David,
I am not sure what you meant by "However, the noise level is a couple of db worse than the Delta 44". Did you mean the noise floor of the Behringer USB DAC vs. the Delta 44's noise floor, which would have nothing to do with the noise floor of the Ensemble?
If so, then your USB ADC/DAC is really very good! Likely the noise from the Ensemble with a decent antenna will be significantly higher than the Behringer sound card, so the sound card's noise is not degrading the system.
If I have misunderstood, please clarify.
73,
Roger
