Amazon.com: Car Stereo Audio Speak Signal Hi-Low Converter for Auto Amp Subwoofer Amplifier CD Player High to Low Adapter : Electronics
FosPower Y Adapter [8 inch] 2 RCA (Male) to 1 RCA (Female) Stereo Audio Y Adapter Subwoofer Cable [24k Gold Plated] 2 Male to 1 Female Y Splitter Connectors Extension Cord - Walmart.com
Subwoofer adapter | AV-Connection
Sengled Wireless Subwoofer Adapter Works with Pulse C01-BR30NAAMPW - The Home Depot
SON ACA011: 2x Cinch to Cinch subwoofer adapter cable 0.2 m at reichelt elektronik
Canare Premium Powered RCA to RCA Subwoofer Cable (1')
QED Performance Y-SW Subwoofer Adapter at AV.com
Amazon.com: Add An Amp Amplifier Adapter Interface to Factory OEM Car Stereo Radio System for Select Vehicles - Add Subwoofer Bass Amp etc.- No Factory Premium Amp- Compatible Vehicles listed below :
SVS SoundPath Subwoofer Cable | RCA Cable for Audio
Add Aftermarket Amplifier Amp Subwoofer Sub to Factory Radio System Interface Adapter Wire Harness Inline Converter Fits Select Toyota Models 1987-2017 - Walmart.com
Amazon.com: NuIth Add an Amplifier Subwoofer Adapter Interface to Factory OEM Car Radio Select for Toyota Tacoma Corolla Tundra 2019-2021 w/Remote Turn on Wire 2 Channel RCA Line Output Converter Non JBL