Can XLR to RCA affect input impedance of amp?

My Proceed HPA-2 amp has an unbalanced input impedance of 11 ohms and a balanced input impedance of 100. Theoretically the higher input impedance would work better with my preamp (Hovland) which has a high output impedance. Problem is that although the Proceed has balanced inputs, the Hovalnd does not have balanced outputs. So I have two questions. First, would running an interconnect with XLR at the amp end and RCA at the preamp end (assuming that is even possible) increase the Proceed's input impednace? And, second, is there some sort of an adapter to change one end of an RCA interconnect to XLR?
Are you sure the input impedance is 11 ohms unbalance and 100 ohms balanced? They are way too low to be practical. Input impedances are usually measured in kilo ohms. Please recheck.
My mistake, I'm sure its Kohms.
you can buy xlr/rca adaptors from Milestek cost about $10 each.
In rereading my question, I realize I forgot to ask one more thing; or perhpas it needs to be asked in a different way. Even if the XLR to RCA adapter idea could be done, that isn't really balancing anything is it? And, therefore, doesn't that mean that increased input impedance for the amp could not be realized?
The impedance of a XLR input is usually specified as the sum of both pins (both phases). A XLR to RCA adapter usually gives you the positive phase of the signal (pin 2) and short the other phase (pin 3) to the ground (pin 1), and the impedance should be half as much (50K).
For what its worth I run prosilway mk2's xlr out of my capitole mk 1 cd direct into the rca's of my vtl monoblocks with cardas custom terminations at 60 clams.The xlr to rca's are fine and saved me from spending 200.00 on audiogon on rca interconnects.