Amazon.com: RCA Line Audio Output Converter: Speaker to Line Level Converter Convert Speaker Level Outputs to Line Level Signals Allow Speaker Line to Connect to Auxiliary Inputs of Portable Sound Systems :
Response Speaker (High Level) to Line Level Converter | Jaycar Electronics
Calrad 10-106 Speaker Level to Line Level Converter | Calrad Electronics
Amazon.com: XANTECH SLLC1 Speaker Level To Line Converter (Discontinued by Manufacturer) : Electronics
SP-2SX | Jensen Transformers
PlugNPlay High Level Speaker to Low Level RCA Line Output Converter For Manufacturers Looms in BMW | Mercedes | Seat | Skoda | Vauxhall | Volkswagen
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
Russound - ADP-1.2 Speaker to Line-Level Adapter
Auto Car RCA Output Stereo Speaker High to Low Level Converter with Delay Function Speaker Level Converter Speaker Level
Car Speaker RCA Line Level Converter Car Stereo Audio Output Converter & Wiring | eBay