Accuphase C-2850 Pre Amplifier



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Precision Stereo Control Center

Accuphase make some of the finest equipment in the world and we can't recommend them highly enough. All of their components will deliver a marked improvement to any system and are a fantastic base to a new build or an unparalleled upgrade to an existing one. Accuphase amplifiers will deliver all the power you need with very low noise levels.

Full mono construction

Inside the preamplifier, circuits and components are securely mounted to a sturdy 8 mm thick aluminum frame and kept completely separate for the left and right channels. This reliably prevents unwanted mutual interference, resulting in further improved electrical characteristics and perfectly pure sonic performance.

High-rigidity, high-accuracy volume sensor mechanism with ultra-smooth tactile feel

Turning the volume knob on the front panel causes the actual volume level position to be detected. The corresponding combination of weighted amplifiers then in turn adjusts the volume. The volume sensor mechanism is made of a massive aluminum block extruded and finished with utmost precision. The knob provides an exquisite tactile feel when rotated and ensures extremely accurate position detection. The entire mechanism is supported by a floating suspension using insulators, which also allows extremely quiet motor-driven operation when the remote commander is used.

Ideal left/right power supply configuration

The power supply circuitry not only acts as the energy source of an amplifier, it also has a dramatic influence on its sound. The C-2850 features a newly developed type of high-efficiency toroidal transformer in a cast-aluminum case with thermal dissipation fins. Each channel has its own transformer, along with a pair of custom-made electrolytic filtering capacitors rated for high capacity and excellent sonic properties. This arrangement provides ample power reserves for effortless operation.


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Frequency Response: BALANCED/LINE INPUT, 3 - 200,000Hz +0 -3.0 dB, 20 - 20,000Hz +0 -0.2 dB

Total Harmonic Distortion (for all inputs): 0.005%

Input Sensitivity: BALANCED 252mV, 0.5V Output 63mV. LINE 252mV, 05.V Output 63mV

Input Impedance: BALANCED 40 kilohms. LINE 20 kilohms

Rated Output Voltage, Output Impedance: BALANCED/LINE OUTPUT 2 V 50 ohms, RECORDER REC (with AD input) 252 mV 200 ohms

S/N Ratio, Input-converted Noise (gain selector: 18 dB): BALANCED 111 dB, S/N ratio (EIA) 110 dB. LINE 111 dB, S/N ratio (EIA) 110 dB

Maximum Output Level (0.005% THD, 20 - 20,000 Hz): BALANCED/LINE OUTPUT: 7.0 V, RECORDER REC (with AD input): 6.0 V LINE

Maximum Input Level: BALANCED/LINE INPUT: 6.0 V

Minimum Load Impedance: BALANCED/LINE OUTPUT: 600 ohms, RECORDER REC: 10 kilohms

Gain: (gain selector: 18 dB)*Gain switchable to 12/18/24 dB: BALANCED INPUT → BALANCED OUTPUT: 18 dB, BALANCED INPUT → LINE OUTPUT: 18 dB, LINE INPUT → BALANCED OUTPUT: 18 dB, LINE INPUT → LINE OUTPUT: 18 dB

Loudness Compensation: 1: +2 dB (100 Hz), 2: +4 dB (100 Hz), 3: +6.5 dB (100 Hz)

Attenuator: -20 dB

Headphone Jack: Suitable impedance: 8 ohms or higher, Output level: 2 V (40 ohms)

Subsonic Filter: 10 Hz: -18 dB/octave

Power Requirements: 230 V AC, 50 Hz (Voltage as indicated on rear panel)

Power Consumption: 40 Watts

Maximum Dimensions: Width 477 mm, Height 156 mm, Depth 412 mm

Mass: 24.5 kg, 31.0 kg in shipping carton