Introduction

The Accuphase C-47 is the first phono stage in its series to deliver a fully balanced signal path from cartridge input to line output. By combining a high-gain, low-noise head amplifier with a precision equalizer stage, it unleashes the full musical potential of both moving-coil and moving-magnet cartridges—offering reference-level clarity, dynamics, and tonal purity for vinyl enthusiasts.

Design

Built around a two-stage topology, the C-47’s dedicated head amplifier delivers 50 dB gain for MC and 20 dB for MM cartridges, minimizing noise before feeding a separate high-accuracy equalizer amplifier. Both stages remain fully balanced, and every component—from glass-cloth fluorocarbon PCBs to hand-selected capacitors—is optimized for sonic neutrality. The chassis houses two complete, mono-block signal paths, each with its own toroidal transformer and regulated power supply, ensuring absolute channel separation.

Application

Ideal for audiophiles and professionals alike, the C-47 accepts up to four turntable inputs (one dedicated balanced MC and three standard MM/MC) with individual loading and gain settings stored per input. Use it as the heart of a high-end two-channel system or integrate it into a home-theater rig for vinyl playback; its balanced XLR and single-ended RCA outputs feed any preamplifier, integrated amp, or power amp with zero compromise.

Technology Overview

• Fully Balanced Architecture
  Carries the cartridge signal in true differential form through both head-amp and equalizer stages, rejecting external noise and preserving low-level detail.
• Full Mono Construction
  Each channel has separate amplifier boards, power transformers, and smoothing capacitors, eliminating crosstalk and ensuring maximum channel independence.
• Low-Noise Regulated Power Supply
  Four 25 V/15 000 µF electrolytic capacitors per channel and precision regulators keep ripple and load-induced noise to an absolute minimum.
• Digital Load & Gain Memory
  Seven-segment display and microprocessor control let you select impedance (MC: 10/20/40/100/200 Ω; MM: 47 kΩ) and gain per input, with instant recall at power-up.

Key Features

• Dedicated balanced MC head amplifier (50 dB gain) and MM head amplifier (20 dB gain)
• Fully balanced equalizer amplifier with RIAA precision ±0.3 dB (20 Hz–20 kHz)
• One balanced MC input; three additional MM/MC inputs; automatic input sensing
• Separate toroidal transformer and power supply for each channel (full mono)
• Glass-cloth fluorocarbon PCBs and hand-selected high-reliability components
• Microprocessor-controlled impedance (10–200 Ω MC; 47 kΩ MM) and gain settings with seven-segment display
• Balanced XLR and single-ended RCA outputs with polarity selector
• Low-noise, regulated power supplies with 60 W maximum consumption

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