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
- Compact size belies its muscular performance and ability to deliver scale and instrumental solidity
- Versatile due to built-in features and options like DAC, phono stage, and headphone amplifier
- Delivers a musically enticing sound quality with a fleshy, accurate, and beguiling midrange response
- Top to bottom audio presentation of a sublime, musically enticing sound quality
- Precise and transparent performance, with particularly good bass and mid-frequency definition
Product Considerations
- Input selection process is a little unconventional and may take getting used to
- Small buttons and font size on the remote control may be difficult to see
- May exhibit a bit of strain on full-scale orchestral crescendos at higher SPLs
- Changing settings for the phono stage and headphone amp requires removing the screws that hold the casing together to get to the dip switches inside
- The ¼" headphone socket is at the rear of the unit, which will take a bit of searching to plug in
Comparisons (according to reviewers)
- HS-IPA1 exhibits a somewhat smoother, fuller midrange and high-frequency response, compared to the Naim Supernait 3
Takeaway: The HS-IPA1 is a versatile integrated amplifier that produces great music, checking a lot of hifi boxes. It is a lovely sounding, compact unit that delivers engaging and dynamic performance.
All
HS-IPA1
reviews

Manufacturer details
- Inputs: 4 RCA (Line)
- Input Impedance RCA: 10 Kohm
- Frequency Response: 0-800 KHz (-3dB non filtered)
- Output Power: 75 W RMS / 8 Ohm – 150W RMS / 4 Ohm (each channel)
- Output Current: 24 A continuous, 100 A peak (each channel)
- Power Supply: 230 V AC / 50 Hz, (100V AC or 115 VAC / 50-60Hz in some countries)
- Dimensions (HxWxD): 126 x 250 x 350 mm
- Weight: 12 Kg
- Headphone Impedance Support: 16 ohm, 50 ohm, 300 ohm and direct drive
- Transformer: 1 toroidal transformer for audio applications, 500 VA
- Gain Sensitivity: 34 dB (55 mV – 1 W / 8 Ohm)
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:
- Norma Audio's design philosophy prioritizes ultra-wideband circuitry reaching up to 2MHz, which they believe enhances circuit speed and the ability to deliver instantaneous current, contributing to a more realistic and complete musical reproduction.
- Norma offers highly customizable integrated amplifiers with modular designs allowing users to add or adjust features like DACs, phono stages, and headphone amplifiers to suit their specific needs and preferences.
Select products
Revo IPA 80:
- Positioning: The entry-level integrated amplifier designed for affordability and compact integration.
- Description: Offers a basic analog design that delivers clear sound suited for small room setups and everyday listening, featuring a straightforward circuit compared to its higher-end siblings. Compared to other models in the lineup, it is ideal for users on a limited budget who prioritize simple functionality over advanced processing or connectivity options.
Revo IPA 140:
- Positioning: A mid-range integrated amplifier that bridges basic performance with enhanced build quality.
- Description: Features improved circuitry that expands the soundstage and refines tonal balance, setting it apart from the entry-level IPA 80.
Revo PA 150:
- Positioning: An entry-level power amplifier offering a clear and reliable amplification solution.
- Description: Uses a simplified design that emphasizes efficient power delivery and lower noise levels, a technological step above the integrated models in basic audio setups.
Revo PA 160 MR:
- Positioning: A higher grade power amplifier tuned for better power handling and refined signal integrity.
- Description: Incorporates enhanced modulation and improved output stages to reduce distortion and improve dynamic range relative to the PA 150, highlighting its more advanced circuitry.
HS IPA1:
- Positioning: A premium integrated amplifier that combines advanced technology with high-end design for top performance.
- Description: Offers superior signal processing and high current delivery enabled by innovative circuit techniques, distinguishing itself from both the basic and mid-range models.
Our take on the brand
Look inside the brand
Our interview with the brand
What are two key technological innovations or strong opinions that differ you from other brands?
What's your approach to customer support?
What are your favorite tracks for showcasing the strength of your products?
What other products pair best with yours?
Used
Norma
What if you spend more?
Product Strengths
- Exceptional build quality
- Detailed and engaging sound signature
- Good tonal balance
- Excellent transparency
Product Considerations
- Can be clinical for some listeners
- High price point
Takeaway: The Norma IPA80 and IPA140 are well-regarded amplifiers. Their detailed and transparent sound is a strength, though it might be perceived as clinical by some.
Video review
Our take on the brand
Enleum was launched as a new brand with the AMP-23R. While our legacy AMP-13R had already been praised all around the world for its performance and unique design, we pushed the boundaries to create the AMP-23R with a new circuit that truly enhances the existing performance. We have drastically improved the PCB circuit board design, chosen new internal components and upgraded our JET2 Bias design. And the reviews and awards are unanimous. The AMP-23R's physical size and footprint may be compact, but with the all new chassis and thermal heatsink design, we've launched a product that's fit for the next generation reference compact amplifier. The unique design is the DNA of our new Enleum Brand and was already awarded the Red Dot Award: Product Design 2021 and iF Design Gold Award 2022. The AMP-23R proudly showcases Enleum's expertise in technology and design.
Our summary
Product Strengths
- Addictive sound signature, unlike any other amp, with otherworldly instrument and voice reproduction
- Delivers serious magic with Fleetwood Deville and Klipsch Heritage speakers, revealing obscure details and creating a massive soundstage
- Dynamics for days
- Combines the qualities of a nice SET amp without the downsides, like noise or tube replacement
- Exceptional build quality and design with high-quality parts
- Only has two RCA inputs, no XLR balanced connections
Product Considerations
- Heavy speaker cables can cause the amp to tilt
- The volume dial functions as a gain dial, which may be different than what some users are accustomed to
- May not be suitable for hard-to-drive speakers in the 85db range that dip into 2–4 ohms
Comparisons (according to reviewers)
- The AMP23R offers more texture, layering, mid-bass, and vocal presence than Nagra INT
- The AMP23R is more organic, ethereal, and dynamic than Kinki Studio EXM1
- It sounds better than the Vinnie Rossi L2iSE, so long as the speakers are easy to drive
- The Enleum has more delicacy and finesse than Pass Labs and Cary Audio
- The AMP23R stacks up with the finest gear such as ampsandsound Bryce monoblocks
- Pass Labs First Watt SIT-3 offers a bit more organic, warmer presentation
Takeaway: The Enleum AMP-23R is a small but mighty integrated amplifier with a unique and addictive sound signature, and it is built with high-quality components. It's a great choice for those with sensitive speakers looking for a reference-quality system in a compact package.
Video review
Our take on the brand
Product Strengths
- Exceptional build quality with a blend of expertly crafted wood and metal, creating a visually striking and durable statement piece
- Dynamic, rich, and effortless sound with excellent detail, texture, and the right amount of tube magic
- Powerful output capable of driving demanding headphones while maintaining clarity and control
- Versatile performance with a variety of headphones (dynamic and planar) due to its output transformer design, often improving sound for warm or neutral headphones
- Value added by its ability to be used as a pre-amplifier in a stereo system
Product Considerations
- Large size and weight (around 15kg) require ample desk space and sturdy furniture
- Generates heat, which could be a concern in warmer environments without adequate ventilation
- Accidental switching of 'On/Off' is possible due to the touch-sensitive bar in the front not being intuitive, so use with care around pets
- Too powerful for some very sensitive IEMs, potentially resulting in overwhelming sound or audible hiss, though this is not the intended design for the amplifier
Comparisons (according to reviewers)
- Vs HIFIMAN Susvara, Envy empowers Susvara's natural presentation while giving it all the dynamics and slam needed
- Vs Cayin HA-300MkII, Envy exhibits more linear mid-to-high frequencies and offers a more transparent sound, while HA-300MkII has a warmer—more engaging midrange
- Vs AURIS Headonia 2A3, Envy performs at the same level, with technically incredibly strong aspects
- Vs Octave V 16, Envy completely demolishes the V 16 when it comes to energy, control, timbre, and resolution
- Vs Ferrum OOR, Envy is more powerful sounding, while also being more detailed with better tonality
Takeaway:
The Felix Audio Envy is a high-end headphone amplifier for audio enthusiasts who want the best quality sound to bring out the magic in their favorite headphones. Its stunning design and versatile performance make it a worthwhile addition to any serious audiophile setup.
Video review
Our take on the brand
Product Strengths
- Combines comprehensive functionality, connectivity and usability with good performance, and elegant design
- Exceptional sound quality is described as refined, muscular, detailed, confident, transparent, and natural
- Easy to use, has a great control app, a remote, and an intuitive interface that removes itself from the system
- Well-built with premium materials, including CNC-machined aluminum casework, finned heat sinks, and a hefty toroidal transformer
- Has a musicality that makes it hard to be objective about, the music flows as you listen and makes you want to repeat
Product Considerations
- Overheating may occur due to undersized heatsinks under demanding conditions
- Naim's speaker connectors may be unique, although banana plugs are an acceptable workaround
- Although a detail performer, it isn't the quietest digital source or imaging performer in the market
Comparisons (according to reviewers)
- Vs Uniti Star: The Nova has a more substantial amplifier section, with greater current delivery and stability into tricky loads
- Vs SuperUniti: The Nova offers a more dynamic, detailed, fluid, and natural sound–with a bigger soundstage
- Vs Chord Electronics CPM2800 MkII: The Nova is closer spiritually to separates like the Chord CPM2800 MkII than to other all-in-one systems
- Vs NAD M10: The Naim Unit Nova has full unwavering control of the entire frequency range, from the deepest chest-thumping bass to the most delicate highs
- Vs Naim Uniti Atom: The Nova has more power to get a good result in bigger rooms, whereas the Atom needs to be in a smaller room
Takeaway: The Naim Uniti Nova is a well-designed and easy-to-use all-in-one system that combines comprehensive functionality with very good sound quality. It's a good choice for those who want a convenient and high-performing audio solution without the complexity of separates.
Video review
Our take on the brand
What competes at this price?
Our Summary
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
Our Summary
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
Our Summary
Product Strengths
- Sonic clarity, detail resolution, and control
- Sturdy build and fine finish with solid casework and nicely damped
- Flexible product offering integrated, pre-amp, or pre-power combo options
- Balanced nature means that no particular genre of music is favored above any other
- Impressively equipped with a wide range of inputs including RCA, XLR, Coax, Optical, USB B, and Bluetooth 5.0 with aptX HD and LDAC
Product Considerations
- Dynamic contrasts could be stronger
- Rhythmic drive could be stronger
- Phono stage a little flat-footed
- The display graphics on the screen can be on the small side to read from across a room
- Treble could be more exciting and dynamic
Comparisons (according to reviewers)
- Vs Audiolab 6000A: Offers better instrumental separation, clarity of guitar strings, and a fuller bass response
- Vs Naim Nait XS3 or Rega Elicit Mk5: Delivers less entertainment and rhythmic drive
Takeaway: The Audiolab 9000A is a capable and flexible amplifier offering sonic clarity and a range of features to slot easily into most systems. It charms and delights, never forcing music onto your ears but always upgrading the sound for great speaker performance.
Video review
Our take on the brand
Our Summary
Product Strengths
- Ground-breakingly different than its predecessor (Elicit-R) and the Elex R, integrating the Athos sound and signature
- Combines musicality with a real sense of propulsion
- Taut, punchy, clear sound with impressive clarity and detail
- Excellent built-in moving magnet phono stage, delivering enjoyable results across various music genres
- Internal DAC is of good quality, sitting comfortably beside the analogue line stages in quality, with lively and punchy character, strong detail levels, and dynamic contrasts
- Lacks USB input or Bluetooth connectivity
Product Considerations
- May run hotter than usual
- Can sound a little bright tonally, requiring careful speaker choice
- Volume control steps on the remote may be too large for precise adjustments
- Functional looking rather than stylish
Comparisons (according to reviewers)
- Vs. Roksan K2: The Elicit MK5 is a brawny amplifier with a full package for the audiophile journey
- Vs. Exposure 3510: The Elicit has a decent headphone option and the MM input, while the Exposure would suit if one already has a decent phono stage and a DAC in place
- Vs. Cambridge Audio Edge NQ / 2 x PA-10: While the Edge / PA-10 setup justifies its higher sticker, the Rega Elicit MK5 has a ballsier take on music
Takeaway: The Rega Elicit MK5 is a well-built amplifier that delivers a detailed, clear, and punchy sound, making music sound great and alive. With its integrated DAC and phono stage, it is ready to be the heart of any great listening setup.
Video review
Our take on the brand
Our Summary
Product Strengths
- Combines the tonal qualities of tubes with the power of solid-state amplification, combining the great aspects of both technologies
- Delivers a clean, detailed, dynamic, and musically insightful sound
- Well-built with high-quality components, including point-to-point wiring in the preamp section
- Includes a headphone amplifier powered by the same internal amp as the speakers, not an op-amp
- Multiple inputs and functions, including home theater bypass, subwoofer output, and tape output
Product Considerations
- Lacks balanced inputs and a pre-amplifier output
- The volume control can be very sensitive at low levels
- Optional MM phono stage requires additional purchase
- Requires good ventilation due to running warm
Comparisons (according to reviewers)
- Versus Cambridge Audio Edge NQ / 2 x Gold Note PA-10 setup, the EVO 300 Hybrid delivers a level of engagement that was captivating, the improvement over the normal setup slightly disconcerting
- Versus Schiit Jotunheim, the PrimaLuna bested it, with a slightly cleaner sound that let a touch more detail through
Takeaway: The PrimaLuna EVO 300 Hybrid offers a balance of tube warmth and solid-state power to give listeners the best of both worlds. Its detailed sound, robust build, and versatility make it a worthwhile addition to any audiophile's system.
Video review
Our take on the brand
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