Specifications：

Model: D3 PRO
THD: ≤ 0.003%
SNR: ≥  93dB@5W  4Ω, 116dB@110W  4Ω
SINAD: 92dB@5W   4Ω, 86dB @110W  4Ω
Input Mode: HDMI ARC / BLUETOOTH/ USB /Optical/ Coaxial /RCA/ U Disk
Power Supply: 36V5A/48V5A/NO POWER
Working Voltage: 24V~ 48V
Terminating Impedance: 2-8Ω
Frequency Range: 20Hz - 20kHz
Output Mode: Passive speakers/Active subwoofer /RCA Output

 

This is a TPA3255 amplifier, and it is also an AK4493 decoder.

-RCA input/output multiplexing: RCA is not set to input status, but converted to pre-amplifier output (audio source sharing mode).

-There are four working modes:

 Decoding mode: D-F mode, D-B mode;

 Amplifier mode: A-F mode,  A-B mode.

 

Mini amplifier, Multiple inputs, Custom Tone, Big Power, Low Distortion

-TPA3255+PFFB technology: Eliminates load dependency.

-Full-scenario connectivity: HDMI ARC synchronizes volume with TVs, Bluetooth 5.3, optical fiber, coaxial, RCA, and USB multi-inputs create a 2.1-channel sound system.

-Powerful USB digital interface: XMOS XU316, supports up to 768kHz PCM and DSD525.

-DAC: AMK AK4493S.

 

HDMI ARC audio and video synchronization

--The volume can be adjusted in real time with TV remote control to create a home theater experience

 

Qualcomm QCC3084 Bluetooth5.4, supports LDAC/SBC/AAC/aptx/aptx-HD/aptx adaptive/aptx-lossless

--It can easily connect to smartphones, tablets, computers, tablets, etc., allowing you to easily enjoy the convenience and speed of wireless.

 

 

Powerful USB digital interface: XMOS XU316, USB Audio Amplifier for PC

--Supports up to 32-bit/768kHz PCM and DSD512.

--Provide high-fidelity audio for PC and laptops, making up for the lack of power and audio quality of built-in sound cards.

--You can also experience playing music by connecting a USB flash drive via an extension cable.

 

The AK4493S flagship DAC (supports PCM 768kHz/DSD512)

-TPA3255 PFFB amplifier (300W x 2 @ 4Ω) combine high-resolution decoding with pure amplification.

High-Quality Components

--Nippon Chemi-Con capacitor .

--4 single inductors.

--Nikon coupling capacitor, WIMA capacitor

Replaceable OP-AMP CHIP

--The OPA1656 op amp is standard

--it compatible with mainstream models and can be replacedfreely to meet personalized listening needs

 

PFFB solves load dependency

--PFFB technology eliminates load dependency, enhancing performance and sound quality significantly

 

2.1 channel audio system creation

--SW OUT output connects to active subwoofer, 

--Low-pass filter, adjustable from 40Hz to 200Hz

 

Audio control system

--NJW1194 electronic volume chip, supporting ±10dB bass and treble adjustment.

 

RCA Technical Parameters

RCA @4Ω  5W

 

RCA @4Ω  110W

 

RCA 4ohm 5W  Signal to Noise Ratio

 

RCA 4ohm 110W Signal to Noise Ratio

 

 XMOS USB Technical Parameters

USB @4Ω  5W

USB @4Ω  110W

USB 4ohm 5W Signal to Noise Ratio

USB 4ohm 110W Signal to Noise Ratio

 

PFFB  4ohm and 8 ohm frequency response

 

Noise  FFT