If I accurately understand your question, you wish to connect an RCA (line level) to permit use of speakers terminated with banana plugs. May I suggest using a Fosi Audio TB10D? I purchased the unit on Amazon for under $70. It is a simple mini power amp equipped with volume, treble, bass control, and a 32V/5A power supply. I have a JVC VHS/DVD player and inserted the RCA connectors and speaker banana plugs into the TB10D to power a set of 4 ohm MartinLogan towers.
Best Sounding Adapter - Making RCA into Banana or Spade? Thanks!
Thanks in advance for your thoughts / suggestions - much appreciated! :-)