Topping Pro's Interface range is designed to get the best possible results from headphones, so even for hard to drive models you won't need an external headphone amp. The E2x2 headphone output has up to 580mW of power and a Hi/Lo gain switch.
It is equally suitable for high impedance models as ones with low impedance and low sensitivity such as HEDDphones, or many Hifiman & Dan Clark planar magnetic headphones that struggle on most interfaces and require a dedicated amp. In comparison, most similar priced interfaces have a max output power of between 25 & 150mw. Low noise inputs Topping have implemented extremely low noise (-128dB EIN) microphone and instrument preamps that would not be out of place on high end premium interfaces, even low output dynamic mics like the SM7B work fantastically well without the need for an external preamp. All of the Topping interface stock at Scan are revised models with the increased 1.5K input impedance. Samples rates of up to 192kHz 24 Bit / are supported on Mac & PC, but there is also iOS and Android compatibility when using a standard external USB power supply. The additional power supply also means that any particularly challenging, power hungry condenser mics would be no issue on any platform. 1 x Headphone (TRS 6.35mm Jack) 2 x XLR / Jack Combo.2 x 6.35mm (1/4) TRS Jack.