Atoll Electronique IN300 Evolution black

Stereo Integrated Amplifier: Atoll IN300 Evolution

The Atoll IN300 Evolution is a stereo integrated amplifier that embodies the expertise of the French brand, renowned for its quality engineering, balanced power, and versatility. As the successor to the IN300 Signature, this model offers notable improvements, particularly in power supply, features, and modularity, while maintaining the technical standards that have built Atoll amplifiers’ reputation.

True Dual Mono Architecture

At the heart of the IN300 Evolution lies a genuine dual mono amplifier architecture. Two hefty 440 VA toroidal transformers independently power the left and right audio stages, while a dedicated 10 VA digital transformer handles the digital circuits. This design ensures optimal channel separation and robust power delivery, guaranteeing a wide soundstage and breathtaking dynamics.

High-Quality Components for Musical Transparency

Atoll Electronique has handpicked premium components for the IN300 Evolution. The twelve 6800 μF filter capacitors are of high quality and feature low equivalent series resistance (ESR). The MKP coupling capacitors are also high-grade and shielded. These choices ensure great signal transparency and faithful reproduction of the finest details.

Powerful Amplification and Absolute Speaker Control

With 2x150 Wrms into 8 ohms, the IN300 Evolution can effortlessly drive a wide variety of speakers. Its triple push-pull MOS-FET output stage, biased in class A/B, delivers generous current while maintaining low distortion. Thanks to this firm control, speakers are driven with precision, reproducing all the dynamics and nuances of the music.

Comprehensive Connectivity for Easy Integration

The IN300 Evolution offers generous connectivity for easy integration into any hi-fi system. It features 5 line inputs, one of which can be configured as a phono input with the addition of an optional board, as well as an XLR input for balanced sources. A BY-PASS input allows integration into a home theater system.

Enhanced User Comfort with Thoughtful Features

Atoll Electronique has equipped the IN300 Evolution with practical features for an optimal user experience. Balance control can be memorized, making it easy to compensate for acoustic imbalances. Inputs can be renamed for easy identification. The high-contrast OLED display can be set to always-on or auto-off mode. Finally, the included universal remote provides full control of the amplifier from your armchair.

Upgrade Options to Suit Your Needs

The IN300 Evolution is designed to evolve with your needs. It can accommodate optional DA100 and DA200 boards to add extra digital inputs, as well as P50 and P100 phono boards for compatibility with MM and MC turntables. This modularity makes the IN300 Evolution a future-proof amplifier, able to adapt as your system grows.

Intelligent Operation for Controlled Power Consumption

With environmental concerns in mind, Atoll Electronique has equipped the IN300 Evolution with intelligent standby modes. The low-power mode keeps consumption below 0.5 W, while the preheating mode, with adjustable standby time, keeps the power stages at optimal temperature. On startup, a progressive power-up stage avoids consumption spikes. In operation, power consumption ranges from 29 W to 700 W depending on listening level.

Top-Tier Electronic Performance

The IN300 Evolution boasts outstanding technical specifications. With an input impedance of 220 kΩ, a maximum input level of 3.5 Vrms, and a sensitivity of 450 mV, it easily interfaces with a wide range of sources. Its signal-to-noise ratio of 100 dB and distortion of just 0.05% at 1 kHz (10 W) attest to its high linearity. Its wide bandwidth from 5 Hz to 100 kHz and fast rise time of 2.0 μs ensure full reproduction of the musical message.

Technical Specifications

Power Supply and Electrical Management

• Transformers:
  • 2 × 440 VA (audio stages)
  • 1 × 10 VA (digital stages)
• Soft start anti-surge system
• Absolue Créations power cable
• Capacitors:
  • 12 × 6,800 µF high-quality, low equivalent series resistance (ESR) Atoll
  • Total capacity: 86,150 µF
• Current sources with bipolar transistors and light-emitting diodes (LEDs)
• Standby mode: low consumption or preheating

Design and Materials

• Front panel: 8 mm brushed aluminum
• Chassis: 2 mm steel
• Double-sided printed circuit boards with nickel/gold finish

User Interface

• High-contrast organic light-emitting diode (OLED) display (permanent mode or 5 s auto-off)
• Balance adjustment and memory
• Customizable input names
• Atoll remote control included

Audio Performance

• Effective power/channel: 150 W (8 Ω), 260 W (4 Ω)
• Input impedance: 220 kΩ
• Maximum input level: 3.5 V effective
• Sensitivity: 540 mV
• Signal-to-noise ratio: 100 dB
• Distortion (1 kHz): 0.05% (10 W)
• Frequency response: 5 Hz - 100 kHz
• Rise time: 2.0 µs

Output Stages

• Dual mono architecture
• Triple push-pull with metal-oxide-semiconductor field-effect transistors (MOSFET)
• Class A/B biasing
• Minimal feedback
• Anti-surge protection

Input Stages

• High-quality shielded metallized polypropylene (MKP) capacitors
• Shielded Mundorf metallized polypropylene (MKP) capacitors
• Dual volume attenuator (1 per channel)
• Symmetrical stages with bipolar transistors

Connectivity

Analog Inputs

• 5 line inputs (including 1 auxiliary)
• 1 bypass input
• 1 balanced input (XLR)

Outputs

• 1 pair of speaker outputs
• 2 preamplified outputs
• 1 headphone output (6.35 mm)
• 1 12 V trigger

General Characteristics

• Power consumption:
  • Off: 0 W
  • Low standby: < 0.5 W
  • Preheating: 27 W
  • Operation: 29-700 W
• Dimensions: 440 × 365 × 103 mm
• Weight: 16 kg

Available Options

Digital-to-Analog Converter (DAC) Card - DAC200

• AKM-AK4490 converter
• Signal-to-noise ratio: 120 dB
• Formats: DSD 2.8/5.6 MHz, PCM 16-32 bits / 384 kHz (USB), PCM 24 bits / 192 kHz (coaxial/optical)
• XMOS XUF208 USB interface with Atoll firmware

Phono Card

• P100 (configurable moving magnet/moving coil cartridge) (MM/MC)
• P50 (moving magnet cartridge) (MM)