1、Hardware configuration

Decoding core: AKM AK4493S flagship DAC chip, supports PCM 768kHz / DSD512 native hardware decoding

Amplifier module: TI TPA3255 PFFB, output power 2×300W@4Ω (high efficiency and low distortion)

Digital interface: XMOS XU316 USB audio solution, supports ultra-low latency asynchronous transmission

Bluetooth chip: Qualcomm QCC3084, compatible with aptX Lossless / LDAC / LC3 and other high-definition encodings

Sound control system: NJW1194 electronic volume chip, supports ±10dB high and low bass adjustment

2、Input interface
Digital input:

USB (Type-B USB1: PC/mobile phone decoding; Type-A USB2: USB flash drive direct reading)/HDMI ARC (TV audio return.) /Optical/coaxial (SPDIF, supports 24bit/192kHz)

Analog input：RCA (input/output multiplexing)

Wireless input：Bluetooth 5.4 (aptX Lossless transmission, delay <50ms)

3、Output interface
Main channel: stereo output (20Hz-20kHz full frequency band)

Low pass filter: independent subwoofer interface (40-200Hz adjustable, crossover point can be set)

RCA multiplexing: converted to pre-stage output in non-input state (sound source sharing mode)

4、Working mode
D-F mode (decoding mode, The sound source is output from the DAC, bypassing NJW1194, and the volume is not adjustable)

D-B mode (decoding mode, the sound source is output from the DAC, passing through NJW1194, and the volume is adjustable)

A-F mode (amplifier mode, the sound source is output from the DAC, bypassing NJW1194, and the volume is not adjustable)

A-B mode (amplifier mode, the sound source is output from the DAC, passing through NJW1194, and the volume is adjustable)

5、RCA Technical Parameters

5.1  RCA @4Ω  5W

5.2  RCA @4Ω  110W

5.3  RCA 4ohm 5W  Signal to Noise Ratio

5.4  RCA 4ohm 110W Signal to Noise Ratio

6, XMOS USB Technical Parameters

6.1  USB @4Ω  5W

6.2  USB @4Ω  110W

6.3  USB 4ohm 5W Signal to Noise Ratio

6.4  USB 4ohm 110W Signal to Noise Ratio

7.  PFFB  4ohm and 8 ohm frequency response

8.  Noise  FFT