Topping D900Discrete 1bit DAC Bluetooth 5.1 LDAC 32bit 768kHz DSD512
The Topping D900 pushes the boundaries of audio fidelity with an exclusive 32-phase DSM (Discrete Sigma Modulation) architecture. A true showcase of Topping's technological know-how, this top-of-the-range DAC combines digital precision, organic musicality and total flexibility to sublimate all your sources. It supports high-resolution sampling rates up to PCM 32bit 768kHz and DSD512. Its digital-to-analog conversion stage is supported by an Altera Max II CPLD and Accusilicon 45MHz/49MHz clocks. Numerous features are available, such as Bluetooth 5.1 supporting LDAC, and a 10-band parametric equalizer accessible via the “Topping Tune” application. When it comes to connectivity, the D900 is well equipped with digital inputs for a wide range of configurations, while its outputs include two balanced XLR outputs: a line output and a preamp output.
Topping D900: A discrete digital-to-analog conversion stage
The D900 is based on a 1bit PSRM discrete digital-to-analog conversion module. This circuit preserves the integrity of the signal while the DAC is working, enabling it to offer exceptional performance, with THD+N below -140dB and SNR of 131dB. This Topping DAC also incorporates a new I/V conversion circuit for high dynamics and an immersive sound experience.
Topping D900: 2" screen with Aurora UI
On the front of the D900 is a beautiful color screen, powered by Topping's Aurora UI interface, for the ultimate user experience. This interface allows you to display all the information on the current playback, easily navigate through the device's parameters, and display an FFT spectrum or various vumeters. Added to this is a premium-quality, aluminum-bodied remote control.
Topping D900 : Bluetooth 5.1 LDAC
In terms of connectivity, Topping has chosen to integrate a latest-generation Qualcomm QCC5125 Bluetooth receiver chip. As a result, the D900 supports high-resolution Bluetooth transmission codecs SBC, AAC, aptX, aptX-HD, aptX-Adaptive and LDAC. LDAC 24bit 96kHz, superior to standard CD quality, offers a reliable, stable and pleasant listening experience.
Topping D900: 10-band parametric equalizer
In addition to its many features, the D900 benefits from a new 10-band parametric equalizer for highly precise adjustment of frequencies and gain. This adjustment software offers the possibility of fully personalized rendering by the user.
Topping Tune will be available on MAC OS in the second half of 2025. It is currently only available for Windows.
Topping D900 overview
| 1 | Screen |
| 2 | Volume control / multi-function button |
| 3 | XLR preamp output |
| 4 | XLR line output |
| 5 | I2S input via HDMI |
| 6 | AES/EBU input |
| 7 | 2x Toslink optical input |
| 8 | 2x Coaxial input |
| 9 | Bluetooth antenna |
| 10 | USB-B input |
| 11 | USB-C input |
| 12 | In/Out trigger |
| 13 | IEC input / Power switch |
Technical characteristics
| Specifications | |
|---|---|
| Product type | DAC |
| DAC chip | PSRM circuit |
| Bluetooth chip | QCC5125 |
| CPLD | Altera Max II |
| Inputs | 1x USB-C 1x USB-B 2x Coaxial 2x Toslink optical 1x AES/EBU 1x I2S via HDMIBluetooth |
| Outputs | 1x XLR line output 1x XLR preamp output |
| Supported sample rates | PCM up to 32Bit 768kHz DSD up to DSD512 |
| Bluetooth version | 5.1 |
| Supported Bluetooth codecs | SBC, AAC, aptX, aptX-HD, aptX-Adaptive and LDAC |
| In/Out trigger | |
| DAC + Preamplifier function | |
| 10-band equalization | |
| Color display | |
| Interface | Aurora UI |
| XLR line output specifications | |
|---|---|
| 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 | 0.3dB |
| Output impedance | 100 ohms |
| XLR preamp output specifications | |
|---|---|
| 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 (+/-0.1dB) |
| Output level | 10.5Vrms @ 0dBFS (4V mode) 13Vrms @ 0dBFS (5V mode) |
| Noise @ A-WT | < 1.6Vrms |
| Channel crosstalk | -147dB @ 1kHz |
| Channel balance | 0.3dB |
| Output impedance | 100 ohm |
| General | |
|---|---|
| Color | Silver |
| Package | 1x Topping D900 1x Bluetooth remote control 1x Bluetooth antenna 1x Power cord |
