Atoll IN400 EVO

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.

Front face in 10 mm brushed, micro-blasted and anodised aluminium, high-precision engraving.
Heatsink and buttons in billet aluminium.
2 mm steel frame.
Two toroidal transformers: 1050 VA (audio) + 1.6 VA (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) rigorously matched.
Precise adjustment of the balance, the possibility of memorizing 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 EVO can receive the following optional cards:
– DA100 and DA200.
– P50 and P100.

TECHNICAL DATA:

Power: 2×160 Wrms / 8Ω – 2×300 Wrms / 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