Introduction

The C-2900 is Accuphase’s flagship digital preamplifier and line stage, designed to bring supreme resolution and musicality to both analogue and digital sources. Featuring a fully balanced AAVA™ volume-control architecture and state-of-the-art DAC stage, it delivers effortless dynamics, ultra-low noise, and a seamless integration of all your components.

Design

Built on a robust, low-resonance aluminum chassis, the C-2900 separates its analogue and digital power supplies to prevent crosstalk and interference. Its dual-mono signal paths ensure perfect channel separation. Volume adjustment is handled by Accuphase’s patented AAVA™ (Accuphase Analog Vari-gain Amplifier) system, which varies gain without inserting passive attenuators into the audio path—preserving every nuance even at low listening levels.

Application

As the centerpiece of a modern high-end system, the C-2900 accepts up to seven digital and three analogue inputs, lets you switch effortlessly between them, and feeds any power amplifier or active speaker with pristine, balanced output. Its flexible architecture also supports direct connection to recording devices or DAWs, making it equally at home in mastering and critical-listening environments.

Technology Overview

• AAVA™ Volume Control
  A revolutionary analogue vari-gain circuit that maintains a pure, capacitor-free signal path and perfect channel matching at all volume settings.
• High-Performance DAC Section
  Four parallel DAC channels per channel deliver high linearity and ultra-low distortion. A choice of digital-filter characteristics allows you to tailor time-domain or frequency-response behavior to your preference.
• Separate Power Supplies
  Independent, toroidal-transformer supplies for digital processing and analogue output stages eliminate ground-loop noise and ensure rock-steady operation.
• Fully Balanced Signal Path
  XLR-only analogue outputs and inputs minimize common-mode noise, while digital inputs are galvanically isolated for perfect integrity.

Key Features

• AAVA™ analogue vari-gain volume control
• Four parallel DAC channels per output for ultra-low distortion
• Selectable digital filters (Linear Phase, Minimum Phase, Slow Roll-off, Sharp Roll-off)
• Digital inputs: USB-B, AES/EBU (XLR), Coaxial S/PDIF, Optical TOSLink
• Analogue inputs

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