Audio Database

Image of C10
Commentary

This is a stereo control amplifier designed with low distortion, low noise and ultra-wide bandwidth by completely eliminating magnetic materials that distort sound.

The C10 eliminates all magnetic material from the chassis and case to the switch frame and volume cover to minimize distortion due to magnetization.

Taking note of the fact that capacitors have a significant effect on sound quality, we have adopted an original capacitor that has been changed from the conventional aluminum case to a resin case. The resin case prevents distortion due to eddy currents, improves impedance characteristics, and reduces distortion.
In addition, capacitor elements have been treated thoroughly by reducing ESR (equivalent series resistance) (1/2 of conventional ones), using plain foils, improving impedance characteristics equivalent to film capacitors, reducing distortion (3rd harmonic 15 dB), and using oxygen-free copper wires for lead wires.

A unique non-magnetic switch is used for the switches.
By using non-magnetic brass for the case of this switch, the generation of distortion is almost eliminated. This eliminates the intervention of magnetic material in the switch part. In addition, the switch part is directly plated with silver on brass, and the movable contact is plated with silver on the phosphor bronze, so the reproduction sound without any sense of distortion is obtained.

The pin jack is gold-plated.
In general gold plating, nickel plating is applied to the base in order to stabilize the plating. Therefore, due to the influence of the ferromagnetic material nickel, the strain caused by hysteresis is generated. The newly developed pin jack used in the C-10 is coated with a non-magnetic base plating that shows stability equal to or higher than that of nickel to prevent the generation of strain.

Oxygen-free copper wire is used for wiring inside the amplifier.

The power cord uses a highly reliable 15A large-capacity power cord with double insulation.
In addition, the core wire of this power cord is color-coded in black and white, and the connection with the AC plug is managed to unify the polarity.

A 140 μ m thick copper foil glass epoxy board is used for the substrate.
Conventional glass epoxy boards used 35 μ m copper foil attached to them. However, in order to reduce DCR (direct current resistance) and inductance in the board, we use 140 μ m copper foil, which is four times larger than conventional ones.

Equipped with a unique supersonic filter.
This filter is composed of an air-core coil with a cutoff at 50 kHz and a resistor, and has a large effect on TIM distortion countermeasures.

The wooden case has an oil finish of Andes Rose natural wood.

Pin cord for connection is included.
This connection code uses a oxygen-free copper wire as the material and a gold-plated plug made of a non-magnetic material as the pin plug to minimize the occurrence of strain in the connection code. In addition, unlike the conventional coaxial structure, the structure of the connection code is a star quad system in which the core wires of the signal wires facing each other are twisted together to reduce the inductance. In addition, the signal wires are made of conductive polymer material and completely shielded by polarization.

Model Rating
Type Stereo preamplifier
Input Sensitivity / Impedance Phono:2.5mV
Cartridge Load Capacity Phono1/2 : 100 pF, 200 pF, 300 pF, 400 pF, 500 pF
Cartridge load resistance Phono1/2 : 100 Ω, 10k Ω, 25k Ω, 50k Ω, 100k Ω
Aux1/2, Tape play1/2 : 150mV/50k Ω
Phono maximum allowable input 300 mv (Harmonic distortion rate 0.002%, 1 khz)
Output Level / Impedance Tape rec1/2 : 150mV/2.2k Ω
Pre output(RL: 50k Ω) : 1V/100 Ω (rating)
15V/100 Ω (Maximum)
Harmonic distortion factor (20 Hz to 20 kHz) Phono : 0.002% (1 v output, volume - 20 20 dB)
Aux1/2, Tape play : 0.002% (1 V output)
0.003% (15 v Output)
Frequency characteristic Phono : 20 Hz to 20 kHz ± 0.2 dB
Aux1/2, Tape play : 3 Hz ~ 800 kHz + 0 -3dB
Filter Low:15Hz(12dB/oct)
High:50kHz(6dB/oct)
S/N (IHF, A-network
Short circuit)
Phono:90dB
Aux1/2, Tape play : 105 dB
Attenuator -20dB
Semiconductor used IC : 1
Transistor : 58 pcs
Diode, etc. : 38 pcs
FET : 8
AC outlet Power switch interlock : 900W
Power switch not linked : 500W
Power supply voltage 100 VAC, 50Hz/60Hz
Power consumption 70W (Rating, Electrical Appliance and Material Control Law)
70W maximum
External dimensions Width 468x Height 206x Depth 367 mm
Weight 13.3kg
Attachment Connection code with pin plug