McIntosh 6500 as a preamp?

I currently own a McIntosh MA 6500; love it and I am able to push my current speakers (B&W 805Di's) without issue. I am wondering because their is an 'amp out option' on the back of my integrated; whether or not an MC 252 or 402 could be added without degradation of sound to push larger 800's- until a proper C22 is afforded and available in the never ending climb of upgrades? Sorry, if this a really lame question; but thank you in adavance.