Atoll Electronique AM400 Evolution Power Amplifier

Description

Atoll Electronique AM400 Evolution Power Amplifier

The Atoll Electronique AM400 Evolution Power Amplifier uses four pairs of MOSFET transistors per channel. Its discrete component electronic stages have been redesigned to make the unit insensitive to capacitive loads. Power output is increased to 170 W / 8 Ω, and the signal-to-noise ratio to 105 dB.

High-quality MKP coupling capacitors are shielded, contributing to preserving sonic fidelity. The interconnect cables between the motherboard and the speaker outputs are made of pure, oxygen-free copper, silver-plated with Teflon insulation. The low-series-resistance filter capacitors are custom-made by a world-renowned specialist.

 

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Features

• Front face in 10 mm brushed, micro-bead blasted and anodized aluminum, high-precision engraving.
• 2mm steel chassis.
• Heat sinks machined from solid aluminum.
• 1050 VA toroidal transformer.
• High-quality, shielded MKP coupling capacitors.
• Specific printed circuit board with nickel/gold finish.
• Purely symmetrical processing of the XLR signal.
• Bipolar transistor current sources and LEDs to ensure perfect voltage stability.
• Audio stages reworked to make the device insensitive to capacitive loads.
• Improved signal-to-noise ratio.
• High-quality RCA input/output connectors, screwed to the chassis.
• Tellurium copper speaker outputs.
• 12V Trigger Input.

CONNECTIVITY

Audio inputs:

• 1 stereo XLR input.
• 1 stereo line input.
• 1 12V trigger input.

Audio outputs:

• 1 stereo line output.
• Tellurium copper speaker outputs.

The tellurium copper speaker output terminals were selected for their ability to transmit all the energy and micro-details of the electrical signal without alteration.

The polypropylene film coupling capacitors were chosen by listening tests from the high-end series of leading manufacturers. In bridged mono mode, the energy gain is enormous: this operation is suitable for any system requiring high power.

The differential structure circuit allows this transformation to occur without altering the nuances of musicality; the gain in “sonic substance” makes the listening experience even more realistic.

 

Technical Specifications

• RMS power/channel/8Ω: 170 W
• RMS power/channel/4Ω: 320 W
• Bridged mono power/8Ω: 600 W
• Power supply: 1050 VA
• Total capacitance: 111,300 μF
• Number of stereo inputs: 1 RCA + 1 XLR
• Power consumption (switch off): 0 W
• Power consumption (operating): 14 W – 800 W
• Input impedance: 220 kΩ
• Sensitivity: 1.7 V
• Signal-to-noise ratio: 105 dB
• Distortion at 1 kHz: 0.005%
• Frequency response: 5 Hz – 200 kHz
• Rise time: 1.5 μs
• Dimensions: 440×370×130 mm
• Weight: 19 kg