Description
DS18 DIA-CARBON18.1D
The DIA-CARBON18.1D is a premium 18-inch high excursion car subwoofer designed to deliver massive, deep bass and extreme low-frequency impact for serious audio enthusiasts and SPL-level systems. Built with an ultra-rigid carbon fiber cone and dust cap, it minimizes distortion while providing rapid response and powerful lows that you can feel. Featuring dual 1 Ω voice coils, a 3.5-inch aluminum CCAR voice coil with advanced heat dissipation, and a 425 oz ferrite magnet motor structure, this subwoofer handles up to 3500 W RMS and 7000 W peak power with durability and precision. Its wide frequency range from 10 Hz to 200 Hz and large 22.5 mm Xmax excursion make it ideal for sealed or ported enclosures, delivering authoritative, chest-thumping bass that elevates your entire sound system.
Specifications
| Parameter | Value |
|---|---|
| Nominal Diameter | 18″ / 457 mm |
| Nominal Impedance | 1 + 1 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 | 1-Ohm
The DIA-CARBON18.1D 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-CARBON18.1D 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-CARBON18.1D!
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