Atoll Electronique IN300 silver

Atoll integrated pre-amplifier from the French brand Atoll

The Atoll Electronique IN300 is a testament to the power of French engineering in the field of high-fidelity audio. This integrated amplifier is renowned for its warm and detailed sound quality, offering a listening experience that is both immersive and precise.

Technical specifications

The IN300 is a stereo integrated class AB amplifier in dual mono, delivering an output power of 2 x 150 W at 8 Ohms, and 260 W at 4 Ohms. It is equipped with two toroidal transformers of 440 VA each, ensuring a robust and stable power supply. The amplifier’s frequency response ranges from 5 Hz to 100 kHz, with a signal-to-noise ratio of 100 dB, guaranteeing clear and detailed sound reproduction.

The IN300 is equipped with an integrated AKM-AK4490 converter, supporting PCM streams from 16 bits to 32 bits up to 384 kHz on the USB-B input (asynchronous), and up to 24 bits 192 kHz on the coaxial and optical inputs. It also supports DSD decoding at 2.8 MHz and 5.6 MHz.

Design and construction

The IN300 stands out for its sleek and minimalist design, with an 8 mm brushed aluminum front panel. Its high-quality construction is evident in its weight of 16 Kg and dimensions of 440×365×103 mm. The amplifier is designed with a dual mono layout, which contributes to its superior audio performance.

Inside, the IN300 uses high-quality components such as Mundorf MKP capacitors in the analog stages and Vishay MKP capacitors in the digital stages. The amplifier also features very low current feedback stages that bring dynamic and natural sound, and very low distortion thanks to a specific control stage of the command transistors.

Audio quality

The IN300 is renowned for its warm yet detailed sound quality. It maintains a tight control over each speaker it is connected to, delivering a neutral, transparent, and realistic midrange. The amplifier’s balanced MOS-FET circuits offer excellent harmonic gradients and have no memory effect, ensuring that current is immediately delivered to your speakers.

Connectivity

The IN300 offers a wide range of connectivity options. It features five line inputs (including one AUX for an optional phono card), a BY-PASS input, and an XLR input. For digital inputs, it includes two coaxial inputs, two optical inputs, a USB-B input, and a Bluetooth receiver.

Usage and features

The IN300 comes with a global remote control, allowing you to easily adjust the volume, select inputs, and control other ATOLL products. The amplifier also features a headphone jack, which automatically cuts off the speaker outputs when a headphone is plugged in.

Key benefits

• High-quality audio performance with a warm yet detailed sound.
• Sleek and minimalist design with a brushed aluminum front panel.
• Wide range of connectivity options, including Bluetooth.
• Dual mono layout for superior audio performance.
• Comes with a global remote control for easy operation.
• Integrated AKM-AK4490 converter supporting high-resolution audio formats.
• Made in France, ensuring high-quality construction and attention to detail.

Technical Specifications

Audio Performance

• Effective power per channel:
  • 150 W RMS at 8 Ω
  • 260 W RMS at 4 Ω
• Input impedance: 220 kΩ

Components

• Capacitors:
  • Analog stages: Shielded MKP Mundorf
  • Digital stages: Audio-grade MKP Vishay
• Power supply: 880 VA
• Total capacity: 86,400 µF

Digital Section

• AK4490 Converter:
  • Signal-to-noise ratio (S/N): 120 dB
  • Dynamic range: 120 dB
• Supported formats:
  • DSD: 2.8 MHz, 5.6 MHz, 11.2 MHz
  • PCM: up to 32-bit / 384 kHz (USB-B)
  • 24-bit / 192 kHz (coaxial and optical inputs)
• USB XMOS Converter: XHRA-2HPA

Architecture

• Dual mono configuration
• 2 toroidal transformers of 440 VA
• Dedicated low-power supply (5 VA)
• Total capacity: 12 × 6,800 µF with low ESR capacitors
• Minimal feedback output stages
• Protection against current surges
• High-end internal power wiring

Connectivity

• Analog inputs:
  • 5 line inputs
  • 1 direct input (bypass)
  • 1 XLR input
• Digital inputs:
  • 2 coaxial
  • 2 optical
  • 1 USB-B
  • 1 Bluetooth receiver
• Outputs:
  • 1 pair of speaker outputs
  • 2 preamp outputs
  • 1 headphone output (6.35 mm)
  • 1 12 V trigger

Physical Characteristics

• Dimensions (W × H × D): 440 × 320 × 100 mm
• Weight: 15 kg
• Remote control included