No, you can't. There is more to an SQ versus SPL setup than where you set your gains. You would, at very least, need to be running an interchangeable port setup before id even consider agreeing that your system is 'both'. Not to down your system in any way, Im sure its nice.
But in the end, we are arguing semantics. I have no link to a definition of an SPL setup. So like I said, in the end its all in what the owner wants to call it. Silly as it may be.
BTW, 1000 watts on two 12's is a far cry from the example I gave.