Think there's an error in the description. The RCA outputs most likely have to go an amplifier, not to the speakers. So with this system you would need either an amp and speakers, or powered speakers, but regular passive speakers would not work since this unit does not appear to have an amplifier in it. Thanks
@ThomasGoedecke I have used analog > wireless solutions before and they're traditionally pretty bad because of the reencoding process... but this keeps the wireless transmission in digital format, only then doing the DAC process. Fundamentally, there shouldn't be any loss of fidelity in this process. Have you used this specific unit?