Norma Audio Revo IPA140 Integrated Amplifier Review
Although I only recently became familiar with Norma Audio, the company has been producing audio equipment for nearly forty years. As part of the Opal Electronics group, which designs and manufactures electronic measuring equipment, Norma Audio draws on a well-established heritage of engineering expertise. This background adds an interesting dimension to the brand and piqued my interest, making me keen to discover how that translates into the performance and musical character of its products.
After receiving the press release from Symphony Distribution, I contacted its owner, Daniel Ragett, to learn more about Norma Audio's UK distribution. I also expressed my interest in reviewing a product from the range, with one of its amplifiers at the top of my list. Having owned numerous integrated amplifiers over the years, and reviewed and tested many more here at The Speaker Shack, I was particularly keen to experience my first example from a renowned Italian manufacturer.
Founded in 1987 by Enrico Rossi, Norma Audio is based in Cremona, northern Italy—a city renowned for its violin-making tradition and its association with celebrated makers such as Stradivari, Amati and Guarneri. Against this rich musical backdrop, Norma Audio carries forward Cremona's passion for music through its beautifully crafted HiFi components. I have always felt that HiFi equipment shares something with a musical instrument: both require careful tuning and refinement to convey the tone, expression, and emotion that bring music to life.
Build Quality and Features
The Revo made an immediate impression, even before I unpacked it. At 25kg, it is a substantial amplifier, and opening the box revealed craftsmanship that matched its reassuring weight. Available in silver or anodised black, with the latter carrying a small premium, the silver version supplied for this review has a beautifully finished aluminium chassis and a sleek, understated appearance.
The front panel is refreshingly uncluttered, with a centrally positioned volume control and a button to the right that handles both power and input selection. Subtle blue indicators identify the selected input without drawing unnecessary attention, while the embossed branding on the left completes the minimalist design.
Around the back, the Revo offers five inputs: four RCA and one balanced XLR. One RCA input can also be configured as an output, adding flexibility to the connections. Optional DAC and MM/MC phono modules are available at an additional cost, allowing owners to expand the amplifier's capabilities. Personally, I prefer the purist approach to an analogue amplifier, with digital conversion and phono duties handled by separate components.
The heatsinks run along the sides of the chassis but are largely concealed by the extended top and bottom panels and taper slightly from front to back. This well-thought-out design detail gives the amplifier a cleaner profile and makes it easier to handle when moving it. The compact aluminium remote is equally well finished, providing all the controls you need while complementing the Revo's understated styling.
Inside, the attention to detail continues. The Revo uses a dual-mono layout, with separate left- and right-channel circuitry and a dedicated 400VA toroidal transformer for each channel. Power output is rated at 140 watts per channel into 8 ohms, doubling to 280 watts into 4 ohms, while peak current delivery reaches up to 150A per channel. These figures suggest considerable power reserves and the ability to maintain control when driving demanding loudspeakers.
The Revo amplifier is beautifully designed, with an elegance that reflects its Italian heritage. While researching Norma Audio, I was unsurprised to learn that Livio Cucuzza contributed to the design of the IPA-140 and the wider Revo range. An exceptionally talented designer, Livio is also known for his work as Chief Design Officer at the Italian loudspeaker manufacturer Sonus faber.
Key Features and Specifications:
Power Output: 140 watts per channel into 8 ohms, doubling to 280 watts per channel into 4 ohms.
Amplification Design: Dual-mono solid-state design utilising 3 pairs of MOSFET transistors per channel (6 total per channel).
Current & Handling: 36 A continuous output current and 150 A peak output current per channel, with 1,500 W peak power handling.
Wide Bandwidth Topology: Extremely low noise with a wide frequency response of 0 Hz to 1.8 MHz (-3 dB, non-filtered).
Power Supply: Dual custom 400 VA toroidal transformers (one for each channel) with independent regulated power supplies for the gain, driver, and output stages.
Filtering Capacity: 72,000 µF total filtering capacity across 12 electrical capacitors per channel (24 capacitors total).
Chassis Construction: Non-magnetic aluminium frame designed to shield sensitive internal components from electromagnetic interference.
Audio Inputs:
4 x stereo RCA line inputs
1 x balanced XLR input
Optional MM/MC (Moving Magnet / Moving Coil) phono module
Optional 24-bit/192 kHz USB type-B DAC (Digital-to-Analog Converter) module
Audio Outputs & Connectivity:
Configurable Pre-Out (passive pre-out, active pre-out), Tape out, and Subwoofer out
Direct AV (Audio-Video / Home Theatre bypass) mode
Gold/palladium relay-controlled input selection
Speaker binding posts compatible with 4 mm banana plugs and spades
Control & Weight:
Includes the NORMA RC-4 remote control with two-speed volume adjustment
Unit weight: 25 kg
Dimensions (H x W x D): 110 x 430 x 365 mm
For this review, I partnered the Revo with my ProAc D2R speakers, which respond particularly well to high-current amplification and deliver impressive bass for a two-way standmount design. CD playback comes courtesy of my Cyrus Audio CD8SE, while my reference Denon DP3000NE turntable handles vinyl duties, with the Whest Audio TWO.2 phono stage feeding the Revo. My LUMIN D2 (connected to the Revo amplifier's XLR inputs) streamer provides access to Qobuz, Tidal, and Spotify, while also connecting to my digital music library stored on various NAS HDDs.
Throughout the system, I am using In-akustik Referenz Micro Air NF404 RCA and XLR interconnects, complemented by LS404 speaker cables, completing the full loom of In-akustik cables. I just reviewed these cables, which you can find HERE.
Sound Quality and Performance
I began my listening with David Gilmour's The Luck and Strange Concerts, a collection of live performances recorded at venues worldwide. Alongside his solo material are some of Pink Floyd's most celebrated tracks. Although the album as a whole is superb, I find myself returning to these classics, whose scale and atmosphere can be particularly impressive live. These performances are no exception. For this review, I am streaming the album in 24-bit/96kHz resolution from my NAS drive through my LUMIN streamer.
The Revo's power and control were immediately apparent in the way it takes command of my ProAc D2R speakers. Bass was exceptionally tight, with impressive weight and authority and excellent transient ability, starting and stopping instantly, which, for relatively compact standmounts, is extremely impressive. Driven by the Revo, the D2Rs sounded considerably larger than their dimensions might suggest—a reminder of just how capable a good two-way standmount can be when paired with a well-matched amplifier.
Track six, "Time", provides an excellent example. From the opening sequence of ringing clocks, the recording conveys a convincing sense of the concert and the atmosphere, with cheers and applause clearly audible within the surrounding space. The soundstage extended generously in both width and depth, while precise instrument placement gave the performance a clear and coherent sound. Gilmour's guitar and vocals were focused centre stage, while the drums delivered visceral power, their impact tangible as the D2Rs energised the room. Throughout, the Revo combined authority and composure with an engaging sense of musicality.
Track 9, Wish You Were Here, sounds magnificent, with Gilmour’s acoustic guitar positioned just to the right of centre in the soundstage. Each note is beautifully textured, creating a moment of pure acoustic bliss before his smooth, expressive vocals enter, accompanied by the crowd singing along. The Revo amplifier captures the atmosphere superbly, conveying the natural character of his voice while presenting an expansive soundstage that evokes the scale of the concert and the arena's ambience.
Instrument separation is excellent, with ample space around each musician, keeping individual performances distinct within the wider presentation. Gilmour’s exceptional musicianship holds my attention throughout, with every guitar note and chord delivered with remarkable clarity and expression. The Revo’s speed and timing are among the best I have heard from an integrated design, combining rhythmic drive with assured control. Even at high listening levels, it remains composed, while quieter playback retains an impressive sense of scale.
Track 11, Between Two Points, features Romany Gilmour on vocals and is another standout performance. Her beautiful, expressive voice takes centre stage in my listening room, with the drums and piano clearly positioned behind her. The Revo conveys both the power and delicacy of her delivery, preserving the emotion that makes this piece so compelling.
At higher listening levels, the performance becomes an immersive listening experience, with Romany’s voice conveying such intimacy and emotion that she seems almost tangible in front of me. David Gilmour’s electric guitar emerges from the left with commanding presence, deepening the intensity of the performance. This remains one of my favourite tracks on the album, and the Revo amplifier captures its emotional depth with an absorbing blend of authority, clarity and finesse.
My next album is Ammonia Avenue by The Alan Parsons Project, whose music has been part of my collection for many years. I own an extensive selection of their recordings in high resolution and recently purchased reissues of several classic albums on both vinyl and CD. Originally released in 1984, Ammonia Avenue has been remastered at Abbey Road Studios, and this edition sounds glorious across the formats I have purchased. Having acquired much of the catalogue, I am now looking forward to another release scheduled for November.
I began with the special-edition red vinyl, and one of my favourite tracks, Pipeline, sounded superb through the Revo amplifier and my ProAc speakers. The presentation was expansive, creating a generously proportioned soundstage in front of me. Positioned to the left, the saxophone combined a beautifully smooth tone with convincing power and presence, while the percussion and brass were delivered with impressive clarity and energy. Throughout, the Revo maintained an engaging, comfortable balance that encouraged me to listen to the entire album.
Switching to the CD edition offered an equally rewarding demonstration of the amplifier’s abilities. Although I preferred the immediacy of the vinyl presentation, the CD sounded excellent, with the Revo conveying the intricate arrangements and musical complexity of this progressive rock classic with confidence.
Track 9, the title track Ammonia Avenue, features Eric Woolfson’s beautifully expressive vocals. Once again, the Norma Audio Revo delivered a wonderfully natural presentation, capturing the character and subtle inflections of his voice. Through my ProAc speakers, the soundstage extended impressively in both width and depth, revealing fine detail while maintaining a cohesive musical picture. This is an exceptionally musical amplifier, handling the complexity of these arrangements with ease and bringing an infectious sense of energy to the performance.
My time with the Norma Audio Revo IPA140 has been immensely enjoyable, and its performance has become increasingly rewarding throughout the review period. Norma Audio recommends at least 200–300 hours of running-in time for the amplifier to reach its full potential, and my listening experience has matched that guidance. As the hours accumulated, the Revo brought an increasingly assured and engaging presentation to my music, making every listening session a pleasure.
The recordings discussed above represent just a few of my personal highlights, but the Revo impressed me across the full range of music I played. Whatever the genre, its combination of authority, refinement and musical expression kept me thoroughly absorbed and eager to revisit more of my collection.
Conclusions and Final Thoughts
The Norma Audio Revo IPA140 is one of the finest, if not best, integrated amplifiers I have had the pleasure of reviewing at The Speaker Shack, regardless of price. Its elegant, understated design houses substantial reserves of power, delivered with a compelling combination of authority, refinement and musicality.
Above all, the Revo makes listening to music deeply rewarding. Its ability to draw me into a performance has turned countless listening sessions into hours of uninterrupted enjoyment, as one album inevitably leads to another. I will certainly miss having this amplifier in my system.
The Speaker Shack awards the Norma Audio Revo IPA140 with the Reference Award and our stamp of approval.
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