The UD-505-X is a flagship dual monaural USB DAC with an integrated fully-balanced headphone amplifier, that fuses high-end audio design concepts and TEAC’s decades of audio design experience, in an A4-sized footprint. The dual mono structure processes stereo signals with higher purity, and the D/A converter section uses one ESS Technology ES9038Q2M in each of the left and right channels. This model achieves a high signal-to-noise ratio by using each DAC in mono mode.