Car Speaker RCA Line Level Converter Car Stereo Audio Output Converter & Wiring | eBay
DIY Line Level Converter for cheapie amps so you can use a powered sub - Techtalk Speaker Building, Audio, Video Discussion Forum
Amazon.com: Scosche LOC80 Line Output Converter Adjustable Amplifier Add On Module for Car Stereo, 2-Channel Speaker Wire to RCA Adapter : Electronics
Line Output Converters
amplifier - Tap signal from TDA2822L, convert to line and instrument level - Electrical Engineering Stack Exchange
How To - Car Stereo - Nine Ways to Adjust Signal Level
Amazon.com: XANTECH SLLC1 Speaker Level To Line Converter (Discontinued by Manufacturer) : Electronics
Speaker-level inputs or line output converter (LOC)?
Russound - ADP-1.2 Speaker to Line-Level Adapter
Line Output Converters
Kicker 46KiSLOC K Series 2-channel line output converter (speaker wire to RCA) at Crutchfield
Russound ADP-1.2 Speaker-level to Line-level Adapter at Crutchfield
attenuator - Speaker to line level circuit and values needed please - Electrical Engineering Stack Exchange
Need speaker level converters for Titan II LE
Subwoofer circuit: Going from speaker level to line level | diyAudio
Amazon.com: Scosche LOC2SL Line Output Converter Adjustable Amplifier Add On Module for Car Stereo, 2-Channel Signal Sensing Speaker Wire to RCA Adapter with Remote Control Knob, Black : Electronics
Line level to phono input
Resistor ratings for line level converter | diyAudio