Down4Sound TCX 18” Subwoofer – Dual 1Ω (2700W RMS)

The Down4Sound TCX 18” D1 is the monster of the TCX lineup — built for extreme power, deep pressure, and unmatched low-end control. Featuring a 3-inch 8-layer flat aluminum coil, carbon fiber cone, stitched high-roll surround, and massive 5-stack Y35 ferrite motor, this subwoofer is designed to dominate any build.

Engineered with triple-spider suspension, a fully vented motor, and extended pole piece, the TCX 18” D1 handles huge excursion with precision and reliability. Perfect for demo vehicles, SPL builds, or anyone who wants insane low-end authority without losing sound quality.

Key Features:

• Oversized 5-stack Y35 ferrite motor for maximum output

• 3" 8-layer flat aluminum voice coil for extreme power handling

• Carbon fiber cone and stitched surround for long-term durability

• Fully vented motor, gap, and backplate for consistent cooling

• Triple-spider suspension for clean, linear cone movement

• Extended pole piece for smooth, controlled travel

• Designed for high-power daily or competition use

Specifications:

• RMS Power Handling: 2700W RMS

• Voice Coil: 3” 8-layer flat aluminum (bifilar)

• Impedance: Dual 1Ω (D1)

• Cutout Diameter: 430 mm / 16.93”

• Mounting Depth: 361.95 mm / 14.25”

• Weight: 116 lbs

• Xmax: ~36 mm (one-way)

• Motor Size: 240 mm / 9.45”

• BL: 27.216 T·m

• Resonance Frequency (Fs): 30.21 Hz

• Sensitivity: 83.9 dB

• Recommended Ported Enclosure: 5.5–6.5 cu ft tuned to 30 Hz

Precision Engineering:
With a BL rating of 27.216 T·m and a suspension built for long throw, the TCX 18” D1 moves serious air while maintaining accuracy. The rigid carbon fiber cone and high-roll surround allow for responsive, low-distortion performance at extreme levels.

Summary:
The TCX 18” D1 is made for those who live for pressure. It’s massive, efficient, and brutally loud — built to handle daily abuse or competition-level punishment without breaking a sweat.