Description

The DOWN4SOUND TCX 18” Subwoofer is built for extreme output, heavy power handling, and clean low-end delivery. With a 3″ 8-layer flat aluminum coil, carbon fiber cone, stitched high-roll surround, and oversized 5-stack Y35 motor, this sub was engineered to dominate.

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

QUICK NOTES:

• RMS Handling: 2700W RMS
• Coil Size: 3 Inch – 8 Layer Flat Aluminum
• Impedance: Dual 2 Ohm (D2)
• Cutout Diameter: 430 mm / 16.93 in
• Mounting Depth: 369 mm / 14.53 in
• Weight: 116 lbs (104.72 lbs without packaging)
• Xmax: ~36 mm (one-way)
• Motor Size: 240 mm (9.45 in)
• Extended pole piece for smooth, clean travel
• Dual flared pole vent and gap venting
• Fully vented backplate and motor
• Super High Performance 3″ 8-layer flat wire voice coil (bifilar) – 0.3mm anodized ALU former – winding width spec for 3.2″ (81mm) +/- 2mm

PRECISION ENGINEERING:
With a BL of 27.216 T·m and a suspension optimized for long stroke, the TCX-18 controls massive air movement while preserving clarity. The 8-layer coil resists heat saturation and delivers real power in sustained high-output applications.

Its carbon fiber cone is lightweight and rigid, allowing fast response without flex — ideal for both musical accuracy and SPL performance.

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 mOhm
• Erm: 0.553
• Kxm: 108.551 mH
• Exm: 0.623

RECOMMENDED ENCLOSURE:

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