TOPPING D90 III DISCRETE
1-bit DAC

Topping's fully balanced desktop 1-bit DAC with discrete components. The D90 III Discrete, like the previous flagship D90 III SABRE, is an iterative model of the D90SE. 
 

A new look

The difference in appearance from the D90 III SABRE is striking: the D90 III Discrete has a transparent window in place of the PSRM module, allowing users to see the PSRM module directly from above.

Brand new PSRM module

The D90 III Discrete includes 16-phase PSRM modules for the left and right channels. 

The PSRM is a discrete 1-bit DAC (digital-to-analogue converter) module which uses an advanced architecture consisting of an ultra-fast switching logic array and a precision voltage reference, which is the core of the PSRM circuit. This configuration not only switches at amazing speed, but also preserves the integrity of the original signal. The components minimize any disturbance to the power supply, ensuring excellent performance and reliability.

The design of the voltage reference power supply is also crucial to ensure the accuracy of the analogue output. The digital logic switch switches on a nanosecond level with sharp rising and falling edges, which can generate disturbing noise. To solve this problem, a stable, noise-free, clean-resistance output power supply has been designed to allow each DAC component to achieve a highly accurate output. As a result, the original sound can be reproduced with amazing fidelity, achieving 130dB DNR and 131dB SNR.

Ultra low jitter

Incredible jitter distribution using CPLD for clock signal processing, signal processing and digital signal optimization.

Based on the jitter test often used by current measurement websites, the D90 Ill Discrete offers excellent performance with a low level of -157dB.

New I/V conversion

The brand new I/V conversion circuit is designed for high quality sound reproduction. The proprietary I-V circuit consists 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 intact, providing ample dynamics and an immersive sound experience.

Realistic reproduction

The D90 III Discrete reaches a new pinnacle in music reproduction, with THD+N < 0.00006%. All the sounds captured at the recording location are perfectly reproduced, and every detail of the music is carefully captured. The D90 III Discrete makes you feel like you're sitting in the studio.
 

10-band precise PEQ adjustment

We have developed a brand new PEQ setting* that supports ten customisable frequency bands. Topping's brand new PEQ algorithm and desktop software allows you to fine-tune the frequency, gain and bandwidth of each PEQ band. The software supports importing target and original curves and compensating curves with target curves. It can also save multiple profiles for easy switching.

*The PEQ is supported up to PCM 192kHz/32bit and all digital input interfaces except IIS support this function.

LDAC codec

Equipped with the QCC5125 chip, the D90 III Discrete supports Bluetooth 5.1 wireless connectivity and can support up to 96 kHz/24 bits. In addition, it fully supports LDAC/aptX-Adaptive/aptX/aptX HD/AAC/SBC and other audio encodings, allowing you to listen to high-quality music. A wireless music experience that goes beyond the CD level.

Plug and play

The D90 Ill Discrete has a wide range of compatibility and can be used on different operating systems such as Windows 10, Windows 11, MAC, Linux and iOS/Android. The USB hardware is based on the third generation XMOS XU316 and Thesycon driver (for Windows*, without driver for other systems). Stable and reliable. 
In addition, the USB input supports PCM768kHz/32bit and DSD512, which makes every detail come alive.

*Note: You only need to install and configure the driver for Windows ASIO applications.

Freely selectable output mode

The D90 III Discrete features multiple universal RCA single-ended outputs and professional XLR balanced outputs. You can switch output channels as required, or use both channels simultaneously. Whether you are connecting two different systems or need to use two audio signals at the same time, the D90 III Discrete provides a more convenient and efficient output method.

In addition to the more universal XLR 4V and RCA 2V outputs, the D90 Ill Discrete also features XLR 5V and RCA 2.5V outputs. By selecting XLR 4V and RCA 2V, multiple devices can be adapted. Extreme performance can be achieved with XLR 5V and RCA 2.5V.

IIS - Ultra-high specification signal input interface

The IIS interface is not HDMI, but a customized digital audio interface that supports PCM 768kHz /3 2bit and DSD512 native. The DAC IIS must meet the definition of a digital interface IIS interface. The D90 III Discrete supports the following IIS modes: DSD FLAG 15, DSD FLAG 14, IIS DSDR LRCLK, IIS DSDR DATA, IIS PHASE STD, IIS PHASE REV. Compatible with most digital interfaces*.

* Pin assignments are shown below.

Pre-amp function, direct connection to active speakers

In addition to the fixed output level DAC mode, the D90 III Discrete also features a "preamplifier" mode. 

In preamplifier mode, you can set the output volume of the D90 III Discrete and then connect it directly to a clean amplifier or active speaker. This saves the cost of a preamplifier. You can also control the volume of the D90 III Discrete with a remote control for added convenience.

Topping BC-15A Bluetooth remote

The 2.4G Bluetooth remote control can be usde without being obstructed by obstacles. Flexible and easy control, remotely! The remote control uses 2 AAA batteries or rechargeable batteries.

The AAA battery is not included in the package and must be purchased separately.
 

The best choice for A90 Discrete

Pair the D90 III Discrete DAC with the A90 Discrete headphone amplifier for a fully discrete, balanced pairing that can drive almost any headphone. Not only does this combination deliver an exceptional performance experience, but the design of the two models is uniformly aesthetically pleasing.
 

12V trigger

The D90 III Discrete is equipped with a 12V trigger output and input that supports synchronous power-up and shutdown by other devices.
 

Box contents

• D90 III Discrete
• BC-15A Bluetooth remote (without batteries)
• Bluetooth antenna
• USB-B date cable
• EU (Type F) power cable