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Noises such as high frequency are present in signal line but are also in chassis which are commonly used as ground. Cross modulation distortion noise deteriorates the tonal quality and the natural characteristic property and neglects from being pure amplification. “Barrier Circuit” is a new approach to eliminating cross modulation distortion noise. This circuit significantly improves the entire band range reproducing unparallel natural sound. |
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NFB approach is effective. However, it is common knowledge that S/N ratios does not improve. (From the input side, the noise level will be lower however, the gain will also be lower and SN ratio will not change) On the other hand, as the amplifier gets larger, the noise generated from power supply circuit will increase accordingly. Therefore taking the NON-NFB approach drastically reduces noise and further improves SN Ratio. Also, because raw gain levels on NON-NFB are smaller, noise interference between individual parts components are also minimized. |
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Nissha Laboratory also designed an extremely stable power circuitry but found noise to be a problem. Moreover, they've concluded that extremely stable power source did not contribute significantly in sound quality. This resulted in the development of a stable power circuitry design based on low noise. This matched with the Barrier circuitry was an extremely fast speed and reproduced sounds of once difficult to play instruments naturally and smoothly. To further eliminate noise and leakage flux from the transformer, power supply and amplifier sections are floated with centralized grounding points. |
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R Core Transformer are known for their low flux leakage but Nissha Laboratory further housed the transformer into a metal case with special epoxy to shout out flux leakage and vibration. |
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Nissha Laboratory thoroughly pursed to excellence for sound quality. This meant the removal of unnecessary circuitry which resulted in sound quality deterioration. User friendly control circuitries are not only complex in design, it increase the number of parts that all relate to sound quality deterioration. The “Simple is Best” concept therefore allow them to focus their attention and raise the quality of individual parts respectively. |
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Unbalance and Balance sound quality difference is an arguable topic. Balance circuit is an essential circuit for long distance signal transmission traditionally used in professional environment. However, for pure high fidelity playback, it is said the balance circuit was adopted for convenience of use but more for fashion statement. He feels this perhaps can be a source to sound degradation and therefore, is not incorporated. |
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Other than electrolytic capacitors used in power supply section, electrolytic capacitors are generally not efficient in speed. Therefore, they are used at a bare minimum. And order to eliminate vibration from these capacitors, they are sandwiched between insulating materials and neatly wrapped in silk and bonded with special epoxy. Such high level tunings are all done 100% by hand. |
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| Frequency Response |
: 5Hz - 150kHz -0.5dB |
| Total Harmonic Distortion |
: less than 0.005% |
| S/N Ratio |
: over 105dB |
| Output Level |
: Coaxial Rated 1V ~ over 8V |
| Input Sensitivity Impedance |
: 205mV / 40kohm |
| Power Consumption |
: 6W |
| Power Source Voltage |
: AC120V 50/60Hz |
| Dimensions |
:
420 (W) x 110 (H) x 350 (D) mm |
| Weight |
: 9kgs |
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YN-2002C Excellent II Specification