Down4Sound TCX 15" Subwoofer 2700W RMS
Many in-stock orders ship within 1-2 business days, but timing varies by item. Custom, built-to-order, oversized, special-order and supplier-direct products may need extra processing time. Free shipping applies to qualifying orders over $99 in the contiguous US. Approved returns may be subject to a restocking fee.
Most products are covered by the manufacturer's warranty against defects. Damage from over-powering or improper installation isn't covered — we'll help coordinate any valid claim.
Tell us your vehicle, subwoofers and electrical setup and our team will help you match the right gear. Reach out before you buy.
Subwoofer Wiring Diagram
Select your configuration to view possible wiring combinations.
Loading wiring diagrams…
Diagrams are on our wiring diagram page.
The DOWN4SOUND TCX 15” Subwoofer D2 is engineered for high-performance bass with long-lasting durability. Whether you’re building a street banger or a full demo wall, the TCX-15 D2 delivers aggressive output with clean, deep low-frequency response.
With a true 2700W RMS rating, a 3-inch 8-layer flat aluminum voice coil, carbon fiber cone, and a massive 5-stack Y35 ferrite motor, this subwoofer delivers the perfect balance of power, control, and precision. A vented backplate, rear gap venting, and dual flared pole vents keep the coil running cool even during sustained high-power use.
Key Features
- 2700W RMS power handling
- Dual 2-ohm voice coil (D2)
- 3-inch 8-layer flat aluminum voice coil
- Carbon fiber cone
- ~39 mm one-way Xmax
- 5-stack Y35 heavy-duty motor
- Stitched high-roll surround
- Triple-spider suspension
- Rear gap and fully vented motor & backplate for cooling
Technical Specifications (T/S Parameters)
- Resonance Frequency (Fs): 28.9 Hz
- Qms (Mechanical Q): 4.91
- Qes (Electrical Q): 0.50
- Qts (Total Q): 0.46
- Total Moving Mass (Mms): ~608.7 g
- Suspension Compliance (Cms): ~49.8 μm/N
- Equivalent Volume (Vas): ~37.7 L
- Sensitivity (SPL): 84.3 dB @ 1W / 90.5 dB @ 2.83V
- Xmax: ~39 mm (one-way)
- Driver Displacement: ~0.22 cu ft
Engineering and Construction
- Extended pole piece for clean, linear throw
- Dual flared pole vents for reduced turbulence
- Rear gap and motor venting for improved thermal regulation
- Precision-wound 3″ 8-layer flat aluminum voice coil (bifilar) on a 0.3 mm anodized aluminum former
- Carbon fiber cone for rigidity and reduced flex
- Built to survive high power, long sessions, and real-world abuse
Recommended Enclosure
- Ported: 3.25 – 4.0 cu ft
- Recommended Tuning: 30–32 Hz
Optimized for deep, aggressive low-frequency output
Physical Dimensions (Key Installation Specs)
- Mounting Cutout Diameter (Through Cut): 14.25 in (361.95 mm)
- Overall Cutout Diameter (Flush-Mount Recess): 15.39 in (391 mm)
- Mounting Depth: 13.50 in (342.9 mm)
- Motor Diameter: 9.45 in (240 mm)
- Net Weight: 101.41 lb
- Gross Weight: 109.35 lb
Authorized Down4Sound dealer at JS Ultimate Sounds. Free shipping on orders $99+.
