McCormack dna1 to Sony 1040

Without an exact model number of the Sony, all answers are just speculation. Assuming it is the STR-DN1040, then your options are practically non-existent. Sorry auxinput, I must disagree with your solution to use Zone 2. If you look closely at the manual, it states, "Adjust to a suitable volume using the receiver in zone 2." Since it says to use the component in Zone 2 for volume, obviously the Zone 2 is a fixed output. Doing this with the DNA1 is not advised and will likely cause damage. I agree with Matt to find a suitable preamp. There is a way to connect, however this will not do justice to the abilities of the DNA1 and should only be a temporary solution. You will need to use one of these adapters,

http://electronics.mcmelectronics.com/electronics/Speaker-To-Line-Level-Converter

Yes, tis49's suggestion will work, connect the Sony receiver front speakers outputs to a Speaker-level to Line-level Adapter then go to the DNA1 inputs.
https://www1.crutchfield.com/p_543ADP12/Russound-ADP-1-2-Speaker-level-to-Line-level-Adapter.html?tp...

The DNA1 can provide much better power to the speakers than the Sony! Same concept of Musical Fidelity 550k/750k supercharger.

https://www.stereophile.com/solidpoweramps/1208mf/index.html

@tls49 - well isn't that a heck of thing!!  Gotta read the fine print!  This is the first time I have seen a Zone 2 that does not control volume.  Huh.  This receiver, if it is a Sony STR-DN1040, is pretty useless for the OP's purposes.

Solution - Used basic tube preamp. Happy hunting!

How bout carver t24 preamp to hook the dna1 to