Ported sub box

2PCS Speaker Port Tube Bass Reflex Vent Connector 3-5" 35x80mm Subwoofer Woofer Box

Speaker Port Tube, Professional Woofer Box Accessories, Bass Tube Audio Subwoofer for Car

2X Speaker Port Tube Subwoofer Bass Reflex Tube Speaker Box Port Tube 60X110Mm

Speaker Cabinet Port Tube,Subwoofer Bass Reflex Tube,Ventilation Connector,Audio Woofer Box

8pcs Speaker Port Tube Sponge Speaker Bass Air Duct Plug Noise Reduction for Sound Box Speaker

2Pcs Speaker Port Tube Sponge Foam for Box Cabinet Ports Replacement Parts Components 72mm Dia 60mm

Speaker Port Tube Sponge Foam for Box Cabinet Ports Replacement Parts Components 110mm Dia 80mm

4PCS Speaker Port Tube Foam Multifunctional Speaker Sound Guide Tube Foam Bungs for Loudspeaker Box

10pcs Speaker Port Tube Sponge for Speaker Box Bass Air Port Speaker Cabinet Port Sponge Diameter

Speaker Box Port Tube Speaker Inverted Tube Port Speaker Guide Tube For 2Inch To 15Inch Speaker Bass Box Vent Speaker

Uxcell 6pcs X Speaker Port Tube Subwoofer Bass Box Tube Bass Woofer Box Speaker Box Bass Air Port for Speaker Cabinet 98x160mm/3.9 6.3" DJ/PA

Speaker Cabinet Port Tube, Bass Tube ,15cmx7.2cm Vent Ventilation Connector Box