TOPPING D900 User Manual

Model: TP335 | Version: 1.0

Introduction

This user manual provides comprehensive information for the TOPPING D900 Digital-to-Analog Converter (DAC). It covers features, operation, setup, specifications, and performance test results.

The D900 supports various inputs: USB, IIS, Coaxial, Optical, AES, and Bluetooth. For drivers and updates, visit: https://www.toppingaudio.com/zh/downloads.

Package Contents

D900 Host Unit x 1
Remote Control x 1
USB Data Cable x 1
AC Power Cable x 1
Bluetooth Antenna x 1
Product Information Card x 1

Product Attributes

Attribute	Value
Dimensions	33.0cm x 5.7cm x 21.0cm
Weight	2.52 Kg
Power Input	100-240VAC 50Hz/60Hz
Signal Input	USB-B/USB-C/BT/OPT1/OPT2/COAX1/COAX2/AES/IIS
Line Out Output	XLR (Line Out), XLR (PRE)
Other Connectors	12V Trigger In/Out (3.5mm jack)
Bluetooth Range	>10 meters
Display	2.0-inch LCD Color Screen
Standby Power Consumption	<1W
Operation Power Consumption	<10W

Supported Specifications

Input	PCM	DSD	PEQ
USB IN	44.1kHz-768kHz/16bit-32bit	DSD64-DSD512 (Native), DSD64-DSD256 (DoP)	44.1kHz-192kHz/16bit-24bit
IIS IN	44.1kHz-768kHz/16bit-32bit	DSD64-DSD512 (Native), DSD64-DSD256 (DoP)	-
COAX/OPT/AES IN	44.1kHz-192kHz/16bit-24bit	DSD64 (DoP)	44.1kHz-192kHz/16bit-24bit
BT IN	AAC/SBC/APTX/APTX HD/APTX-Adaptive/LDAC	-	44.1kHz-96kHz/16bit-24bit

Parts and Names

Front Panel

Display: Shows status and settings.
Menu Button: Navigates menus.
Input Channel Switching: Cycles inputs.
Home Page Switching: Cycles display modes (Normal, VU, FFT).
Remote Receiver: IR receiver.
Volume Knob & Button: Adjusts volume; press for custom functions.

Rear Panel

XLR Outputs: Balanced Preamp and Lineout.
Digital Inputs: IIS, AES, Coaxial, Optical.
Wireless Input: Bluetooth.
USB Inputs: USB-B, USB-C.
12V Trigger In/Out: For synchronized power control.
Power Input, Fuse, Power Switch.

Remote Control

Controls Standby, Mute, Volume, Input/Output switching, Menu, PEQ, and Trigger functions.

Operation

Power: Rear switch for on/off; front knob or remote for standby/wake-up.

Volume: Adjust with front knob or remote. Mute available. DAC mode volume is fixed at 0dB.

Input/Output Switching: Cycle through sources and outputs using front panel buttons or remote.

Setup Menu

Configure device settings via front panel buttons or remote control. Key options include Display customization, USB/Input/Output selection, Power Trigger modes, PEQ settings, IIS configuration, Advanced adjustments (Channel Balance, Output Level, etc.), Language, and Factory Reset.

Specifications

D900 DAC Parameters (LineOut/USB In @ 96kHz)
Parameter	XLR (Line Out)	XLR (PRE)
THD+N @A-wt	<0.000055% @1kHz	<0.000055% @1kHz
THD @No-wt 45kBw	<0.00015% @20-20kHz	<0.00015% @20-20kHz
SNR @A-wt	131dB @1kHz	131dB @1kHz
Dynamic Range @A-wt	131dB @1kHz	131dB @1kHz
Frequency Response	20Hz-20kHz (±0.3dB) 20Hz-40kHz (±1.0dB)	20Hz-20kHz (±0.3dB) 20Hz-40kHz (±1.0dB)
Output Level	4.2Vrms @0dBFS (4V Mode) 5.2Vrms @0dBFS (5V Mode)	10.5Vrms @0dBFS (4V Mode) 13.0Vrms @0dBFS (5V Mode)
Noise @A-wt	<1.5uVrms	<1.6uVrms
Channel Crosstalk	-147dB @1kHz	-147dB @1kHz
Channel Balance	0.3 dB	0.3 dB
Output Impedance	100Ω	100Ω

*Test data from TOPPING laboratory at 5V output mode.

Test Results Summary

Performance tests include Scope, FFT, THD+N, SINAD, Frequency Response, SNR, Dynamic Range, Jitter, IMD, and Mutitone analysis. Results consistently show very low distortion, high signal-to-noise ratios, and wide dynamic ranges, indicating excellent audio fidelity.

Troubleshooting & Precautions

Refer to the TOPPING website FAQ for troubleshooting (https://www.toppingaudio.com/zh/faq) or contact support at service@tpdz.net. Follow precautions regarding environment, warranty, and usage.

FCC Warning

Complies with FCC Part 15. Avoid harmful interference. Modifications void warranty. Tested to Class B limits for residential installations. Follow installation guidelines for RF exposure compliance (min. 20cm distance from body).

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