It appears the TS unbalanced INs are Hi Z only... So Mic XLR, Balanced Line TRS and Unbalance Guitar TS Hi Z only, but no TS unbalanced line level and no RCA unbalanced line level INs for unbalanced Synths. You guys are probably OK with this as you may use DI Boxes on your unbalanced line level stuff but for a small desk studio with short runs it seems a missed opportunity...