Description
Accuphase C-3900S Precision Stereo Preamplifier
Flagship Analog Performance with Unrivalled Precision
The Accuphase C-3900S stands as the ultimate evolution of the legendary C-3900, pushing the boundaries of analog preamplifier technology. With improved signal-to-noise ratio, lower distortion, and a completely re-engineered signal path, the C-3900S captures musical expression with breathtaking fidelity. Every component reflects Accuphase’s pursuit of perfection—from the handcrafted chassis to its balanced circuitry and cutting-edge noise suppression technologies.
Breakthrough Volume Control and Circuitry
At the heart of the C-3900S lies the dual balanced AAVA volume control, operating eight parallel circuits (positive and negative) per channel for supreme precision and ultra-low noise. The newly enhanced ANCC (Accuphase Noise and Distortion Cancelling Circuit) minimizes distortion across the signal chain, including the IV conversion stage. This preamplifier offers unmatched sonic purity at any volume level, supported by discrete current-feedback input amplifiers and fully balanced signal architecture from input to output.
Customisation, Connectivity, and Craftsmanship
The C-3900S offers exceptional user control and system integration. Features include adjustable gain settings, stereo-to-mono conversion, a -20dB attenuator, phase selection per input, and expanded compensator steps. The headphone amplifier employs a push-pull output stage for powerful and clean performance. Meticulously built, the unit features independent toroidal power supplies for analog stages, advanced vibration-damping cast iron insulators, and a luxurious champagne-gold front panel housed in a handcrafted wood cabinet.
Key Features
- Guaranteed ultra-low EIA S/N ratio of 113dB (C-3900: 112dB)
- Dual Balanced AAVA volume control with 8 AAVA circuits per channel
- ANCC technology applied to the IV conversion stage for high-precision, low-noise amplification
- High-gain discrete current feedback input amplifier
- High-quality headphone amplifier with push-pull transistor output stage
- Newly developed volume sensor for ultra-smooth and silent adjustment
- 5-stage tone control compensator (vs. 3 stages on C-3900)
- 7 line inputs and 4 balanced inputs; 2 line and 2 balanced outputs
- EXT PRE input for integration with external preamps
- Gain switch (12dB / 18dB / 24dB), stereo-to-mono conversion, and -20dB attenuator
- Selectable output phase and independent display toggle
- Signal PCB constructed from low-loss, low-dielectric glass cloth fluororesin
- Independent toroidal transformers and large filtering capacitors (12 x 10,000 μF)
- Elegant champagne gold finish with solid wood grain cabinet
- Supports analog disc playback via optional C-57 phono equalizer
