Description
DS18 DIA-CARBON18.2D
The DIA-CARBON18.2D is a premium 18-inch high-excursion car subwoofer engineered for massive, earth-shaking bass and extreme low-frequency performance. It features an ultra-rigid carbon fiber cone and dust cap that reduce distortion and improve responsiveness for clear, powerful lows. With dual 2 Ω voice coils, a massive 425 oz ferrite magnet, and 3.5″ aluminum CCAR voice coils with advanced heat dissipation, this subwoofer handles up to 3500 W RMS and 7000 W peak power — making it ideal for SPL competitions and serious audio enthusiasts. Its wide frequency response (10 Hz to 200 Hz) and high-excursion design (22.5 mm Xmax) deliver deep, immersive bass that fills the cabin with rich low-end impact. The DIA-CARBON18.2D also includes heavy-duty push terminals and a durable aluminum basket for long-lasting performance in custom sealed or ported enclosures.
Specifications
| Parameter | Value |
|---|---|
| Nominal Diameter | 18″ / 457 mm |
| Nominal Impedance | 2 + 2 Ohms |
| RMS Power Handling | 3500 W |
| MAX Power Handling | 7000 W |
| Sensitivity (1W/1M) | 85 dB |
| Frequency Response | 10 – 200 Hz |
| Recommended Low-Pass Crossover | 60 Hz |
Features
| Parameter | Value |
|---|---|
| Improved Heat Dissipation | Yes |
| Cone Shape | Conic |
| Speaker Terminals | Push Terminals (4 ga) |
Motor Specifications
| Parameter | Value |
|---|---|
| Voice Coil Diameter | 3.5″ / 89 mm |
| Voice Coil Former Material | Aluminum |
| Winding Material | CCAR |
| Cone Material | Carbon Fiber |
| Dust Cap Material | Carbon Fiber |
| Dust Cap Size | 8″ / 200 mm |
| Surround Material | Foam |
| Spider Diameter | 9″ / 228 mm |
| Leads Connection Type | Spider Crossed |
| Basket Material | Aluminum |
| Basket Color / Finish | Aluminum / Black |
| Magnet Material | Ferrite |
| Magnet Weight | 425 oz |
Thiele & Small Parameters
| Parameter | Value |
|---|---|
| Equivalent Volume (Vas) | 50.62 L / 1.787 ft³ |
| Excursion (Xmax, one way) | 22.5 mm |
| Free Air Resonance (Fs) | 35 Hz |
| Mechanical Factor (Qms) | 7.128 |
| Electrical Factor (Qes) | 1.1 |
| Total Factor (Qts) | 0.958 |
| Moving Mass (Mms) | 746.2 g |
| Compliance (Cms) | 26.1 mm/N |
| BL Factor | 24.6 |
| Voice Coil Inductance (Le) | 1.76 mH |
| Diaphragm Area (Sd) | 1164 cm² |
| DC Resistance (Re) | 2 + 2 Ohms |
| Efficiency Bandwidth Product (EBP) | 31.8 |
Recommended Enclosures
Sealed Enclosure
| Parameter | Value |
|---|---|
| Internal Volume | 90 L / 3.2 ft³ |
| Sealed Box Output Response (F3) | 32 Hz |
Ported Enclosure
| Parameter | Value |
|---|---|
| Internal Volume | 212 L / 7.5 ft³ |
| Port Size (W × H × L) | 4″ × 18″ × 20″ |
| Port Tuning Frequency (Fb) | 30 Hz |
| Ported Box Output Response (F3) | 22 Hz |
Measurements
| Parameter | Value |
|---|---|
| Overall Diameter | 18.5″ / 470 mm |
| Overall Depth | 14″ / 355 mm |
| Front Mount Baffle Cutout | 16.75″ / 426 mm |
| Mounting Depth | 12.15″ / 309 mm |
| Motor Diameter | 9″ / 230 mm |
Product Overview
18″ High Excursion Subwoofer with Carbon Fiber Cone | 2-Ohm
The DIA-CARBON18.2D delivers earth-shaking bass with 3500W RMS and a peak of 7000W. This 18-inch sub moves massive air for SPL competitions and serious audio enthusiasts.
Lightweight Carbon Fiber
Its ultra-rigid carbon fiber cone and dust cap reduce distortion and improve responsiveness, delivering clear, tight lows even at extreme volumes.
True High-Excursion Design
With an impressive 22.5mm Xmax, the DIA-CARBON18.2D provides deeper cone travel for louder output and immersive, chest-thumping bass.
Engineered to Stay Cool Under Pressure
Massive 3.5″ dual aluminum CCAR voice coils and pro-grade motor structure with advanced heat dissipation keep your subwoofer running strong through long, loud sessions without thermal shutdown.
Built Tough for High Performance
Featuring a 425 oz ferrite magnet, sandblasted aluminum basket, foam surround, and heavy-duty 4GA push terminals, this subwoofer is engineered for reliability and powerful SPL builds.
Versatile Enclosure Recommendations
Optimal performance in sealed (3.2 ft³) or ported (7.5 ft³ with 4″x18″x20″ port) boxes, allows you to build the way you prefer.
Dominate any venue with Black Diamond’s DIA-CARBON18.2D!
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