What are the speaker outputs on my subwoofer for? - Quora
Subs
Amazon.com: Pyle 8-Inch Low-Profile Amplified Subwoofer System - 600 Watt Compact Enclosed Active Marine Underseat Car Subwoofer with Built in Amp, Powered Car Subwoofer w/Low & High Level Inputs PLMRSBA8,Silver : Electronics
Amazon.com: High to Low O Converter,Speaker Level Adapter,2 Channel High to Low O Converter Black Car Stereo Subwoofer with Power Amplifier Control Wire High to Low Converter Car O High to Low
How to Connect a Subwoofer: Low & High Level Connections | Home Cinema Guide
How do I connect my subwoofer to my amplifier? | AVForums