Sundown Audio M 18" D2 Subwoofer | 2000W RMS | 4000W Peak

Sundown Audio M 18" D2 Subwoofer | 2000W RMS | 4000W Peak

Unleash earth-shaking bass with the Sundown Audio M 18" D2 Subwoofer, built for high-performance systems demanding extreme output and durability. With a 2000W RMS and 4000W peak power rating, this 18-inch monster is designed to handle serious power while delivering clean, accurate low-frequency response.

Available in both Dual 1 Ohm and Dual 2 Ohm configurations, the M Series allows flexible wiring options for a wide range of amplifier setups.

Engineered for Massive Output

Featuring a quad stack magnet structure, Mega Roll surround, and a custom high-strength frame, the M 18" subwoofer delivers long excursion and tight control, making it ideal for SPL and high-output daily systems. Its etched all-black backplate not only boosts heat dissipation but gives it an aggressive, stealthy aesthetic.

T/S Parameters M18D2

• RE (Ohms): 4.125

• Fs (Hz): 25.749

• VAS (L): 117.53

• Qes: 0.74

• Qms: 5.379

• Qts: 0.65

• Le (mH): 3.55

• BL (NA): 24.026

• Mms (Grams): 638.994

• Cms (uM/N): 59.58

• Sensitivity (dB @ 1w/1m): 86.102

• Xmax: 35mm

Enclosure Recommendations

• Sealed Enclosure: Not Recommended

• Ported Enclosure Volume: 7.0 cu ft

• Tuning Frequency: 32 Hz

• Recommended Port Area: 112 sq in

• 4th Order Sealed Side: 3.0 cu ft

• 4th Order Ported Side: 9.0 cu ft

• 4th Order Port Area: 180 sq in

• 4th Order Port Length: 8"

Physical Dimensions

• Mounting Depth: 14.05"

• Outside Diameter: 18.46"

• Cut-Out Diameter: 16.68"

• Displacement: 0.25 cu ft

Whether you’re building a competition-grade system or just want to shake the block, the Sundown Audio M 18" D2 Subwoofer delivers deep, hard-hitting bass and unmatched reliability. Built to perform, built to last — trust Sundown Audio for your next bass upgrade.