Focal K2 M High-End M-Profile 5KM 5.75-inch Subwoofer (Each) – Sounds Good Stereo Online
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Sound Storm Laboratories LOPRO8 Amplified Car Subwoofer - 600 Watts Max Power, Low Profile, 8 Inch Subwoofer, Remote Subwoofer C
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Amazon.com: Pyle 8-Inch Low-Profile Amplified Subwoofer System - 600 Watt Compact Enclosed Active Underseat Car Audio Subwoofer with Built in Amp, Powered Car Subwoofer w/Low & High Level Inputs PLBX8A : Electronics