And you'll need to be well past "crappy speakers" land for the DAC to matter. A good DAC helps with things like lower noise and better EQ at the extremities of the frequency range, and we're talking about 78's. Anytime a transducer (mic or speaker) is involved, it's the vast majority of your coloring right there.
You might want to try with a half-decent usb dac and a set of good headphones if the goal was an a/b test?