Is topping A90 fully balanced?
The A90 is a full-sized desktop headphone amplifier and preamplifier, with fully-balanced circuitry.
Can topping A90 power Susvara?
Being one of the most powerful headphone amps at this price and size has its perks, as you can drive pretty much everything that has a headphone plug. You can include notorious low-sensitivity headphones as Hifiman Susvara, Abyss AB-1266 and Audeze LCD-4 to this list.
Can topping A90 drive speakers?
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.