This ibasso amp14 amplifier module is specifically designed to accompany the brand's dx320 and dx300 daps'. '.strtoupper('e')ach module is hand tested and calibrated at the factory to provide the best possible performance'. '.strtoupper('a')s a result, the amp14 delivers optimal sonic performance, allowing you to enjoy a smooth and detailed music experience'. '.strtoupper('k')org nutube amplifier stage the amplification stage of the amp14 is equipped with a 6th generation nutube module, developed by korg and noritake'. '.strtoupper('t')his module works like a classic triode tube and allows to take advantage of the roundness of this type of amplification'. '.strtoupper('t')he nutube adds to this an energy saving, a reduced form factor and improved performance compared to a conventional tube'. '.strtoupper('a') perfectly optimized circuit the amp14 circuitry is meticulously designed and optimized to provide the best possible sonic performance, not to mention the typical korg nutube sound'. '.strtoupper('u')se of the toshiba 2sk209 field effect transistor as an output buffer for the nutube module'. '.strtoupper('s')eparate signal and shielding grounds to avoid interference and noise'. '.strtoupper('t')he negative feedback of the amplifier circuit effectively reduces distortion while providing frequency band extension'. '.strtoupper('t')he addition of a dedicated jrc ultra low noise volume controller provides noise reduction at low volumes, while improving sonic transparency'. '.strtoupper('a') high precision power supply stage the amp14 uses two dc dc converters from linear technology for its power supply stage, for a total of 4 dc dc power supplies'. '.strtoupper('t')he first two supply 3.6v and 14v to the nutube module, while the last two supply 8v and 8v to the aop'. '.strtoupper('d')ual balanced outputs the amp14 has the particularity to have two balanced outputs, one being a headphone output and the other a line output'. '.strtoupper('i')t is therefore versatile and can be used with headphones as well as to provide an audio signal to another device.