MRM-LO  Twin balanced /  unbalanced line out. MRM-AMP  Twin channel  20W/ch power  Amplifier.  (Uses external  24V PSU) (Not currently available) MRM-DO  2 Channel, S/PDIF  digital output with  both RCA & Toslink Connectors (Not currently available) MFM-MM  For use with MFM-PL Providing a local  headphone output  as well as a feed for  the MRM-LO & MRM-AMP