LINE OUTPUT CONVERTERS & GRND LOOP ISOLATORS

4-Channel High-to-Low Converter RF-HLC4 Use the RF-HLC4 high-to-low signal converter to connect 4-channel amplifiers to radios without RCA outputs.

Metra Electronics AGL3.5 Ground Loop Isolator 3.5 mm Ground Loop Isolator

AX-ADCT2 2 Channel Differential Converter

AudioControl LC2i 2-channel line output converter for adding amps to your factory system (Black)

LC6i AUDIOCONTROL 6CH LINE OUT CONVERTER

2-Channel High-to-Low Converter RF-HLC