Can you convert balanced inputs to RCA inputs help

2nd the above, however, you can usually find the bat adaptors for sale on audiogon from time to time...

If you want to make an input adaptor, connect the center conductor of the unbalanced shielded cable to pin 2 of the balanced XLR connector. Connect the shield of the unbalanced shielded cable to pin 1 of the balanced XLR connector. Connect a jumper from pin 3 to pin 1 of the XLR connector.

The above assumes the US standard.

There are two penalties for using the adaptor. First you lose 6db of gain. This won't be an issue if your preamp is active and provides reasonable output levels.

The second penalty is that you lose the theoretical noise rejection provided by a true balanced connection.

I would suggest getting a pre/pro with balanced output rather than using an adapter. The Aragon amp has fairly low input sensitivity so you'll need a pre/pro with high output for the amp to reach its maximum power. I think with RCA outputs, you'll only get 50% of the output power of the amp.
At one time, I was interested in the amp also but didn't buy it for this reason. I had confirmed it with a tech at Aragon.

Joe, an XLR to RCA adaptor is available from Milestek for $9.90.

http://www.milestek.com/frameset.asp?sPage1=topframe.htm&sPage2=productstart.htm

It's a high quality Neutrik item.

Get the balanced buddy from Rane. Its a passive transformer, so you still have the benefits of the balanced line.