The Topping DX9 Discrete is a flagship DAC and headphone amp featuring a 16-element PSRM one-bit discrete DAC, achieving 131 dB SNR and 0.00006% THD+N. Key specs include 7080 mW x 2 @32Ω headphone output via 6-channel NFCA, support for 32bit/768kHz PCM/DSD512, and extensive digital inputs including USB, IIS, and Bluetooth 5.1.