C-2450 Stereo Preamplifier
C-2450 Stereo Preamplifier
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C-2450 Stereo Preamplifier

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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

 

 


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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