Inputds on an amp are almost always Mic(rophone) [150 ohms] or Aux(iliary) [15,000 ohms] - or occasionally Tel(phone) [600 ohms].

RCA connectors are almost always Aux.

Input from a phone system is usually through a WMT-1 (or similar) matching transformer. Was there a matching transformer on the NEC system?



Sam


"Where are we going and why are we in this hand basket?"