Since the C-3800 launch as the 40th anniversary celebrationin 2010, Accuphase has been evolving its flagship preamplifier, and the C-3850 in 2015 received unwaveringinternational reputation from the audiophiles all over theworld.
As The 3rd generation of C-3000 series, with the culminationof half a century, C-3900 represent an uncompromising
harmony of technology and sensibility, boasting ultimate
performance and sound quality.
In the C-3900, the Balanced AAVA principle is further
elevated by driving 2 units in parallel, resulting in the Dual
Balanced AAVA topology with significantly improved
electrical performance.
Experience the ideal image of music playback that C-3900
delivers, that music echoes throughout a space surroundedby absolute silence.
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The dimensions of C-3900 are exactly same as theformer model C-3850.
The weight of C-3900 is almost same as the former
model as well.
**Weight of C-3850: 25kg

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C-3900 inherits C-3800’s internal construction as it is.
It has the complete symmetric layout centered on strong
power supply by large toroidal transformer with heatradiation fins and 12 pieces of special made 10000μF
capacitors.

3Amplifier circuits are mounted on gold plated glass cloth
fluorocarbon resin PC-board by fully modular
construction which has beneficial effects on the heatdissipation performance and the ease of maintenance.

4The music signal does not pass volume mechanism inAAVA and also dual balanced AAVA. It is just a position
sensor to set sound volume.
However, the feeling of the volume knob is very
important for audio enthusiasts.
Therefore the volume sensor mechanism of splendid
operation feeling was newly developed in C-3800’sproject.
In the C-3900, the motor and the set of gears aremounted with the floating mechanism, and with thecustom-made grease, the knob provides a smooth
operation feel and super-quiet volume adjustment.

5C-3900 has the lowest noise performance in the 48years’ history of Accuphase pre-amplifier.
Its output noise voltage is 30% lower than C-3850’s
figure which was the world’s best performance at thattime.

6The AAVA(Accuphase Analog Vari-gain Amplifier) is aradically different volume control principle that eliminates all
variable resistors from the signal path.
The former model C-3850 employs two AAVA modules in a
fully balanced configuration from input to output.
It’s called Balanced AAVA.
In the C-3900, the balanced AAVA principle is further
elevated by driving 2 such units in parallel, resulting in theDual Balanced AAVA topology with significantly improved
electrical characteristics.

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When the amplification circuits are connected in series as amulti-stage amplifier, the noise characteristic is improved byincreasing the amplification degree at the 1st stage.
Similarly for AAVA, the C-3900 achieved the amazing noise
performance by applying the high-gained Input amplifier at its
1st stage.

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ANCC: “Accuphase Noise and distortion Canceling Circuit” isinstalled in the current to voltage converter of each AAVA.
Cancelling noise and distortion are realized by detecting thecomponents of noise and distortion at the input stage of an IV converter module, also by injecting the cancelling current
which contains the reversed polarity of those components.
ANCC is a highly effective technology at any volume position.

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A summing amplifier is used for cancelling noises bysynthesizing each AAVA output.
In the C-3900, 4 paralleled summing amplifiers are mounted
on balance-output and line-output, this provides dramatic
results for noise reduction.
The theoretical noise generated in summing amplifier will be
1/2（=√4）by this 4 parallel configuration.

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The headphone amplifier of fully discrete circuit with parallelpush-pull output stage is newly designed and equipped on C3900.
The adaptable impedance is 8 ohm or above and the gain
setting is selectable.
Elegant and high-quality remote commander is supplied with.

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