The product is amazing in all aspects, it is very powerful, no need to add on that, but it is not suitable for high impedance Headphone, I have two 250 ohms beyerdynamic 770 and 990, the headphones out sound coming from the Focusrite is very weak and not enough for high impedance Headphone, I have bought the Focusrite after reading in their website that with 8i6 model if the device was connected to power it will be suitable to operate 600 ohms headphones, and this information is not precise. They should have mentioned that you will be able to hear sound from your high impedance headphones, but the sound may not be enough for your liking. or you will get 10% of the required power to operate your high impedance headphones.
Anyway, for my 32 ohms AudioTechnics it is working fine, and it is working seamlessly with my KRK Rokite 8 Monitors, the main output is very powerful, 30% of it blows my studio apart.