I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone to measure the loudspeaker's frequency response in the farfield and an Earthworks QTC-40 mike for the nearfield responses, using the Sony SA-Z1's single-ended analog inputs. I also used the Earthworks microphone to measure the Sony speaker's farfield responses with the TosLink digital input.
Looking first at the digital inputs, the TosLink optical input accepted S/PDIF data sampled at rates up to 96kHz. The USB port operated in the optimal isochronous asynchronous mode, and Apple's USB…