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.

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.

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.

Protection circuit is used in replacement of relays which are known to degrade sound quality.

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.

The energy impressions are not solely based on power (output). There are many amplifiers with plenty of power but lack on speed. A perfectly matched energy and speed is pure power. Nissha 1 st output stage consists of FETs and 2 nd stage, bi-polar transistor. This single-push arrangement focuses its priorities on speed and pushes the technology to its limits. A pure 70W/8ohm per channel.