Atoll Electronique IN300 black

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.

Integrated Amplifier-Preamplifier with High-End DAC Board

• Power Wrms/channel:
  • 150 Wrms/8Ω
  • 260 Wrms/4Ω

Capacitors

• Analog stages: Mundorf MKP shielded capacitors.
• Digital stages: Vishay MKP capacitors of high audio quality.

DAC Board

• Converter: AK4490: S/N: 120dB; dynamic range: 120dB.
• DSD: 2.8 MHz and 5.6MHz.
• Up to 24Bits 192 kHz on coaxial and optical inputs.
• XMOS USB converter: XHRA-2HPA
• PCM streams from 16 bits to 32bits up to 384 kHz on USB-B input (asynchronous).

Output Stages

• Dual mono stages with 2 toroidal transformers of 440VA.
• Specific low-consumption power supply (5VA)
• Total capacitance of 12x6800uF with ESR capacitors
• Output stages with very little negative feedback
• Specific stages to avoid current spikes at power-on.
• High-end internal power supply wiring.

Measurements

• Power supply: 880 VA
• Total capacitance: 86,400 μF
• Input impedance: 220 kΩ

Connectivity

• Analog inputs:
  • 5 line inputs (including 1 AUX for optional phono card)
  • 1 BY-PASS input
  • 1 XLR input
• Digital Inputs:
  • 2 Coaxial inputs
  • 2 Optical inputs
• 1 USB-B input:
  • PCM: 32 bits – 384kHz
  • DSD: 2.8MHz/5.6MHz
  • DAC Converter: AKM – AK4490: PCM: 32 bits – 768kHz
  • DSD: 2.8MHz/5.6MHz/11.2MHz
• Outputs:
  • 1 pair of speaker outputs
  • 2 Pre-out outputs
  • 1 6.35mm headphone output
  • 1 12V trigger output
• 1 Bluetooth receiver

General

• Standard remote control
• Dimensions (W x H x D): 440x320x100 mm
• Weight: 15 Kg