JBL GTO1504D Grand Touring Series 15" subwoofer with dual 4-ohm voice coils at Crutchfield
JBL 2262HPL 338312-004X 12" Neo Woofer
JBL PartyBox Encore | Portable party speaker with 100W powerful sound, built-in dynamic light show, included digital wireless mics, and splash proof design.
JBL GX Series 12" Single-Voice-Coil 4-Ohm Subwoofer Black GX1200 - Best Buy
JBL Partybox Encore Essential | Portable party speaker with powerful 100W sound, built-in dynamic light show, and splash proof design.
JBL Stage A120P Powered subwoofer at Crutchfield
For Jbl Boombox2 High-end 4 Inch 106mm Mid Bass Speaker Subwoofer 4ohm 40w Woofer Low Frequency Long Stroke 1pc - Speakers - AliExpress
JBL Club 1224 Club Series 12" component subwoofer with switchable 2- or 4-ohm impedance at Crutchfield
JBL PartyBox Encore Essential Portable Party Speaker | Abt
New JBL® Aftermarket Subwoofers Offer Deep Accurate Bass for Drivers | HARMAN