Topping D900 Hi-Res DAC Preamp - Self-Developed PSRM Module BT 5.1 Support LDAC 10 Band PEQ Aurora UI with Remote Control — Open-Box, 25% Off

👍 Self-developed PSRM module ▶️ PSRM is a discrete 1-bit decoding architecture composed of an ultra-high-speed switching logic array and precision voltage references. TOPPING pioneered a stable, noise-free, purely resistive reference power design. This synergy between the reference power supply and switching logic enables the D900 to reproduce the original audio signal with astonishing fidelity, achieving harmonic distortion below -140dB and a SNR of 131dB. 👍 Brand new I/V conversion ▶️ A brand new I/V conversion circuit is designed for higher quality audio reproduction. The proprietary I-V circuit is composed of low-distortion integrated operational amplifiers and ultra-low noise discrete components carefully selected after repeated testing. This ensures that the voltage output of the PSRM remains pristine, providing ample dynamics and an immersive sound experience. 👍 An extensive array of digital inputs ensures broad compatibility with virtually all your source devices. ▶️ Whether connecting via USB-C, USB-B, optical, coaxial, Bluetooth, AES, or IIS-LVDS, the D900 effortlessly accommodates computers, CD players, digital transports, or gaming consoles. These sources can then benefit from the D900's high-performance DAC output, forming the heart of a true high-end audio chain when paired with equally capable amplification components. 👍 An independent and dedicated preamplifier circuit expands the D900's versatility in floorstanding speaker systems. ▶️ The high-precision volume control with 0.5 dB steps enables exceptionally smooth and refined volume adjustments, ensuring a comfortable listening experience. 👍 Responsive control ▶️ A 2-inch full-color display provides clear real-time playback information. On the right, three touch-sensitive buttons work seamlessly with the volume knob to enable fast and intuitive adjustments. With a simple operation, you can effortlessly switch between multiple display modes—such as playback information, FFT spectrum, or VU meter—providing real-time feedback on audio performance. The D900 also offers a choice of 9 background colors, allowing you to tailor the visual interface to your personal aesthetic preferences. TOPPING D900 DAC parameters (LineOut/USB In@96kHz)

XLR（Line Out）
THD+N @A-wt: <0.000055% @1kHz
THD @No-wt 45kBw: <0.00015% @20-20kHz
SNR @A-wt: 131dB @1kHz
Dynamic Range @A-wt: 131dB @1kHz
Frequency Response: 20Hz-20kHz(±0.3dB) , 20Hz-40kHz(±1.0dB)

Output Level: 4.2Vrms @0dBFS (4V Mode) , 5.2Vrms @0dBFS (5V Mode)

Noise @A-wt: <1.5uVrms
Channel Crosstalk: -147dB @1kHz
Channel Balance: 0.3 dB
Output Impedance: 100Ω

XLR（PRE）
THD+N @A-wt: <0.000055% @1kHz
THD @No-wt 45kBw: <0.00015% @20-20kHz
SNR @A-wt: 131dB @1kHz
Dynamic Range @A-wt: 131dB @1kHz
Frequency Response: 20Hz-20kHz(±0.3dB) , 20Hz-40kHz(±1.0dB)

Output Level: 10.5Vrms @0dBFS (4V Mode) . 13.0Vrms @0dBFS(5V Mode)

Noise @A-wt: <1.6uVrms
Channel Crosstalk: -147dB @1kHz
Channel Balance: 0.3 dB
Output Impedance: 100Ω