Lexicon MPX 550 - Manual (Page 25)

Getting Started
MPX 550
1-9
4. S/PDIF IN and OUT
Provide digital audio input and output. Two RCA
S/PDIF connectors are available. The unit accepts
inputs at 44.1 or 48kHz.
5. ANALOG OUTPUTs
Provide analog audio output. Balanced outputs are
available on either XLR or 1/4 inch Tip/Ring/Sleeve
connectors.
6. ANALOG INPUTs
Provide analog audio input. Balanced inputs are
available on either XLR or 1/4 inch Tip/Ring/Sleeve
connectors.