The excellent 'great value for money' C-47 will be replaced, check it out!
A translation from Japanese page:
"The new C-57 is a fully remodelled version of the C-47, combining the best of analogue technology and employing the latest circuits and high-quality sound elements to further enhance the appeal of analogue disc as the pinnacle of stereo phono amplifiers. The signal from a record player is so weak that it must be amplified by a phono equaliser amplifier to a voltage that can be handled by a preamplifier. However, phono equaliser amplifiers, which amplify extremely low signal levels, require amplifiers with low distortion, very low noise and good linearity from low to high frequencies. This amplifier is the ultimate in phono equaliser amplifiers and is capable of reproducing the full flavour and character of a wide range of cartridges and reproduces traditional analogue discs with high sound quality. The panel surface of the unit is based on a gold-toned panel face and the side panel surface is finished with natural wood grain, creating a graceful atmosphere and harmonising beautifully with existing products.
Main specifications
(1) High performance MC head amp circuit with new ANCC system.
Input conversion noise at MC: -156dBV (C-47: -155dBV)
Noise and distortion cancellation circuit with sub amplifier (new circuit different from conventional ANCC)
The secondary amplifier outputs the input/output error signal of the main amplifier and cancels noise (and other errors such as distortion) generated within the range enclosed by the secondary amplifier, including the thermal noise of the resistors.
Both the main and secondary amplifiers are balanced amplifiers.
The sub-amplifier is an ultra-low noise amplifier with a low impedance configuration using bipolar transistors.
The low power-supply voltage of the subamplifiers simultaneously realises improved performance and low-power consumption operation.
MC head amp gain is 50dB (equivalent to C-47).
The top panel has a new structure with a slit in order to suppress the entry of very small amounts of hum noise.
(2)A 60 Ω (MC) input load impedance has been added.
Selectable from 10/30/60/100/200/300/1kΩ for MC.
60Ω added between 30Ω and 100Ω to accommodate recent low-impedance MC cartridges.
Selectable from 1k/47k/100kΩ for MM.
(3) Design design reviewed from the operation system.
Symmetrical design with input selector on the left and load impedance selector on the right.
Improved operability of the load impedance selector and unification of the operation system with that of the preamplifier/pre-main amplifier.
Gold-plated pedestal (ring) around the selector.
Original selector with high rigidity and a special attention paid to the feel.
(4) Newly designed power circuit
Newly designed low-noise, high-regulation power circuit.
Newly designed low-voltage power supply with low noise specification for MC head amp sub-amps.
Newly designed transformer and block capacitors"
(5) Full balanced configuration (equivalent to C-47).
Independent MC/MM balanced head amps with dedicated design.
Low noise JFET input gain 20dB for MM head amp.
Balanced input/output RIAA equaliser amplifier
A translation from Japanese page:
"The new C-57 is a fully remodelled version of the C-47, combining the best of analogue technology and employing the latest circuits and high-quality sound elements to further enhance the appeal of analogue disc as the pinnacle of stereo phono amplifiers. The signal from a record player is so weak that it must be amplified by a phono equaliser amplifier to a voltage that can be handled by a preamplifier. However, phono equaliser amplifiers, which amplify extremely low signal levels, require amplifiers with low distortion, very low noise and good linearity from low to high frequencies. This amplifier is the ultimate in phono equaliser amplifiers and is capable of reproducing the full flavour and character of a wide range of cartridges and reproduces traditional analogue discs with high sound quality. The panel surface of the unit is based on a gold-toned panel face and the side panel surface is finished with natural wood grain, creating a graceful atmosphere and harmonising beautifully with existing products.
Main specifications
(1) High performance MC head amp circuit with new ANCC system.
Input conversion noise at MC: -156dBV (C-47: -155dBV)
Noise and distortion cancellation circuit with sub amplifier (new circuit different from conventional ANCC)
The secondary amplifier outputs the input/output error signal of the main amplifier and cancels noise (and other errors such as distortion) generated within the range enclosed by the secondary amplifier, including the thermal noise of the resistors.
Both the main and secondary amplifiers are balanced amplifiers.
The sub-amplifier is an ultra-low noise amplifier with a low impedance configuration using bipolar transistors.
The low power-supply voltage of the subamplifiers simultaneously realises improved performance and low-power consumption operation.
MC head amp gain is 50dB (equivalent to C-47).
The top panel has a new structure with a slit in order to suppress the entry of very small amounts of hum noise.
(2)A 60 Ω (MC) input load impedance has been added.
Selectable from 10/30/60/100/200/300/1kΩ for MC.
60Ω added between 30Ω and 100Ω to accommodate recent low-impedance MC cartridges.
Selectable from 1k/47k/100kΩ for MM.
(3) Design design reviewed from the operation system.
Symmetrical design with input selector on the left and load impedance selector on the right.
Improved operability of the load impedance selector and unification of the operation system with that of the preamplifier/pre-main amplifier.
Gold-plated pedestal (ring) around the selector.
Original selector with high rigidity and a special attention paid to the feel.
(4) Newly designed power circuit
Newly designed low-noise, high-regulation power circuit.
Newly designed low-voltage power supply with low noise specification for MC head amp sub-amps.
Newly designed transformer and block capacitors"
(5) Full balanced configuration (equivalent to C-47).
Independent MC/MM balanced head amps with dedicated design.
Low noise JFET input gain 20dB for MM head amp.
Balanced input/output RIAA equaliser amplifier
