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
- The AMG One communicates the music's inner tension effectively
- It floats a soundstage with a remarkably low noise floor and sterling transparency
- It accurately reflects the sonic character of the associated preamp and front end
- It delivers a spatial impression that most solid-state amps can only dream of
- Transient speed and control were noteworthy
Product Considerations
- On its own, it might be too honest for someone seeking a warm balance and tube-like textural liquidity
- Harmonic textures were somewhat less liquid and rich sounding compared to good tube amps
Comparisons (according to reviewers)
- Vs Quicksilver Audio V4 monoblocks: The AMG One offers far better bass definition and extension, as well as enhanced soundstage transparency and immediacy
Takeaway: The AMG One is an enjoyable amplifier with plenty of power and finesse that makes music sound great. It is a solid-state amp that checks all the important boxes, so it could be worth buying.
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AMG One
reviews
Manufacturer details
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:
- NuPrime's designs incorporate their proprietary Class D amplification techniques, deviating significantly from off-the-shelf modules by using higher switching frequencies and custom-designed circuits.
- They often include a unique Harmonic Generation Circuit, utilizing Class A transistors, to provide a warmer, more tube-like sound in their solid-state designs.
Select products
STA-9
- Positioning: A hybrid Class A+D amplifier offering both stereo and mono operation with a design aimed at delivering warm, tube-like sound at an accessible price point.
- Description: Uses an enhanced even-order harmonic circuit, high switching frequency, and refined linear power supply to produce transparent sound with controlled dynamics. Compared to higher-priced models in the lineup, it provides balanced performance for typical home setups and moderate soundstage needs.
PRA-9X
- Positioning: A fully balanced preamplifier designed for ultra-low distortion and precise phono input processing at an attractive entry-level price.
- Description: Achieves low THD through a specialized audio relay switch and NJR MUSES8820 op-amp circuitry while offering versatile settings for different MM cartridges. Compared to the integrated IA-9X, it emphasizes refined source input quality for users focused on vinyl playback and detailed analog transmission.
IA-9X
- Positioning: An integrated amplifier that combines modern Class-D efficiency with adjustable harmonic generation to allow a choice between a neutral or warmer sound signature.
- Description: Dual-circuit design combines Only Distortion Cancellation with a Harmonic Generation mode, letting users select a sound character that suits diverse musical genres. Compared to the PRA-9X and AMG PRA, it merges amplification and preamplification in one unit.
AMG PRA
- Positioning: A transparent preamplifier that introduces an active low frequency and harmonic gain control feature to enhance bass performance.
- Description: Features a selectable four-stage control that extends low-frequency response without raising overall volume, backed by a fully balanced design and high input impedance. Compared to lower-priced models, it delivers advanced analog source input performance and tone customization.
Evolution STA
- Positioning: A flagship stereo amplifier delivering exceptional distortion cancellation and robust dual-mono performance for demanding audio setups.
- Description: Only Distortion Cancellation (ODC) Class-D design, high switching frequency, and enhanced power supply work together to provide natural sound with superior clarity and controlled dynamics. Compared to the other models in the lineup, it targets users with high expectations for premium sound quality and larger room applications.
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Nuprime
What if you spend more?
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Our summary
Product Strengths
- Sleek and conservative design with a very high quality cabinet
- Calmness to the sound that feels expensive
- Sweet and big sound with a holographic soundstage, absent of any noise
- Flexible input and format options
Product Considerations
- Clumsy user experience, including a slow start-up and an unfriendly remote with tiny buttons
- The software inside feels a bit scruffy, and it includes proven bad ideas, like retaining the preamp volume for each input
- Offers unnecessary options, like swapping the channels
- Lacks useful features, like selectable digital filters and a jitter meter/warning
Comparisons (according to reviewers)
- Vs Eversolo DMP6: The Evolution 2 DAC has a bigger sense of warmth and calmness, with a deeper soundstage and better articulation, the Eversolo appears to sound flat and rather forward in direct comparison with sharper edges, especially noticeable on vocals
Takeaway: The Evolution 2 DAC gives real sound value, hunting that last 5% improvement, which is an improvement in sound quality. Given the price, this can be a very reasonable upgrade to achieve high-end sound.
Video review
Our take on the brand
The Evolution STA offers a breakthrough in distortion reduction (Only Distortion Cancellation) and rivals the Evolution One in sound quality. It is a stereo amplifier with a dual-mono configuration. Rated RMS Power: 230W @ 8 Ohm.
Our summary
Product Strengths
- Sublime bass performance—full-size, unrestrained, rock-solid, full-bodied, weighty, fast, articulate, and nimble
- Superbly neutral midrange—concrete, clean, open, and expressive, without sounding lean or devoid of saturation or harmonics
- Excellent tonal saturation and great texturing, without even a sliver of edge or hardness
- Soundstaging is a surprising strong suit—wide, deep, and room-filling stage with strong focus and depth
- Exceedingly low noise floor and superb resolution of low-level detail
- Connectivity options are available
Product Considerations
- Treble is a bit dry and ever so slightly dark, and not as good as some competitors in an absolute sense
- May lack fluidity compared to some amplifiers
- May be less emotionally captivating with certain delicate music
- Limited macrodynamic reach with challenging speaker loads
Comparisons (according to reviewers)
- The Evolution STA bass is reminiscent of Analog Domain, AVM, and Anthem amplifiers
- The Evolution STA has similar bass and overall solidity to the NuPrime ST-10, but with more linearity, refinement, and low-level detail
- The AMG-STA sounds airier, more refined, and more fluid than the Evolution STA
Takeaway: The NuPrime Evolution STA power amplifier offers a balanced and neutral sound with exceptional bass performance and soundstaging. It's a great amp for those seeking a solid-state amplifier that conveys the music as unedited as possible.
Video review
Our take on the brand
Tomorrow's Hi-Fi, Today
With Evo 150, we've brought your audio past and present into the future. With outstanding Hypex NCore Class D amplification and our class-leading StreamMagic streaming platform on board, all you need to do is add speakers to enjoy superb high-resolution audio quality from one elegant, discreet box.
And thanks to its suite of digital and analogue inputs, as well as its high-quality digital-to-analogue converter, Evo can be the heart of your hi-fi system for years to come.
Evo 150
Easy to Set Up, Easy to Upgrade
It couldn't be simpler. Connect Evo 150 to the mains and to your speakers. Open StreamMagic, connect to the network, then fire up your favourite music streaming service. Pick a tune, press play and adjust the volume to suit. When you're ready, you can dig deeper to set Evo 150 up just how you want it, adding functionality as you go.
Evo 150 playing through the StreamMagic App
StreamMagic App
Our StreamMagic app offers full control of Evo, plus access to the world's most popular and high-resolution music streaming services. It's clear, logical and stable – so Evo will do precisely what you want. Alternatively, you may prefer to use the app of your favourite streaming service. Evo's ready for you to listen whichever way you choose.
Model watches TV with Evo in view
Connectivity to Suit Your Needs
Thanks to its suite of digital and analogue inputs, including a built-in phono stage, Evo can be the heart of your system – add a turntable, say, or EVO CD. Video sources can play too, just connect your TV's HDMI output to Evo's ARC input. No matter where your music comes from, Evo 150's ready for it.
Model listens to Evo via headphones
Bluetooth Convenience. Hi-Res Sound Quality
Often nothing's more convenient than streaming via Bluetooth. Evo takes it to the max with aptX HD Bluetooth, which features wireless, high-definition music streaming from compatible devices – including our Alva turntables. And because Evo also transmits with Bluetooth aptx HD, it's perfect for private listening on compatible Hi-Res wireless headphones.
Evo in a lifestyle setting with a turntable and books
Made By Music
Evo 150 uses the best audio components, such as the ESS SABRE ES9018k2m Reference DAC. And then we bring every one of our 55+ years of audio know-how to bear. The result is a performance that celebrates the talent of musicians and producers – one that retains the original raw emotive power and detail.
Model turns the volume knob on Evo
Complete Control
Evo is intuitive and straightforward to operate, no matter if you're using its supplied remote control, our simple yet thorough StreamMagic app, or its physical controls – including the large dual-concentric dial on the unit's fascia.
Evo on a shelf in a lifestyle setting
Neat and Easy Placement
At 317mm wide, roughly the size of a vinyl album sleeve, Evo will sit neatly where you need it to. But thanks to its award-winning deisgn and all-around good looks, it really deserves to be centre stage.
Model adds a vinyl record to Alva
Great for Record Lovers
If you want to connect a turntable, Evo 150's built-in phono stage makes it perfect for decks with with moving magnet cartridges, but no integral pre-amp. That's on top of Bluetooth compatibility with our own Alva turntables.
Evo CD
A New Life for CD
Available separately, Evo CD is the compact disc transport developed to exclusively partner Evo all-in-one players. It shares the same eye-catching design, is crafted from the same premium materials and is engineered to the same exacting standards. Evo CD extracts every piece of musical detail from your discs, then passes it seamlessly to Evo. Your CD collection is now set to join the hi-fi evolution.
Detail shot
Designed to Thrill, Built to Last
Evo's confident sound, timeless looks and premium materials mean that you've found your new long-term musical partner – bringing pleasure to both your ears and eyes for many years to come.
Product Strengths
- Packs many features into a small frame, offering an 'all-in-one' solution by integrating streaming, DAC, preamp, and amplification
- The sound quality is clear, detailed, smooth, refined, articulate, and neutral, with good soundstage and imaging
- Offers a wide array of input options (analog and digital) and streaming service compatibility, making it versatile
- Its Class D amplification (Hypex NCore) is powerful (150Wpc) and efficient, running cool compared to traditional amps
- The industrial design and aesthetics are highlighted positively, with its sleek look, swappable side panels, and user-friendly interface, enhancing its lifestyle appeal
Product Considerations
- The headphone preamp may not satisfy serious headphone enthusiasts without a dedicated amp
- There is a noted lack of bass management
- The StreamMagic app lags behind the likes of Bluesound and Yamaha MusicCast in terms of its interface
- Some reviewers found a slight softening of the bottom end
- One review notes some power supply noise in bench tests, but at inaudible levels
Comparisons (according to reviewers)
- Offers wider soundstage, depth, and polish than the Naim Uniti Atom, but the Naim Uniti Atom has a greater sense of musicality and tighter rhythmic fabric
Takeaway: The Cambridge Audio Evo 150 is a versatile and attractive all-in-one system with excellent sound quality and a comprehensive feature set, making it a great choice for those seeking a simple yet high-performing audio solution. It provides a streamlined experience without sacrificing sound fidelity.
Video review
Our take on the brand
Product Strengths
- Offers a comprehensive and flexible specification, functioning as a headphone amplifier and streaming preamp
- Produces superb sound quality, described as clear, pure, detailed, dynamic, and musical, without being overly analytical, regardless of genre or recording quality
- Features a well-made, elegant, and attractive design with a beautiful screen for album art and a satisfying volume control
- Supports a comprehensive range of streaming services and digital formats including AirPlay 2, Chromecast, Spotify Connect, Tidal Connect, Qobuz, Bluetooth, UPnP, and Internet Radio, and is Roon Ready
- Intuitive and stable app, especially for those who know what they want to listen to
Product Considerations
- The price is high relative to other headphone amplifiers/DACs on the market
- The front display is not a touchscreen
- Some might prefer a more analytical sound presentation
- The HDMI ARC connection is absent
- The Naim app lacks polish compared to dedicated music apps
Comparisons (according to reviewers)
- Vs Cambridge Audio Evo 150 and NAD M10—the Uniti Atom Headphone Edition is specifically focused on headphone use
- As a headphone amp, it is every bit as good as the Chord Hugo TT2
- Naim puts less of itself into the performance as opposed to McIntosh MHA200
Takeaway: The Uniti Atom Headphone Edition is a great self-contained system for headphone listening, with an easy-to-use interface and a beautiful design. It is a quality product that can be a centerpiece for your home audio.
Video review
Our take on the brand
What competes at this price?
Our Summary
Product Strengths
- Relaxed and intimate sound invites the listener to engage with the recording
- Measured and steady presentation exists, without fuss or obvious coloration
- Tonally neutral, revealing the character of the speakers and sources used
- Realistic soundstage construction exists, with impressive width and precise imaging
- Silent background eliminates extraneous noise
Product Considerations
- May not be the best choice for metal or techno music enthusiasts
- Phono stage requires careful cartridge matching, favoring MM cartridges with higher output
- A higher volume level may be needed to get the same sound level as some other amplifiers
Takeaway: The IA-9X is a great choice for critical listeners who value accuracy and simplicity, especially in smaller rooms or with efficient speakers. With its neutral sound and impressive soundstage, it offers a rewarding and relaxing listening experience.
Video review
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Our Summary
Product Strengths
- Powerful Class A/D stereo power amplifier, with an output of 2x 130Watt at 4 and 8 Ohms
- Can be used as a 'monoblock' to output 1x 330 Watt of 4 and 8 Ohm output power
- Dual-mono construction, with both single-ended RCA input and a balanced XLR input
- Firm grip and well controlled lows
- Trigger input and output automatically switch it on/off when the DAC9-X or a pre-amp is switched on
Product Considerations
- When using two STA-9X power amps in bridged mode, you can't connect the high level input of a subwoofer to the speaker terminals on the amp
- Combining the DAC9-X, STA-9X, and Streamline still results in a slightly bright sound
Takeaway: The STA-9X offers good value for its features and sound quality. With its ability to be bridged for even more power, it is a solution for speakers that need more current.
Video review
Our take on the brand
Our Summary
Product Strengths
- High sound quality for its price
- Fluidity, delicacy, and refinement reminiscent of classic Jeff Rowland amplifiers
- A 30% reduction in MOSFET temperature during high-speed operation exceeding 750kHz, enhancing energy efficiency and ensuring sound stability
- Aerospace-grade ultra-high-precision resistors with a minimal error margin of 1/1000
- A newly developed AC power supply minimizes external radiation noise interference, while a redesigned SMPS power module ensures an ultra-low-noise system power supply for circuits that require low voltages
Product Considerations
- Lacks the ST-10's sonorous ballsiness, nor entirely all of its dynamic impact
- The enhanced realism might not emulate a tube sound
Comparisons (according to reviewers)
- AMG STA-SE narrows the gap between the different sound characteristics of models such as the NuPrime ST-10
- AMG STA-SE improves the tonality and elevates the realism, deeper stereo imaging, tighter bass, more dynamics, and transparency
Takeaway: The AMG STA-SE delivers high sound quality with enhanced precision and detail. It is a true value amplifier that is worth keeping for a long time
Video review
Our take on the brand
Our Summary
Product Strengths
- Delivers a vividly detailed and balanced sound, handling complicated mixes with skill
- Able to extract a lot of information from digital audio files with apparent ease
- A volume lock prevents accidental volume adjustments when the device is in a pocket or bag
- Extensive specification including Bluetooth 5.4 with aptX Lossless compatibility and multiple inputs/outputs for versatile connectivity
Product Considerations
- Some reviewers feel the device is not very pocket-friendly due to its size and sharp edges, making it better suited as a transportable—rather than a truly portable—device
- The gain is set too high, making precise volume control difficult, especially with sensitive IEMs
- Using IEMatch adds output impedance, which can negatively affect the tonal balance and dynamics of some IEMs
- The length of the included USB-C cable is short, making it difficult to position the device on a desk
Comparisons (according to reviewers)
- Compared to the iDSD Diablo 1, the Diablo 2 offers slight sonic improvements and better build quality, but at a higher price
- Compared to the iDSD Signature, the iDSD Signature is considered by some to offer a better result for less money, with a more realistic instrument and vocal timbre, larger soundstage, and customizable features like crossfeed and bass boost
- Compared to the FiiO Q7, the iDSD Diablo 2 has a vivid sound, where the FiiO Q7 has a smooth and wide sound
Takeaway: The iDSD Diablo 2 is a powerful and versatile DAC/amp that enhances headphone listening with its detailed sound and extensive features. It is a good choice for users who want a high-quality audio experience on the go or at their desk.
Video review
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Our Summary
Product Strengths
- Joyful sound signature with detailed output
- Can power a wide range of headphones, due to Ultima technology
- Compact design, stacks perfectly with the Qutest and Huei
- Employs trickle-down Ultima technology to allow delivery of enormous peak current outputs
- Solid build quality using CNC-milled aluminum casework and good heat dissipation
- Connectivity options include headphone and speaker outputs
Product Considerations
- No gain switch for the headphone output
- Default gain level a bit high for sensitive IEMs
- More power limitations with speakers than headphones—best for smaller, efficient speakers or nearfield listening
- Runs hot, requiring good ventilation
- The volume control feels a little wobbly and might be difficult to use in a very precise way, and there is some channel imbalance at very low volumes
Comparisons (according to reviewers)
- Qutest/Anni pairing justifies its price premium thanks to a more composed and insightful presentation that offers notably more low-end authority, dynamic punch and tonal richness
- Cyrus ONE HD is plusher, showing that Anni has strong niche appeal
- The iFi xDSD Gryphon has digital inputs and built-in DAC, while Anni can power speakers
Takeaway: The Chord Electronics Anni is a compact and well-built amplifier that delivers a joyful and detailed sound, making it a great addition to a desktop setup for headphone and nearfield speaker listening. Its use of trickle-down Ultima technology ensures high-quality performance in a small package, and its ability to stack with other Chord devices makes it a good choice for those already invested in the ecosystem.
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