Portable USB Multi-Channel DAC Headphone Amplifier
Currently in development by Holton Audio
USB portable multi channel headphone amplifier (Will drive 4 x 32 ohm headphones sets)
1 x Burr Brown 24bit 192khz PCM1794A DAC
4 x OPA1622 headphone amplifiers ICs
USB powered and charged and operated independently with on-board lithium battery.
USB, SPDIF, Optical selectable input sources.
Independent volume control for each headphone set.