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.
All
AVXP 2-840
reviews
Manufacturer details
- Power Output: 580W (8Ω, 2 channels), 840W (4Ω, 2 channels)
- Signal-to-Noise Ratio: 113 dBA
- THD+N: ≤0.015% (Max. Power, 1 kHz)
- Frequency Response (+/-1dB): 10Hz - 35kHz
- Power Supply: 115VAC or 230VAC, @ 50/60Hz (Automatic)
- Buffer Capacity: 160,000µF
- Max Power Consumption: 2,640W
- Standby Power Consumption: <0.5W
- Dimensions (WxHxD): 435 x 183 x 423 (453) mm
- Weight: 30.3 kg
- Inputs: RCA and XLR
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:
Select products
IOTAVX SA3
- Positioning: A compact stereo amplifier designed for wired audio setups for smaller spaces.
- Description: Offers Class AB amplification with a short signal path and integrated digital-to-analog conversion for clear performance, which makes it different from the more power-demanding models in the lineup. Compared to the AVXP and SA40 models, it meets basic connectivity needs at a lower cost, suiting users with moderate budgets and modest room sizes.
IOTAVX AVXP 3-230
- Positioning: A three‐channel surround amplifier intended for home theater environments.
- Description: Delivers 230W per channel with substantial buffering through a high-rated capacitor and ring-core transformer for dynamic performance, a technical edge over simpler stereo models. Compared to the SA3 and full system bundles, it offers dedicated front-channel support and robust power management for users needing enhanced home cinema functionality.
IOTAVX SA40 + PA40 Set
- Positioning: A stereo amplifier and power amplifier set aimed at more demanding listening rooms.
- Description: Pairs a refined preamp with a dedicated power section to provide balanced tonal control and extended connectivity options, setting it apart from basic models. Compared to the SA3 and standalone endstages, it delivers improved build refinement and technical versatility.
IOTAVX AVX17 + 2 x AVXP1 + 14 x AperionAudio XLR Audio Kabel Mono 1m
- Positioning: A high-end surround system bundle tailored for comprehensive home audio installations.
- Description: Integrates a preamplifier with dedicated power modules and high-quality cables, featuring advanced signal handling and low noise design that distinguishes it from simpler setups. Compared to the SA3, AVXP 3-230, and SA40 sets, it offers superior technical sophistication and connectivity options.
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?
I wouldn't break it down to two key technologies, but rather to a general philosophy. With every product, we strive to optimize it for its intended use and omit unnecessary and redundant specifications. This makes the products cheaper, saves us licensing costs, and makes them less prone to errors. Take our AVX17 preamplifier as an example, which has no network, no streaming, no radio, and no DSP simulations. These are all features that are already present in another device or are never used. In return, you get good sound and picture and parametric EQs per channel, so that every customer can adjust the device to best suit themselves and their room. And the preamplifier costs "only" 1799€ and not several thousand euros.
What's your approach to customer support?
We try to provide support in the same way that we would expect from other companies. (When we shop as a private individual.) Always try to answer every email as quickly as possible (usually max 24 hours) on a business day. We are also always easy to reach by phone, and if not, we always try to call you back as quickly as possible.
First, contact the dealer/distributor. If the dealer can't help directly, we'll help either through the dealer or by contacting the customer directly.
From what we've heard from many customers, we're different to others in that we try to offer very quick and straightforward solutions. Even if the warranty has expired, anyone can contact us, and we've always found a customer-oriented solution.
What are your favorite tracks for showcasing the strength of your products?
- Keep the Wolves Away - Uncle Lucius
- The Curse - Agnes Obel
- Bungee Jump - Captain Hook
We also have an official IOTAVX playlist on Qobuz.
What other products pair best with yours?
Generally, our products can be paired with virtually any product thanks to their neutral/natural sound. We use speakers from AperionAudio (US) and BuchardtAudio (Denmark) at trade fairs and for demonstrations in our showroom.
Used
IOTAVX
What if you spend more?
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.
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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
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.
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
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.
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
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.
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
What competes at this price?
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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
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
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
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
Our Summary
Product Strengths
- Clean and clear music with a very dead black background, allowing the music to breathe and swell naturally
- Very firm and deep bass response, sounding incredibly powerful
- Delivers a muscular sense of control over musical dynamics and instrumental transients, confirming an abundance of reserve power
- Accurate and transparent sound, reflecting changes in equipment and cables
- Sound signature similar to a really good class AB or class A amplifier, with natural and transparent sound and very good power and control
Product Considerations
- Some users may find the lack of an on/off light and remote control disconcerting
- At 105 dB range, the bass control gets weaker and the bass gets less pronounced
- Synergy-wise, it does not work well with R2R pre-stages
- Some found it a little less dynamic and a little too soft, but still good and engaging
- Needs to be powered on only when something is plugged into the outputs to avoid damage
Comparisons (according to reviewers)
- Vs Starke Sound ZA3s: Starkrimson is the next step above in clarity and power for home theater applications
- Vs SMSL A10A: There was an immediate change in soundstage and clarity when Starkrimson replaced the SMSL
- Vs Peachtree Nova: Starkrimson offered a riveting sound presentation, as opposed to the Peachtree Nova, which was less bold, but somewhat more nuanced
- Vs Class AB amp up to $3,000: Starkrimson has better noise control, accuracy, and transparency
Takeaway: The Starke Sound amplifier is a simple unit which produces a clean sound, with good detail and power. This amplifier is a great choice for audiophiles looking for a high-quality listening experience.
Video review
Our take on the brand
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