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Link: audio-heritage
Собран на: 4 x AD1862
Serial number: 120086
Serial number: 120086
D / A converter paired with CD Transport P-700.
ZDII is adopted as the D / A conversion circuit.
In the case of a D / A converter, especially when the signal level or the signal level is -60 dB or less, the conversion error occurs and the resulting distortion occurs.
Distortion shaper ZDII uses a dither method to disperse and drastically reduce the conversion error of the D / A converter, realizing a significant ultra-low distortion rate. In addition, an extremely high S / N ratio has been obtained by using a unique wide area centralized (high-pass) dither. This enhances the reproducibility of minute signals and the expressive power of overtone components superimposed on large volume signals.
The 20-bit 8 times oversampling digital filter is adopted as a digital filter.
This makes it possible to use a low-pass filter with a gentle cutoff characteristic, thus improving the group delay characteristic.
The 1/16 shift 20bit4DAC is carried in the D / A conversion part.
In this DAC, the small signal emphasis type DAC of the 1/16 (digital offset) system which eliminates the MSB error originally occurring near 0V is adopted. This is reducing the 0 cross distortion which occurs when an input code passes 0V to 1/8 of the conventional system by shifting the 0V operating point of DAC by 1/16 of full scale.
Thereby, the linearity of the signal area (-18dB or less) where the music signal is concentrated is dramatically improved.
The cut core balance winding transformer is adopted as a power supply part. In this transformer, a magnetic field is canceled by dividing a winding into two equal parts and making each phase the opposite phase, and the harmful electromagnetic noise is suppressed to the minimum. In addition, because the windings are in parallel, self-inductance and DC resistance are also reduced, and excellent regulation is obtained.
Furthermore, the positive / negative independent balance power supply part which made the winding of positive power supply and negative power supply independent is constituted, and the ground potential is clarified.
Including digital transmission and analog transmission, balanced transmission is adopted for the main part.
Simultaneous transmission of not only positive-phase signals but also negative-phase signals cancels the ingress of noise into the ground line.
Not only key devices, but also audio-only parts originally developed, including capacitors and resistors, are used.
The power supply unit is equipped with a bridge rectifier circuit and employs a power supply unit capacitor equivalent to Esoteric, a reference series at the time. Furthermore, the occurrence of high-frequency noise that adversely affects sound quality is suppressed by the PCB substrate that has been subjected to double-sided shielding.
The rear panel of copper plating is adopted in order to eliminate the potential difference of the input and output which occurs at the time of D / A conversion, and the S / N ratio is eliminated about 6dB outside an audible band, and about 1dB in a band.
ZDII is adopted as the D / A conversion circuit.
In the case of a D / A converter, especially when the signal level or the signal level is -60 dB or less, the conversion error occurs and the resulting distortion occurs.
Distortion shaper ZDII uses a dither method to disperse and drastically reduce the conversion error of the D / A converter, realizing a significant ultra-low distortion rate. In addition, an extremely high S / N ratio has been obtained by using a unique wide area centralized (high-pass) dither. This enhances the reproducibility of minute signals and the expressive power of overtone components superimposed on large volume signals.
The 20-bit 8 times oversampling digital filter is adopted as a digital filter.
This makes it possible to use a low-pass filter with a gentle cutoff characteristic, thus improving the group delay characteristic.
The 1/16 shift 20bit4DAC is carried in the D / A conversion part.
In this DAC, the small signal emphasis type DAC of the 1/16 (digital offset) system which eliminates the MSB error originally occurring near 0V is adopted. This is reducing the 0 cross distortion which occurs when an input code passes 0V to 1/8 of the conventional system by shifting the 0V operating point of DAC by 1/16 of full scale.
Thereby, the linearity of the signal area (-18dB or less) where the music signal is concentrated is dramatically improved.
The cut core balance winding transformer is adopted as a power supply part. In this transformer, a magnetic field is canceled by dividing a winding into two equal parts and making each phase the opposite phase, and the harmful electromagnetic noise is suppressed to the minimum. In addition, because the windings are in parallel, self-inductance and DC resistance are also reduced, and excellent regulation is obtained.
Furthermore, the positive / negative independent balance power supply part which made the winding of positive power supply and negative power supply independent is constituted, and the ground potential is clarified.
Including digital transmission and analog transmission, balanced transmission is adopted for the main part.
Simultaneous transmission of not only positive-phase signals but also negative-phase signals cancels the ingress of noise into the ground line.
Not only key devices, but also audio-only parts originally developed, including capacitors and resistors, are used.
The power supply unit is equipped with a bridge rectifier circuit and employs a power supply unit capacitor equivalent to Esoteric, a reference series at the time. Furthermore, the occurrence of high-frequency noise that adversely affects sound quality is suppressed by the PCB substrate that has been subjected to double-sided shielding.
The rear panel of copper plating is adopted in order to eliminate the potential difference of the input and output which occurs at the time of D / A conversion, and the S / N ratio is eliminated about 6dB outside an audible band, and about 1dB in a band.
Model D / A converter
Audio channel 2 channels
Frequency characteristic
- 0 to 20kHz ± 0.3dB (RCA, 44.1kHz)
- 5Hz-20kHz ± 0.3dB (XLR, 44.1kHz)
S / N ratio 110dB (EIAJ)
Dynamic range 100dB (EIAJ)
Harmonic distortion 0.0015% (EIAJ)
Channel separation 110dB (EIAJ)
Analog output
- 5Hz-20kHz ± 0.3dB (XLR, 44.1kHz)
S / N ratio 110dB (EIAJ)
Dynamic range 100dB (EIAJ)
Harmonic distortion 0.0015% (EIAJ)
Channel separation 110dB (EIAJ)
Analog output
- RCA: 2.1Vrms / 47kΩ
- XLR: 2.0Vrms / 600Ω
Digital input Coaxial: 0.5Vp-p / 75Ω, 2 systems
Light: 2 systems
D / A converter 1/16 shift 20 bit 4DAC
Digital filter 20-bit 8 times oversampling
Analog filter GIC 3rd order Butterworth filter
Power supply AC100V, 50Hz / 60Hz
Power consumption 14W
External dimensions width 225 x height 138 x 400mm in depth
Weight 6.0kg
- XLR: 2.0Vrms / 600Ω
Digital input Coaxial: 0.5Vp-p / 75Ω, 2 systems
Light: 2 systems
D / A converter 1/16 shift 20 bit 4DAC
Digital filter 20-bit 8 times oversampling
Analog filter GIC 3rd order Butterworth filter
Power supply AC100V, 50Hz / 60Hz
Power consumption 14W
External dimensions width 225 x height 138 x 400mm in depth
Weight 6.0kg
Японский трансформатор на выходе ровно 100в. Абсолютно бесшумный, мощность 200W.
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