Originally Posted by RobRicketts
Sapphire 6 doesn't offer up much headroom (I'm not sure whether or not I have a faulty unit)
I doubt you have a faulty unit. All audio interfaces have the same headroom if I'm correct. They can only go to 0db full scale anything over that and your clipping. The problem is you probably don't know how to leave headroom when your mixing. Try adjusting the VU offset so the 0VU is equal to -16 peak (or even 0VU to -20 peak if you have a real hard time leaving head room) what this will do is make your ssl channels go into the red (even though there will be no clipping) faster, this helped me out alot. You probably turn all your faders up too high when you should probably turn them all down and turn your monitors up.