Grommes-Precision CV-600 25V, 70V, Or 100V To 600 Ohm/Line Level Converter | Full Compass Systems
DIY Line Level Converter for cheapie amps so you can use a powered sub - Techtalk Speaker Building, Audio, Video Discussion Forum
Headphone attenuation adapter | DIY-Audio-Heaven
Line Output Converters
BOSS B65N Speaker Level to Line Level Output Converter
70V to Unbalanced Line-Level Conversion | Radio Design Labs
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
Jensen Transformers SP-2SX X 2-Channel Speaker To Line Level Converter | Full Compass Systems
Line Output Converters
Speaker-level inputs or line output converter (LOC)?
Amazon.com: Speaker RCA Line Level Converter Adaptor High Low Hi Lo with Gain Control Add : Electronics
Russound ADP-1.2, Speaker-Level to Line-Level Stereo Converter — Blue Star Wholesale Distributors | Miami | Orlando
Subwoofer circuit: Going from speaker level to line level | diyAudio