While I agree with others that the MC402 will not have a problem "driving" the 803D's, my question would be is it what you want. The 402 is soft in the bottom end, in my opinion, and the fact you want something for Rock music has me thinking you may prefer another avenue.
Nonetheless, if you contact McIntosh I suspect they will give you the specs you desire.
Nonetheless, if you contact McIntosh I suspect they will give you the specs you desire.