2026 NEW Black Diamond DIA-CARBON15.1D 15″ High Excursion Carbon Fiber Subwoofer 3500W RMS – 7000W MAX | 2-Ohm DVC – Competition-Grade Pro Audio Subwoofer for Extreme Bass

Features Motor Thiele & Small Parameters Recommended Enclosures Measurement

Massive Power for Ground-Shaking Bass Dominate the lows with an insane 3500W RMS / 7000W MAX power handling engineered for high-performance car audio systems that demand maximum SPL. This 15-inch subwoofer is built for bassheads who want competition-level output and deep, earth-rattling frequencies

Advanced Motor Design with 425 Oz Ferrite Magnet Unleash high-efficiency output and unmatched control with a 3.5" aluminum voice coil, carbon fiber cone, and a 425 oz ferrite magnet. The spider-crossed leads and improved heat dissipation ensure reliability even during extended high-power sessions

Precision-Optimized Tuning & Performance Achieve tight, accurate bass with Thiele/Small specs like a 0.78 Qts, 22.5mm Xmax, and 38Hz Fs. Ideal for sealed or ported enclosures (2.5 4 ft3), this sub hits subsonic lows as deep as 25Hz perfect for sound quality and SPL lovers alike

Built Tough with Premium Carbon Fiber Components Lightweight yet ultra-rigid carbon fiber cone and dust cap provide strength without distortion. Coupled with an aluminum black basket, high-strength foam surround, and 4-gauge push terminals, this sub is designed for aggressive builds and clean installs

Enclosure-Ready with Versatile Mounting Dimensions At 15.5 total diameter and just 10.9 mounting depth, this sub fits most standard 15" enclosures. Whether youre building a sealed or ported box, the included port dimensions (Fb: 32Hz) and enclosure volume recommendations make system design simple

Nominal Diameter

15" / 381mm

Nominal Impedance

1+1 Ohm

RMS Power Handling

3500W

MAX Power Handling

7000W

Sensitivity (1w/1m)

84dB

Frequency Response

10-200Hz

Recommended Low-Pass Crossover

60Hz

Improved Heat Dissipation

Yes

Cone Shape

Conic

Speaker Terminals

Push Terminals 4ga

Voice Coil Diameter

3.5" / 89mm

Voice Coil Former Material

Aluminum

Winding Material

CCAR

Cone Material

Carbon Fiber

Dust Cap Material

Carbon Fiber

Dust Cap Size

7" / 180mm

Surround Material

Foam

Spider Diameter

9" / 228mm

Leads Connection Type

Spider Crossed

Basket Material

Aluminum

Basket Color/Finish

Aluminum/Black

Magnet Material

Ferrite

Magnet Weight

425 Oz

Equivalent Volume

Vas 27.22L / 0.961ft3

Excursion (one way)

Xmax 22.5mm

Free Air Resonance

Fs 37Hz

Mechanical Factor

Qms 4.72

Electrical Factor

Qes .93

Total Factor

Qts 0.78

Moving Mass

Mms 571.9g

Compliance

Cms 31.57mm/N

BL Factor

BL 23.96

Voice Coil Inductance

Le 1.85mH

Diaphragm Area

Sd 779.3cm2

DC Resistance

Re 2+2 Ohms

Efficiency Bandwidth Product

EBP 39.7

Sealed Internal Volume

70L / 2.5ft3

Sealed Box Output Response

F3 35Hz

Ported Internal Volume

113.2L / 4ft3

Port Size *Square (WxHxLong)

3"x15"x22.4"

Port Tunning Frequency

Fb 32Hz

Ported Box Output Response

F3 27Hz

Overall Diameter

15.5" / 394mm

Overall Depth

12.75" / 324mm

Front Mount Baffle Cutout

14.15" / 360mm

Mounting Depth

10.9" / 277mm

Motor Diameter

9" / 230mm