Concrete Audio Ported 12″ Subwoofer Enclosure – Birch Wood Hatchback Box

Bring deeper, more powerful bass to your vehicle with the Ported Subwoofer Enclosure from Concrete Audio. This ported (bass-reflex) design is engineered to house a single 12″ subwoofer (C3 Series, or compatible C0/C1 Series), with the subwoofer and port firing up and toward the rear — ideal for hatchback installations where space and performance matter.

Built from 3/4″ birch wood with rounded port edges and a 1.5″ baffle, this rugged enclosure also includes oxygen-free copper wire screw-in terminal cups and poly fill to control internal resonance and smooth bass output. A black trunk liner finish adds durability and integrates cleanly with vehicle interiors. At approximately 14.25″ high × 33″ long × 15″ wide, this box is built to deliver room-filling low end with punch and authority.

Key Features:

• Designed for 1 × 12″ subwoofer (C3 Series & compatible with C0/C1)

• Ported (bass-reflex) design for increased low-frequency output

• 3/4″ birch wood construction for strength and acoustics

• Rounded port edges and 1.5″ baffle for optimized airflow

• Oxygen-free copper screw-in terminals for secure connections

• Poly fill for resonance control

• Black trunk liner for durability and clean look

• Dimensions: 14.25″ H × 33″ L × 15″ W