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Accuphase C-2450 Stereo Preamplifier

Accuphase



C-2450 Stereo Preamplifier

Blending the purely analog AAVA volume control circuit with sophisticated technology inherited from the C-2850 results in superb S/N ratio and a refinement of expression that brings new clarity to the music. The utterly smooth operation feel of the volume sensor assembly and a top plate made of brushed aluminum with a hairline finish demonstrate a level of dedication and hands-on craftsmanship that pervades every aspect of this preamplifier. Each C-2450 is individually honed to provide nothing short of perfection.

  • AAVA volume control for high performance and outstanding sound
  • Separate power transformers for left and right channels
  • Selectable preamp gain
  • Fully modular construction with individual left/right amplifier units on motherboard
  • Logic-controlled relays for shortest signal paths
  • Independent phase selection for each input position
  • Optional phono equalizer unit enables playback of analog records
  • Elegant side panels with natural wood 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 85 dB
    AD: MM/40 dB INPUT 84 dB   85 dB
    AD: MC/60 dB INPUT 80 dB 85 dB
    AD: MC/70 dB INPUT 72 dB 85 dB
    BALANCED/LINE 110 dB 108 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
    LINE INPUT → BALANCED OUTPUT: 18 dB
    LINE INPUT → LINE OUTPUT: 18 dB
    BALANCED/LINE INPUT → RECORDER REC: 0 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
    Tone Control

    Turnover frequency and adjustment range

    Bass: 300 Hz ±10 dB (50 Hz) Treble: 3 kHz ±10 dB (20 kHz)

    Loudness Compensation +6 dB (100 Hz)
    Headphone Jack Output level: 2 V (40 ohms), Suitable impedance: 8 ohms or above 
    Subsonic Filter  10 Hz: –18 dB/octave
    Attenuator –20 dB
    Power Requirements 120 V/220 V/230 V AC, 50/60 Hz (Voltage as indicated on rear panel)
     Power Consumption 38 watts
    Maximum Dimensions

    Width 465 mm (18.3")

    Height 150 mm (05.9")

    Depth 409 mm (16.1") (

    Depth 414 mm (16.3”) with AD-2850 installed)

    Mass 19.0 kg (41.9 lbs), 19.9 kg (43.9 lbs) with AD-2850 installed 25.0 kg (55.1 lbs) in shipping carton

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