Jungson Pre + Power Amplifier JA-1 / JA-99C 30th Anniversary Upgraded Export Edition

Jungson audio Technology Co., Ltd., in order to commemorate a historic moment, JungSon Audio introduced the JA-1 / JA-99C 20th anniversary commemorative version of the first-class A power amplifier in 2015

The JA-1 / JA-99C 30th Anniversary Edition has been greatly revised. The front-end chassis is all aluminum brushed and anodized, while the Kanghua version adopts the special stainless steel panel of JungSon . The rear stage is the exposed structure of the radiator, which guarantees the heat dissipation performance and outlines the tough lines. The lake blue header adds a lot of vitality to the whole machine.
The JA-1 / JA-99C 20th Anniversary Edition uses a fully balanced transmission amplifier circuit, and the circuit is entirely composed of discrete components.

In this way, a large dynamic range ,an ideal signal-to-noise ratio and a very low distortion has been obtained.

In addition, for the JA-1 / JA-99C 30th Anniversary Edition, the power supply has been upgraded

There are multiple groups of left and right channels in parallel and independent power supply.

The JA-1 pre amp uses 4 groups per channel, JA-99C uses two groups per channel, rigorous and high-cost power supply method to ensure no crosstalk between left and right channels, improve separation, and lay a solid foundation for the reproduction of music details,

There are 5 groups in total, 1 group is balanced, 4 groups are unbalanced, and the line outputs are 2 balanced and unbalanced outputs each.
This Pre Amplifier adopts high-precision relay step-type volume control technology, which is different from the traditional carbon film potentiometer and volume integrated module control. It has the advantages of small step loss and no noise, which greatly improves stability.

JA-99C balanced, non-parallel input for each group, JA-1 / JA-99C uses excellent materials, diodes use fast recovery type,The power regulating tube adopts SAMKEN (C4883 / A1859), Philips audio triode, ELNA SILMIC audio coupling capacitors, etc. The energy source device is made of silicon steel sheet for audio. Each JA-1 left and right channel uses a 90VA EI power transformer. JA-99C uses a 900VAEI power transformer to provide the power of the whole machine. The power amplifier stage uses a total of 160,000uF capacitors as a filter for each channel.

6 Toshiba (C5200 / A1943) for 8 ohm 80W Class A output, easily control any large dynamic type of music, perfect interpretation.

The texture and permeability of high frequency, the density of intermediate frequency, the and energy of low frequency are brilliant since the amplifier operates in Class A. 

The JungSon amplifier emphasizes Class A design, warm and musical sound with expressiveness.

The characteristics of the sound of this amplifier are warm tone, resolution, Excellent sound stage field and precise instrument positioning