Preamplifiers — Accuphase C-3900S
Description, images, technical data and specifications
Accuphase C-3900S
Image source — © Accuphase
The Accuphase C-3900S is built around the Dual Balanced AAVA volume control system. Unlike traditional preamplifiers, this concept abandons passive signal attenuation using resistors. Instead, volume is adjusted actively through a combination of multiple amplifier stages with different gain levels. The parallel implementation of two balanced AAVA circuits per channel further reduces noise and improves electrical stability. Complementing this design is the ANCC circuit, which actively compensates noise-related distortion. Especially at low and mid listening levels, this is intended to deliver the cleanest possible signal – an important practical advantage for everyday listening at realistic volume levels.
Specifications
Model name
C-3900S
Analog inputs (balanced)
4
Analog inputs (single-ended)
6
Analog outputs (balanced)
2
Analog outputs (single-ended)
2
Gain (dBu)
N/A
Input sensitivity (mV)
N/A
Output voltage (V)
N/A
Input impedance (balanced) (Ω)
N/A
Input impedance (single-ended) (Ω)
N/A
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
Maximum output level (balanced) (dBu)
N/A
Maximum output level (single-ended) (dBu)
N/A
Volume control range (dBu)
N/A
Frequency response low +/- 3dB (Hz)
20
Frequency response high +/- 3dB (Hz)
20000
Signal to Noise Ratio (SNR, unweighted) (dB)
118
Total Harmonic Distortion + Noise (THD+N) (%)
0.005
Dimensions (mm)
477 × 156 × 412
Weight (kg)
25.3
Official link
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