Rolls MB15b ProMatch 2-way XLR/RCA line-level converter at Crutchfield
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 :
Xantech SLLC1 Speaker Level To Line Level Converter | Full Compass Systems
Speaker (High Level) to Line Level Converter | Jaycar Electronics
Speaker Wire to RCA Hi/Low Adapter Converter Line Level Output Audio Video Car - Walmart.com
Line output converter, Hi to Low level adapter, Speaker to RCA converter ON SALE | eBay
BHi LLC1 - Stereo Line Level Converter LLC1 GigaParts.com
Jensen Iso-Max SP-2SX 2 Channel speakON Speaker Level to XLR Line Level Converter Adapter
Two Channel Speaker RCA Line Level Converter Adapter Car Audio High Low Rear | eBay
High To Low Line Level Adjustable Adapter Car Audio Amplifier Subwoofer Converter 2 Channel Speaker To Rca Converter - Car Audio Accessories/car Stereo Accessories - AliExpress
Aerpro 4 Channel Line Output Converter - Accessory - AP3044A | Supercheap Auto
2 Channel HI / LOW Level Converter High Level Speaker Output to RCA Line Level Adapter - AliExpress Automobiles & Motorcycles