• 1250W RMS / 2500W Peak power handling for extreme compact bass systems
• Dual 2-Ohm voice coils for low-impedance, high-output amplifier setups
• Triple-stacked motor with aluminum shorting ring for reduced distortion
• FEA-optimized suspension with ~19mm linear Xmax
• Designed for sealed, ported, and 4th order enclosure applications

Sundown Audio X Series V.4 8" 1250W RMS Dual 2-Ohm Subwoofer (X-8 V.4 D2)

This listing includes:

• (1) Sundown Audio X Series V.4 8" Dual 2-Ohm Subwoofer

The Sundown Audio X-8 V.4 D2 redefines what is possible from a standard cutout 8-inch subwoofer. Designed for extreme output in compact systems, this subwoofer delivers 1250 watts RMS and 2500 watts peak, making it a top-tier choice for high-performance daily drivers and competition-grade SPL builds.

The V.4 generation represents a major leap forward from previous X-8 models, featuring a carefully FEA-optimized spider and surround system that dramatically improves linear excursion, control, and reliability at high power levels. With approximately 19mm of linear one-way Xmax and over 2.4 inches peak-to-peak excursion, the X-8 V.4 D2 delivers deep, controlled bass well beyond what most 8-inch drivers can achieve.

At the heart of the subwoofer is a massive triple-stacked motor assembly, paired with a 2.5-inch high-temperature voice coil and a hyper-extended pole design for maximum motor strength and thermal stability. An integrated aluminum magnet ID shorting ring minimizes inductive distortion, ensuring clean, accurate bass even at extreme output levels.

Compatible with sealed, ported, and 4th order enclosures, the X-8 V.4 D2 is engineered for builders who demand maximum performance from minimal space.

Specifications – X Series V.4 8" Dual 2-Ohm

• RMS Power Handling: 1250W


• Peak Power Handling: 2500W


• Nominal Impedance: Dual 2 Ohm


• DC Resistance (Re): 3.6 Ohm


• Voice Coil Diameter: 2.5"


• Sensitivity (1W/1m): 80.1 dB


• Xmax (One-Way): 19mm

Thiele & Small Parameters

• Fs: 41.299 Hz


• Vas: 4.126 L


• Qes: 0.436


• Qms: 1.941


• Qts: 0.356


• BL: 21.576 NA


• Mms: 215.153 g


• Cms: 68.389 um/N

Enclosure Recommendations

Sealed Enclosure

• Volume: 0.30 – 0.40 cu ft

Ported Enclosure

• Volume: 0.75 – 1.0 cu ft


• Recommended Tuning: 32 Hz


• Recommended Port Area: 12 – 16 sq in

4th Order Enclosure

• Sealed Side: 0.20 cu ft


• Ported Side: 0.80 cu ft


• Port Area: 16 sq in


• Port Length: 8"

Dimensions

• Outside Diameter: 8.71"


• Cutout Diameter: 7.32"


• Mounting Depth: 7.56"


• Motor Diameter: 6.88"


• Driver Displacement: 0.13 cu ft