Topping D90 III Discrete uses a positive and negative 16-element DAC for each channel, achieving high performance indicators of THD+N<0.00006% and SNR>128dB. it is designed with an observation window at the DSM module for users to directly see the internal structure.
Topping D900 takes DSM technology to the extreme, using a positive and negative 32-element DAC for each channel, marking a new height in performance.
Of course still waiting for confirmation of true DSD Direct conversion