TOPPING D90 DAC (Digital-to-Analog Converter)

The TOPPING D90 is a new class of DAC being produced by TOPPING that uses the latest AKM D/A chip, the AK4499. It is also equipped with an XMOS XU208 USB chip, AK4118 S/PDIF receiver chip, and a CPLD programmable logic chip. For drivers, it uses German Thesycon drivers. Finally, it comes with a pair of AccuSilicon 451584MHz and 49.1520MHz high-end femtosecond clocks. Specs on the AK4499 chip can be found here.

For inputs, the D90 has USB-B (XMOS), optical, coaxial, AES, IIS, and Bluetooth 5.0. For outputs, it has a single-ended RCA Stereo and a balanced XLR, which can be used one at a time or together simultaneously. The USB and IIS inputs support up to PCM32bit / 768 kHz and DSD512 Native. Optical, coaxial, and AES inputs support up to PCM24bit / 192 kHz. Finally, Bluetooth 5.0 input supports up to PCM24bit / 96 kHz LDAC.

It comes with a volume control function so it can be used both as a DAC and as a DAC/Pre-Amplifier. This volume control can be disabled to make the D90 function purely as a DAC that produces output levels of 4Vrms (XLR) and 2Vrms (RCA).

Review:

"I was quite stunned to find that D90 has such a clean and detailed performance, from the lowest bass to the highest treble, everything was there in spades and nothing would hide away from it." - Sandu Vitalie from Soundnews. Read the full review here.

• Inputs

• USB-B (XMOS)
• IIS LVDS (HDMI)
• Optical
• Coaxial SPDIF
• AES/EBU
• MQA (for MQA Version only)

• Outputs

• Balanced XLR

• Single Ended RCA

• D/A Chip: AKM AK4499

• USB Interface: XMOS XU208

• SPDIF Interface: AK4118

• Bluetooth: aptX HD, LDAC, 5.0

• Sampling Rates

• USB: PCM up to 32bit 768kHz / Native DSD up to DSD512 / DSD DoP up to DSD256
  
• IIS : PCM up to 32bit 768kHz / DSD up to DSD512
  
• Coaxial, Optical, AES : PCM up to 24bit 192kHz

• Output Voltage

• RCA : 2Vrms @ 0dBFS

• XLR : 4Vrms @ 0dBFS

• Dynamic Range (A-weighting): 128 dB