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Accuphase C-2850 Stereo Preamplifier

Accuphase



C-2850 Stereo Preamplifier

C-2800 series renewal creates the ultimate preamplifier — C-2850. A new preamp generation defined by the harmony of craftsmanship and technology. The revolutionary AAVA (Accuphase Analog Vari-gain Amplifier) principle which enables optimal volume adjustment has been further refined, for ultra-low noise and utterly quiet operation, combined with perfect operation feel. Experience the ultimate in volume control performance and comfort from a component that is in a class of its own. Sophisticated technology and optimized construction using only carefully selected top-notch parts and materials provide effortless operation stability, with ample performance leeway that is the secret behind ultimate reliability. Each single C-2850 is lovingly built by highly experienced craftspersons skilled in the art. The result is a product destined to transport the listener into the enchanting realm of high-end audio.

  • AAVA volume control for high performance and outstanding sound
  • Separate high-efficiency toroidal power transformers for left and right channels
  • Selectable preamp gain
  • Fully modular construction with separate left/right units for each amplifier stage
  • Logic-controlled relays for shortest signal paths
  • Independent phase selection for each input position
  • Printed circuit boards made from glass cloth fluorocarbon resin
  • Optional playback capability for analog records
  • Massive wood cabinet with natural grain finish

Download the Brochure here.

Download the Fact Sheet here.

 

Frequency Response
BALANCED/LINE INPUT 3 ‒ 200,000 Hz +0 -3.0 dB 20 ‒ 20,000 Hz +0 -0.2 dB
AD INPUT [MM/40 dB, MC]   20 ‒ 20,000 Hz ±0.2 dB
AD INPUT [MM/30 dB]: 20 ‒ 20,000 Hz ±0.3 dB

Total Harmonic Distortion (for all inputs) 0.005%
Input Sensitivity, Input Impedance
Input
  Input sensitivity
For rated output   For 0.5 V output
  Input impedance
AD: MM/30 dB INPUT
8.0 mV   2.0 mV
47 kilohms
AD: MM/40 dB INPUT
2.5 mV   0.63 mV
47 kilohms
AD: MC/60 dB INPUT
0.25 mV   0.063 mV
10/30/100/300 ohms, switchable
AD: MC/70 dB INPUT
0.08 mV   0.02 mV
10/30/100/300 ohms, switchable
BALANCED/LINE
252 mV   63 mV
40 kilohms/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
  Input shorted (A weighting)
S/N ratio at rated output
EIA S/N
AD: MM/30 dB INPUT 94 dB 86 dB
AD: MM/40 dB INPUT 85 dB   86 dB
AD: MC/60 dB INPUT 80 dB 86 dB
AD: MC/70 dB INPUT 73 dB 87 dB
BALANCED/LINE 111 dB 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 
Maximum Line Input Voltage BALANCED/LINE INPUT: 6.0 V

Maximum AD Input Voltage

(1 kHz, 0.005% THD)

MM [30/40 dB] INPUT: 310/96.5 mV
MC [60/70 dB] INPUT:   9.5/3.2 mV
Minimum Load Impedance
BALANCED/LINE OUTPUT:   600 ohms
RECORDER REC 10 kilohms

Gain (18 dB position)

Gain selector switch: 12/18/24 dB switchable

BALANCED/LINE INPUT → BALANCED/LINE OUTPUT: 18 dB
LINE INPUT → LINE OUTPUT: 18 dB
  AD [MM: 30/40 dB] INPUT → BALANCED/LINE OUTPUT: 48/58 dB
AD [MM: 30/40 dB] INPUT → REC OUTPUT: 30/40 dB
AD [MC: 60/70 dB] INPUT → BALANCED/LINE OUTPUT: 78/88 dB
AD [MC: 60/70 dB] INPUT → REC OUTPUT: 60/70 dB
Loudness Compensation 1: +2 dB (100 Hz), 2: +4 dB (100 Hz), 3: +6.5 dB (100 Hz)
Headphone Jack Output level: 2 V (40 ohms), Suitable impedance: 8 ohms or above Gain (LOW, MID, HIGH): ±10 dB from standard MID level
Subsonic Filter  10 Hz: –18 dB/octave
Attenuator –20 dB
Power Requirements AC120 V/220 V/230 V 50/60 Hz (Voltage as indicated on rear panel)
 Power Consumption 40 watts
Maximum Dimensions Width 477 mm (18-3/4") Height 156 mm (6-1/8") Depth 412 mm (16-1/4") (Depth 414 mm with AD-2850 installed)
Mass 24.5 kg (54.0 lbs) net (25.4 kg (56.0 lbs) with AD-2850 installed) 31.0 kg (68.3 lbs) in shipping carton

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