages for vinyl enthusiasts, while maintaining a trade-in program for older ADCOM gear that reflects their commitment to product longevity.
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NAD
M23
3749
3749
/
13
Reviews
Building on NAD’s long tradition of identifying and developing cutting-edge amplification technology, the M23 HybridDigital Stereo Power Amplifier features Purifi Audio’s Eigentakt™ design, a once-in-a-decade innovation that virtually eliminates harmonic and intermodulation distortion. Noise is inaudible, for a completely black background and exquisite micro-detail. Conservatively rated at 2x200W continuous into 8 ohms and 2x380W into 4 ohms, the M23 can deliver live performance levels through any loudspeaker. With its unique combination of features, performance, and value, the M23 represents the new benchmark for the stereo power amplifier.
NAD Electronics pioneered affordable hifi equipment by focusing on essential features for good sound, with their classic NAD 3020 becoming the best-selling hifi amplifier in history. Their Masters Series features DirectDigital technology, the world's first closed-loop digital amplification that corrects output every 10 nanoseconds.
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Our summary
Product Strengths
- The M23's build quality feels solid and elegant, with impressive small design details
- The sound is striking in its purity and clarity
- It offers up to three levels of gain, switchable on the back panel, to best fit the system
- It provides a clear sound without sounding hard
- It features Purifi Eigentakt Class D amplification, which provides virtually unmeasurable distortion levels
Product Considerations
- The bass is clean but may be perceived as a little on the cool side and not as 'wompy-sounding'
- The M23 is not a forgiving amplifier that makes everything sound sweet and wonderful—it's not for those seeking a soft and mellow sound
- Bridging with speakers below 5 or 6 ohms is not recommended, as the amp will current limit and potentially shut down
- The reviewer found ergonomical challenges using fancy speaker cables in bridged mode due to wide terminal spacing
- The capacitive touch power button can accidentally trigger
Comparisons (according to reviewers)
- Vs Bel Canto C6i: The M23 offered a layer of refinement and better reproduction of the recording space
- Vs Pass XA25: The M23 had more transparent sound and detail, especially in the treble and upper mids, but lacked the organic quality of the XA25
- Vs HiFi Rose RS 520: The M23 sounded cleaner and had better separation/depth, HiFi Rose seemed to have an EQ built-in, emphasizing midrange and bass
- Vs NAD C298: The M23 is more neutral, deals with decay more naturally, and has better casework, making it look high-end
- Vs Anthem M1 monoblock amplifiers: The M23 was slightly more transparent throughout the entire frequency range
- Vs Bryston 4B 3: The Bryston had more grunt but the M23 is more neutral
Takeaway: The NAD M23 is a powerful and precise amplifier that delivers clean and clear sound, making it a great choice for audiophiles who want to hear their music as accurately as possible. It is especially well-suited for those looking to build a high-end system around a quality preamp or DAC.
Video review
Our take on the brand
NAD Electronics pioneered affordable hifi equipment by focusing on essential features for good sound, with their classic NAD 3020 becoming the best-selling hifi amplifier in history. Their Masters Series features DirectDigital technology, the world's first closed-loop digital amplification that corrects output every 10 nanoseconds.
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What competes at this price?
IOTAVX
AVXP 2-840
2381
/
Released
2022
A simple wisdom in the HiFi industry states: Pure power can only be replaced by even more pure power. And when this enormous power is combined with absolute control, even extremely demanding stereo enthusiasts take notice: The IOTAVX AVXP 2-840 enters the stage of luxurious stereo power amplifiers and delivers a merciless 840 watts per channel at 4 ohms. At 8 ohms, it still delivers an impressive 580 watts per channel.
IOTAVX is a hifi brand offering exceptional value through its integrated amplifiers, with its SA3 model delivering top-tier audio under $800 and its SA40 model earning near-perfect review scores.
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Our Summary
Video review
Our take on the brand
IOTAVX is a hifi brand offering exceptional value through its integrated amplifiers, with its SA3 model delivering top-tier audio under $800 and its SA40 model earning near-perfect review scores.
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Galion
TS A75
1495
/
Released
2024
The performance of this amplifier is so good that you will question whether the significantly more expensive amplifier you are currently shopping for is truly better than this one; for those who prefer XLR, the TS A75 comes with both XLR and RCA inputs.
Galion Audio designs amplifiers with truly balanced architecture and tube-like sound characteristics, featuring unique controls for feedback levels and tone adjustments that avoid typical tonal discoloration. Their amplifiers are distinguished by robust power supplies with dual toroidal transformers and the ability to switch between Class A and Class AB modes, which is rare in their price range.
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Our Summary
Product Strengths
- Delivers a tube-like sound, with a warm and musical presentation
- Robust power supply with substantial capacitance (200,000 microfarads) provides good bass control and dynamics
- Transparent and precise sound, with a wide and deep soundstage
- Balanced design with both RCA and XLR inputs, the latter offering a cleaner and more dynamic sound
- Offers excellent value, outperforming other amplifiers in a similar price range
Product Considerations
- Requires a pre-amplifier to control volume
- May exhibit slight transformer noise when close to the unit
- Does not have pop control, requiring caution when plugging/unplugging connections
- Some reviewers found the logo placement slightly off-center and the blue LED power light too bright
- Bass control is not as punchy or defined for some tastes, leaning towards a tube-like bass delivery
Comparisons (according to reviewers)
- The TSA-75 has a different, more flavorful sound signature compared to the Orchard Audio's neutral sound
- The TSA-75 provides superior micro detail, cleanliness, clarity, and stereo imaging, compared to Schiit Audio Vidar 2
- Performance is head-to-head with the Denafrips Thalo, depending on sound preference—the more balanced, snappy presentation of the Thalo, or the more V-shaped sound with greater depth and soundstage of the TSA-75
- The TSA-75 has a distinct sound signature, unlike Emotiva amps
- The TSA-75 outperforms the McIntosh MC275 Mark VI in audiophile performance
Takeaway: The Galion Audio TS A75 is a well-built amplifier that delivers a warm, tube-like sound with good bass and a wide soundstage. It provides excellent value and is a great choice for those looking for a musical and engaging listening experience.
Video review
Our take on the brand
Galion Audio designs amplifiers with truly balanced architecture and tube-like sound characteristics, featuring unique controls for feedback levels and tone adjustments that avoid typical tonal discoloration. Their amplifiers are distinguished by robust power supplies with dual toroidal transformers and the ability to switch between Class A and Class AB modes, which is rare in their price range.
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Schiit
Tyr
1399
/
Released
2022
Tyr is a monstrous, old-skool, crazy heavy, over-the-top mono speaker amplifier. It uses the best of today's and yesterday's technologies to create something totally unique—and It has enough power to run almost anything.
Schiit Audio, an extremely popular direct-to-consumer hifi brand, specializes in entry-level DACs and amps for both headphones and speakers. Through their distinctive, authentic voice and low-price philosophy, they've built a very loyal customer base.
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Our Summary
Product Strengths
- Robust, effortless power with excellent control makes it easy to drive all speakers with authority and deliver a satisfying listening experience.
- Balanced and neutral sound, with a solid low end that prevents it from sounding dull or anemic, while also ensuring it is not too aggressive to cause listening fatigue.
- Excellent timing makes music engaging and foot-tapping, and is particularly impressive with genres such as R&B and soundtracks.
- Built in the USA, it has a 5 year warranty and 15 day satisfaction guarantee
Product Considerations
- Not ideal for listeners seeking a romantic, sweet, and smooth midrange, or those who prefer a very lively sound.
- The amp required careful system matching to achieve its full potential, particularly needing a high-end preamp to unlock greater refinement and resolution.
- Bass performance might be seriously challenged by more modern amplifiers.
- There is a slight differential in gain
Comparisons (according to reviewers)
- Compared to Emotiva A1s, the Tyr has more bass, more clarity in the bass, and is less veiled overall
- Reminiscent of McIntosh 7270—the Tyr gives off similar 'Mac vibes'.
Takeaway:
The Schiit Tyr monoblocks deliver a lot of power and control, making music sound good with a balanced and neutral style. It's a great option for an amplifier that can handle almost any speaker and is versatile.
Video review
Our take on the brand
Schiit Audio, an extremely popular direct-to-consumer hifi brand, specializes in entry-level DACs and amps for both headphones and speakers. Through their distinctive, authentic voice and low-price philosophy, they've built a very loyal customer base.
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Topping
DX9
1299
/
Released
2023
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
- Breathtaking design with curved corners, symmetrical front faceplate, and a glass component revealing internal circuitry
- Powerful headphone amplifier capable of outputting up to 10W at 16Ω and 7W at 32Ω
- Good sound quality, described as clean, detailed, and punchy, with a balanced tonal presentation
- CNC machined aluminum remote control with rubber buttons
- Multiple inputs and outputs, including 6.35mm, 4.4mm, and 4-pin XLR outputs on the front, and optical, coaxial, AES, IIS, USB, and Bluetooth on the back, with RCA and XLR outputs for lineout and preamplifier lineouts
Product Considerations
- Glass top panel gets hotter than the aluminum housing
- The glass panel is a fingerprint magnet and requires cleaning regularly
- No analog line-in to pair the amplifier with 3rd party DACs
- No streaming capability via WiFi or LAN
- Some menu navigation can be cumbersome, requiring cycling through options rather than direct selection
Comparisons (according to reviewers)
- Compared to the Topping A90 and D90 stack, the DX9 has similar inputs, outputs and power, but the stack is more versatile, as the amp and DAC can be used separately— the DX9 has additional coaxial and optical inputs, and the sound is somewhat similar
- Compared to the HIFIMAN EF400, the DX9 has more inputs/outputs and more power, but the EF400 sounds warmer
- Compared to the Topping D90SE, the DX9 sounds more fun, its bass and midrange has more energy and oomph, but the D90SE is more transparent, though ultimately quite flat
- Compared to the AURALiC Altair G2.1, the DX9 sounds cleaner and better separated, with a small reduction in digital hash
Takeaway: The Topping DX9 is a beautiful and powerful all-in-one DAC/amp that offers a clean and detailed sound, making it suitable for both headphone and speaker setups. Its versatility and attractive design make it a compelling option for those seeking a high-quality audio solution.
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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Peachtree
GaN 1
1499
/
Released
2022
The GaN 1 is a 200 watt-per-channel power amplifier designed to be the sole interface between your variable output digital audio device, like a Bluesound NODE, and your speakers. The GaN 1 is a simple, pure and cost-effective audio solution. Connect the GaN 1 to a streamer and a pair of speakers. That's it...no DAC, no preamp and no input switching. The signal path from the music to your speakers is remarkably short and free from artifacts.
Peachtree Audio, a popular entry-level hifi brand, delivers Gallium Nitride (GaN) technology in their amplifiers, making Class D sound more like Class A with a richer midrange.
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Our Summary
Product Strengths
- GANFET transistors switch faster, are more heat resistant, and produce less distortion than MOSFET transistors
- A monstrous 400-watt regulated power supply
- Designed to work specifically with a source with a variable output, be it a silver disc-spinning device or one of today's best yet affordable HD music streamers
- Offers a level of audiophile performance that well exceeds any reasonable expectations that come with the amp's modest price tag
- Offers a super clean minimal setup when paired with the Bluesound Node
Product Considerations
- Has only one digital coaxial input, limiting connectivity options and expansion
- Lacks volume indication on the unit itself, requiring reliance on the source's volume control
- Some reviewers noticed a high-pitched noise coming from early prototypes, which was later fixed by Peachtree
- Isn't the type of amp that makes a poorly recorded song sound better
- Is a non-standard size
Comparisons (according to reviewers)
- Vs Bluesound Power Node: Setup has a much more substantial mid-range, better low-end control, and ever so slightly better speed with rhythmic transient attack
- Vs NAD M10 V2: Is the more dynamically relaxed
- Vs Hegel H190: Reviewers actually preferred the more forward presentation of midrange
Takeaway: The GAN1 is a forward-thinking piece of tech that prioritizes simplicity and sound quality for those who want to just stream music. It provides outstanding value and impressive performance, especially for those looking for a minimalist, high-fidelity system.
Video review
Our take on the brand
Peachtree Audio, a popular entry-level hifi brand, delivers Gallium Nitride (GaN) technology in their amplifiers, making Class D sound more like Class A with a richer midrange.
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