Tube type preamplifier with reliable tube C3g. High ability to eliminate common mode noise due to noise processing technology based on power supply development. Provides a noise reduction effect.

Stereo Preamplifier C3PR


Equipped with C3g

Equipped with the ultra-reliable C3g developed by Deutsche Telekom for telephone repeaters. The thin grid lines and large distance between electrodes enable high linearity amplification. The C3g is soldered directly onto the board to reduce noise at the contact point.


Proprietary in/out transformers

Proprietary transformers are used for the input and output. The transformer is an important part that influences the performance of distortion, S/N ratio and input/output impedance. Therefore, the core material, wire material, winding thickness, and winding ratio are meticulously designed and manufactured.


Left/Right independent power supply

Independent power supplies deliver power to the left and right channels as well as control circuits. Using all of the characteristics of the components together, we are able to preserve silence.


Resistance switching ladder attenuator

In a variable resistor that slides on a resistor, noise is generated by a point-contact diode, which can be a source of distortion. This unit is a crossbar twin structure. A gold and platinum contact relay switches the resistance and attenuates from 0 dB to -60 dB.

C3PR_LE2.png C3PR_wave.png There are two front panels to choose from: one with a graceful design that complements the music, and the other with a wave pattern that expresses harmony with the music.


Model C3PR
Type Vacuum tube stereo preamplifier
Frequency Response 20 Hz-20 kHz +0-1 dB
Max. Input Voltage 4 V/1 kHz
Max. Output Voltage 4 V/1 kHz
THD 0.05% 1 kHz 250 mV
Signal to Noise Ratio

80 dB/ATT 0 dB, 100 dB/ATT -20 dB

Gain 16 dB
Min. load Impedance 600 Ω
Input Terminal

Balanced x2, Unbalanced x4

Input Impedance 7 kΩ or more
Output Terminal

Balanced x2, Unbalanced x2

Output Impedance 50 Ω or less
Balance Adjustment ±3.5 dB
Compensator +2 dB 3 Steps 100 Hz
Remote Control

Infrared transmitter

Power Supply AC100/120/200/240 V, 50/60 Hz
Power Consumption 30 W
Dimensions 470W×90H×400D mm *
Weight 14 kg

Anodic oxide coating


Rhodium-plated AC cords, Remote control

microUSB cable for charging

Warranty Period 5 years(Excluding consumables)

* Knobs and terminals are not included.

  • Please use a pre-stage equipment with an output impedance of 1.5 kΩ or less.
  • Product appearance and specifications are subject to change without notice.
  • ■Dimensions

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