Subwoofer JBL VTX G28 (Audio system for performance, DJ)
VTX G28 stackable subwoofers are... - JBL Professional | Facebook
PLAN] VTX G28 Subwoofer Dual 18" with internal plan measurement - YouTube
VTX G28 | JBL Professional Loudspeakers
JBL Professional - JBL is delivering big sound to multiple stages at #Summerfest2018, the largest music festival in the world. These JBL VTX G28 are some of the subs bringing deep bass