Integrated AKM AK4493S flagship DAC (supports PCM 768kHz/DSD512 hard decoding) and TI TPA3255 PFFB amplifier, input covers USB XMOS XU316/optical fiber/coaxial/HDMI ARC/Bluetooth (aptX Lossless+LDAC) and RCA multiplexing interface; output supports stereo and independent subwoofer (40-200Hz adjustable). Built-in NJW1194 chip realizes ±10dB tone adjustment