Atoll PR300 EVO

The Atoll Electronique PR300 EVO (Evolution) is a high-end, fully dual-mono stereo preamplifier designed and hand-built in France. Sitting as the flagship preamplifier in Atoll's Evolution series, it is engineered for audiophiles seeking balanced circuitry, low noise, and clean Class-A sound with modular expandability. Internal Architecture & Audio Stages Dual-Mono, Fully Balanced: The audio stages feature independent symmetrical circuitry for each channel. Discrete Class-A Stages: Utilizes bipolar transistors biased in pure Class-A with a very low feedback rate, paired with shielded MKP link capacitors to preserve micro-dynamics and minimize distortion. Dedicated Power Supplies: Powered by four separate transformers: Two 10 VA toroidal transformers (one dedicated to each audio channel). One 3.2 VA linear transformer for digital audio. One 5 VA low-consumption transformer for the control logic. Total filtering capacitance of 89,000 µF. Volume Attenuation: Employs switched-resistor attenuators per channel for channel tracking, balance precision, and transparency.