These products provide the right solutions when a ground loop won’t stop humming or an optical digital input is missing.
High-Low Line Level Converter "Baseline AD-5N"
Problem solver for sources which only have a speaker level output (no line output), e.g. mini-hifi-systems and for connection of active speakers to such sources
Galvanical decoupling between input- and output signal by means of an audio transformer
Level transformation from speaker level to line level