The TOPPING A90 Headphone Amp is the companion for the highly reviewed TOPPING D90 DAC. It is already receiving rave reviews on Audio Science Review. The A90 is an ultra-high-performance headphone amp that can also work as a pre-amp. It comes with three gain settings and has great performance numbers including <0.00006% THD+N, 145dB DNR, <0.2uVrms Noise, < 0.1-ohm output impedance, and 7200mW x 2 max output power.
The A90 comes equipped with NFCA modules (Nested Feedback Composite Amplifier), which along with ultra high-gain feedback technology provide excellent AC and DC performance. High output current capability of the A90 allows it to drive low impedance headphones with ease. Furthermore, ultra-low noise of 0.2uV and high dynamic range of 145dB drive the most sensitive IEMs without producing any audible noise or dark background.
For outputs, the A90 comes with a 4-pin XLR, a 4.4mm Balanced, and a 6.35mm Single Ended port. The Single-Ended 25V pp with Balanced 49V pp high output voltage along with high output current and less than 0.1-ohm output impedance, A90 is compatible with a wide range of headphones. It also comes with the three-step gain setting and a wide variety of sensitivity settings that allow the amp to drive sensitive IEMs to power demanding headphones.
Being equipped with NFCA modules, A90 can also work as a pre-amp. In pre-amp mode, the 20ohm single-ended output and the 40-ohm balanced output impedance make it easily compatible with various power amps. You can also connect the A90 with the D90 DAC in pre-amp mode to drive active speakers and create a high-performing sound system.