Atoll IN400 Evolution Integrated Amplifier (Black) - DOUGLAS HIFI
Atoll IN400 Evolution Integrated Amplifier (Silver) - DOUGLAS HIFI
Atoll IN400 Evolution Integrated Amplifier (Side) - DOUGLAS HIFI

Atoll

ATOLL IN400 Evolution Integrated Amplifier

$10,495.00
COLOUR
COLOUR: Black

The Atoll range of audio products from France are one of audio's best kept secrets!

They are well designed, well-made and produce a great sound!

The IN400 EVO is an integrated amp-preamp with high musical capacity. The concept is based on technical and aesthetic choices dedicated to optimal musicality. Mechanically, the chassis is made of 2 mm steel, and the front face is 10 mm aluminium, brushed, micro-blasted, and anodized, with high-precision engraving. The side heatsinks are machined from solid aluminium blocks to absorb mechanical vibrations and ensure perfect heat dissipation.

ATOLL IN400 Evolution Integrated Amplifier

The concept of the IN400 Evolution rests on Atoll's aesthetic and technical approach. Dedicated to optimal musicality. In mechanical terms, the chassis is made from 2 mm steel and the front of 10 mm aluminum. Lateral curved heatsinks are manufactured in massive aluminum blocks by a completely unique process. The original design of the cabinet has been studied to best absorb mechanical vibrations and ensure perfect heat dissipation.

Electronic scheme is the result of long hours of updates that helped to optimize its operations and to refine the choice of components. Electric stages are rigorously double mono with a specific attenuator by channel and two ground star differentiated. Each component has been selected by listening and comparison test. The original scheme is optimized to refine the polarization bias currents and feedback.

The ultimate goal is to provide maximum power with as much energy in all registers. It then gets a listen binding wide stereo image and fluidity, natural and harmonic wealth.

CONNECTIVITY

Inputs
2 stereo XLR inputs.
5 Line inputs: AUX or PHONO (optional), CD, TUNER, DVD, TAPE.
1 BY-PASS input.

Outputs

2 Stereo RCA pre-outputs
1 Ø 6.35 mm headphone jack output.
1 12V Trigger output

Various
Possibility of adding DA100 or DA200 digital boards (optional).

  • Front face in 10 mm brushed, micro-blasted and anodised aluminium, with high-precision engraving.
  • Heatsink and buttons in billet aluminium.
  • 2 mm steel frame.
  • One toroïdal transformer: 1050 VA for audio section
  • One transformer: 1.6 VA for control logic.
  • Integral double mono structure:
             – Separate windings for the tracks.
             – 1 attenuator per channel (with switched resistors).
  • Bipolar transistor input stages.
  • Current sources with bipolar transistors and LEDs to ensure perfect voltage stability.
  • Darlington transistor driver stages.
  • Audio stages with perfectly symmetrical structure and very low counter-reaction.
  • Power stages with MOS FET transistors (8 per channel) are rigorously matched.
  • Precise adjustment of the balance and the possibility of memorising it.
  • Possibility of choosing the standby mode: Low consumption or preheating.
  • Configurable button backlighting.
  • High contrast OLED display: ON or OFF mode (after 5 seconds of inaction).
  • ATOLL global remote control delivered as standard.
  • The IN400 Evolution can receive the following optional boards:
              – DAC boards: DA100 and DA200.
              – PHONO boards: P50 and P100 (can be combined with DAC boards).

TECHNICAL DATA

Power: 2×160 W rms / 8Ω – 2×300 W rms / 4Ω
Total of capacitors: 96 680 µF
Bandwidth (-3 dB): 5 Hz – 100 kHz
Rise time: 2 µs
Input impedance: 357 kΩ
Sensitivity: 450 mV
Signal-to-noise ratio: 100 dB
Distortion rate at 1 kHz: 0,05 %
Standby consumption (low consumption): < 0,5 W
Dimensions: 440×370×130 mm
Weight: 19,5 Kg

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