Down4Sound TCX 18" Subwoofer D2

The Down4Sound TCX 18" D2 is built for extreme output, heavy power handling, and clean low-end delivery. Featuring a 3" 8-layer flat aluminum voice coil, carbon fiber cone, stitched high-roll surround, and an oversized 5-stack Y35 ferrite motor, this subwoofer is engineered to dominate both daily systems and competition builds.

With its triple-spider suspension, fully vented motor structure, and extended pole piece, the TCX-18 D2 is optimized for long throw and durability. From punchy lows to extended sweeps, it delivers consistent pressure and clean response without breaking a sweat.

Quick Notes

• RMS Power Handling: 2700W RMS
• Coil: 3" 8-layer flat aluminum
• Impedance: Dual 2Ω (D2)
• Cutout Diameter: 430 mm / 16.93"
• Mounting Depth: 369 mm / 14.53"
• Weight: 116 lbs (104.72 lbs net)
• Xmax: ~36 mm (one-way)
• Motor Size: 240 mm / 9.45"
• Extended Pole Piece: Smooth, linear travel
• Dual Flared Pole Vent & Gap Venting
• Fully Vented Backplate & Motor

Precision Engineering

With a BL of 27.216 T·m and a suspension designed for long stroke, the TCX-18 D2 handles massive air movement while maintaining clarity. The 8-layer aluminum coil resists heat saturation and delivers reliable performance in sustained high-output use. Its carbon fiber cone is both lightweight and rigid, providing fast response and flex-free accuracy — ideal for musical systems and SPL applications.

Technical Specifications

• Resonance Frequency (Fs): 30.207 Hz
• Sd: 113.411 cm²
• Mms: 620.257 g
• BL: 27.216 T·m
• Qms: 5.202
• Qes: 0.598
• Qts: 0.521
• No (Efficiency): 0.139%
• Sensitivity (SPL): 83.9 dB
• Vas: 24.882 L
• Cms: 39.745 µm/N
• Krm: 37.601 mΩ
• Erm: 0.553
• Kxm: 108.551 mH
• Exm: 0.623

Recommended Enclosure

• Ported Volume: 5.5 – 6.5 cu ft
• Tuning Frequency: 30 Hz

Why Choose the TCX 18" D2?

The TCX-18 D2 combines brute force and precision, delivering relentless low-end with thermal stability and clean response. Its massive motor, stitched surround, and vented structure make it a top choice for demo walls, competition systems, and daily builds that demand uncompromising bass.