Αναζήτηση

Accuphase C-2900 Precision Stereo Preamplifier

23900
  • Διαθεσιμότητα

    ΚΑΤΟΠΙΝ ΠΑΡΑΓΓΕΛΙΑΣ

  • Κωδικός Sound Gallery:

    18393

  • Κατηγορίες:

    Τρανζίστορ

The preamplifier’s volume control is a vital component for maintaining vibrancy in the sound source.

Since its founding, Accuphase has spent 50 years in pursuit of creating the ideal volume control circuitry.

Μοιράσου το:

Features

Balanced AAVA volume control

Logic-controlled relays for signal switching assure high sound quality and long-term reliability

Printed circuit boards for signal transmission use glass cloth fluorocarbon resin with low dielectric constant and minimum loss along with gold-plating on copper foil surfaces

Power supply circuits with separate toroidal transformers and filtering capacitors (10,000 μF × 4 pcs) for the left and right

Newly developed volume sensor construction for a quiet and smooth operation feel

Versatile arrangement of inputs and outputs (five line level inputs, two balanced inputs, two line level outputs, and two balanced outputs)

Line level input and output connectors for a recorder

Line level and balanced EXT PRE inputs for connection of an external preamplifier

Individual phase setting for each input

Switchable overall gain (12 dB / 18 dB / 24 dB)

Left / right balance control through Balanced AAVA

Stereo signal can be switched to monophonic operation

Volume attenuator to instantly reduce sound to as low as –20 dB

Loudness compensator for correcting the perceived spectral balance

Informative and easy to read input and volume level display with on / off switching

Discretely configured, high-quality headphone amplifier with parallel push/pull output stages

Subsonic filter that cuts off ultra-low frequency noise from record warping

Natural grain wood case with a mirror finish crafted by artisans using carefully selected virgin wood

High-carbon cast iron insulator feet with superior damping characteristics

Adding the AD-2900 to the C-2900 allows you to play analog discs.

Front panel switching function for using a phono equalizer expansion unit

• MC/MM switching

• MC load impedance switching (10 / 30 / 100 / 200 / 300 ohms)

• Gain switching (MM: 34 / 40 dB, MC: 64 / 70 dB)


Specifications

Frequency responseBALANCED LINE INPUT200,000 Hz +0 -3.0 dB
20 - 20,000 Hz +0 -0.2 dB
AD INPUTMM / 40 dB, MC20  20,000 Hz ±0.2 dB
MM 34 dB20 - 20,000 Hz ±0.3 dB
Total harmonic distortion20 20,000 HzAt rated outputAll input connectors0.005%
Input sensitivity, Input impedanceInput connectorInput sensitivityInput impedance
At rated outputFor 0.5 V output
BALANCED252 mV63 mV40 kilohms (20 kilohms 20 kilohms)
LINE252 mV63 mV20 kilohms
AD: MM 34 dB5.0 mV1.26 mV47 kilohms
AD: MM / 40 dB2.5 mV0.63 mV47 kilohms
AD: MC 64 dB0.16 mV0.04 mV10 30 100 200 / 300 ohms
AD: MC 70 dB0.08 mV0.02 mV10 / 30 / 100 / 200 / 300 ohms
Rated output voltage, Output impedanceBALANCED / LINE OUTPUT2 V50 ohms
RECORDER REC (at AD input)252 mV50 ohms
S/N ratio, Input-converted noiseInput connectorInput shorted (A weighting)S/N ratio (EIA)
S/N ratio at rated outputInput-converted noise
BALANCED LINE113 dB-125 dBV110 dB
AD: MM 34 dB91 dB-137 dBV85 dB
AD: MM / 40 dB85 dB-137 dBV85 dB
AD: MC 64 dB79 dB-155 dBV85 dB
AD: MC / 70 dB73 dB-155 dBV85 dB
Max. output levelBALANCED LINE OUTPUT7.0 V
(Distortion: 0.005 %, 1 kHz)| RECORDER REC (at AD input)6.0 V


Max. input voltageBALANCED LINE INPUT6.0 V
(Distortion: 0.005 %, 1 kHz)AD MM / 34 dB INPUT190 mV
AD MM / 40 dB INPUT95 mV
AD MC / 64 dB INPUT6.0 mV
AD MC / 70 dB INPUT3.0 mV
Minimum load impedanceBALANCED / LINE OUTPUT600 ohms
RECORDER REC10 kilohms
Crosstalk-80 dB 10 kHz
Gain (Gain switching: 18 dB) * ±6 dB GAIN switching possible for all modes except REC OUTPUTINPUTOUTPUTGain
BALANCED / LINEBALANCED / LINE18 dB
BALANCED / LINERECORDER REC0 dB
AD MM: 34 40 dBBALANCED / LINE52 / 58 dB
AD MM: 34 40 dBRECORDER REC34 40 dB
AD MC: 64 70 dBBALANCED / LINE82 / 88 dB
AD MC: 64 70 dBRECORDER REC64 / 70 dB
Loudness compensation1: +2 dB (100 Hz), 2: +4 dB (100 Hz), 3: +6.5 dB (100 Hz)
Subsonic filter10 Hz-18 dB/octave
Headphone jackSuitable impedance8 ohms or higher
Output level2 V (40 ohms)
Level switchingLOW:-10dB, HIGH:+10dB from standard MID level
Attenuator-20 dB
Power requirements120 V, 220 V, 230 V AC (voltage as indicated on rear panel)50 60 Hz
Power consumption31 W
Maximum dimensionsWidth 477 mm (18.78") x Height 156 mm (6.14") x Depth 412 mm (16.22") [With AD-2900 expansion: Depth 414 mm (16.23")]
MassNet24.2 kg (53.4 lbs) [With AD-2900 expansion: 25.1 kg (55.3 lbs)]
In shipping carton31 kg (69 lbs)
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