Detailed Presentation of the Atoll IN400 Evolution Integrated Amplifier
The IN400 Evolution boasts a modern and refined look that will seamlessly blend into your interior. Its front panel, made of 10 mm thick brushed aluminum, micro-beaded and anodized, is adorned with high-precision engraving for an impeccable finish. The side heat sinks and buttons are machined from solid aluminum blocks, ensuring excellent thermal dissipation and effective absorption of mechanical vibrations. The 2 mm steel chassis provides the unit with great robustness and unwavering stability.
Advanced Technical Design for Exceptional Performance
Beneath its elegant exterior, the IN400 Evolution conceals sophisticated electronics designed to deliver top-tier sound reproduction. It is equipped with two toroidal transformers, one 1050 VA dedicated to the audio section and one 1.6 VA for control logic. Its fully dual mono structure includes separate windings for each channel and a switched resistor attenuator per channel.
The bipolar transistor input stages and LED current sources ensure high voltage stability. The Darlington transistor driver stages and rigorously matched MOSFET power transistors provide linear and musical amplification with very low feedback. The current mirror voltage regulation makes the preamplification and driver stages insensitive to mains variations.
Comprehensive Connectivity for Easy System Integration
The IN400 Evolution offers numerous connection possibilities to adapt to all configurations. It features two balanced XLR inputs and five RCA line inputs, one of which is optionally configurable as Phono MM. A Bypass input allows integration into a Home Theater system.
Optionally, a DA200 digital card can be added, including two optical and coaxial inputs at 24 bits / 192 kHz, an asynchronous USB input at 24 bits / 192 kHz, and even a Bluetooth input. On the output side, there is a 12V trigger to control other devices.
Powerful Amplification and Generous Bass
With its 2 x 160 W at 8 Ω and 2 x 300 W at 4 ohms, the IN400 Evolution delivers substantial power capable of fully exploiting the potential of your speakers. Its energy reserve of 96,680 µF allows it to respond instantly to the high current demands of the fastest transients.
The extended bandwidth from 5 Hz to 100 kHz at -3 dB allows for deep and articulated bass reproduction, providing a full and generous sound that fills the space. The ultra-fast rise time of 2 µs ensures great responsiveness for a dynamic and rhythmic rendering.
High-Fidelity Sound with Great Musicality
Beyond the numbers, it is in listening that the IN400 Evolution reveals its full potential. Transparency, dynamics, harmonic richness, the Atoll unfolds a sound palette of rare intensity that enhances your favorite recordings.
The soundstage, wide and deep, extends well beyond the speakers with millimetric precision. Each instrument, each voice is perfectly localized with striking realism. The bass is both fast, tight, and nuanced. The midrange, highly neutral, reproduces all the subtleties of timbres with disturbing accuracy. The treble, soft and crystalline, stretches far without ever being aggressive.
A Refined Ergonomics for Everyday Comfort
The IN400 Evolution is as pleasant to use daily as it is to listen to. Its high-contrast OLED display, with adjustable backlighting, offers excellent readability. The included remote control, simple and intuitive, allows you to manage all essential functions.
Precise balance adjustment is possible, with memory for the setting. The standby mode can be configured between low consumption (< 0.5 W) and preheating of the stages. Even the button backlighting can be customized. Atoll has thought of everything to make this integrated amplifier a model of ergonomics.
A Versatile Integrated Amplifier Built for the Future
With its reworked amplification stage for better signal stability and its dynamic bias system making it insensitive to power variations, the IN400 Evolution represents a significant evolution compared to its predecessor, the IN400 Signature.
Its modular design, allowing for the addition of an optional digital card, makes it an upgradable amplifier capable of adapting to future uses. Whether you are a seasoned audiophile or simply seeking quality sound for your home, the Atoll IN400 Evolution will meet your expectations with its captivating musicality and versatility.
What are the main advantages of the IN400 Evolution compared to a classic integrated amplifier?
The IN400 Evolution stands out with its high-end design combining robustness, performance, and musicality. Its dual mono structure, high-quality component stages, and oversized power supply provide unparalleled transparency and dynamism. Its comprehensive connectivity and modularity make it a versatile device, capable of integrating into any Hi-Fi system.
Is this amplifier difficult to install and use daily?
Despite its performance and technicality, the IN400 Evolution remains very easy to handle thanks to its refined ergonomics. The connections are intuitive, and the remote control allows easy access to all usual functions. Additionally, many settings like balance or backlighting are customizable to suit your preferences.
What types of speakers can be paired with the IN400 Evolution?
With its generous power and deep, articulated bass, the IN400 Evolution pairs well with both floor-standing speakers and bookshelf or medium to large monitors. Its output impedance and current reserve allow it to accommodate a wide range of loads, from the easiest to the most complex.
Is the IN400 Evolution suitable for Home Theater use?
Yes, the IN400 Evolution can be perfectly integrated into a high-end Home Theater system thanks to its Bypass input, which bypasses the preamplifier. It can thus be controlled by the A/V processor and focus on amplifying the front channels. Its great dynamics and extended bandwidth are valuable assets for fully enjoying the most spectacular soundtracks.
What digital sources can be connected to it?
By adding the optional DA200 card, the IN400 Evolution opens up to the digital world with two optical inputs, two coaxial inputs, a USB input, and even a Bluetooth input. This allows you to connect most current sources such as a CD player, a streamer, a computer, a TV box, or even a smartphone. The converter integrated into the DA200 card can process PCM streams up to 24 bits / 192 kHz.
