• 1250W RMS / 2500W Peak Power Handling for extreme output in compact builds
• Dual 4-Ohm voice coils for flexible wiring configurations
• Triple-stacked motor with aluminum shorting ring for reduced distortion
• FEA-optimized suspension with ~19mm linear Xmax
• Designed for sealed, ported, and 4th order enclosures

Sundown Audio X Series V.4 8" 1250W RMS Dual 4-Ohm Subwoofer (X-8 V.4 D4)

This listing includes:

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

The Sundown Audio X-8 V.4 D4 is the king of standard cutout 8-inch subwoofers, setting the benchmark for extreme output, control, and durability in compact high-power bass systems. Rated at 1250 watts RMS and 2500 watts peak, this subwoofer is engineered for serious performance where space is limited but output demands are not.

Building on the legacy of the X-8 v1, v2, and v3, the V.4 introduces a meticulously FEA-optimized spider and surround system, dramatically improving linearity, control, and usable excursion. The result is a subwoofer capable of approximately 19mm of linear one-way Xmax and over 2.4 inches peak-to-peak before the voice coil exits the gap.

At its core is a massive triple-stacked motor assembly, a 2.5-inch high-temperature voice coil, and a hyper-extended pole design that maximizes magnetic efficiency and power handling. An integrated aluminum magnet ID shorting ring reduces inductive distortion for cleaner, tighter bass at extreme output levels.

Designed for sealed, ported, and 4th order enclosures, the X-8 V.4 D4 delivers unmatched performance in its class and is ideal for high-end SPL builds and aggressive daily systems alike.

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

• RMS Power Handling: 1250W


• Peak Power Handling: 2500W


• Nominal Impedance: Dual 4 Ohm


• DC Resistance (Re): 6.0 Ohm


• Voice Coil Diameter: 2.5"


• Sensitivity (1W/1m): 79.8 dB


• Xmax (One-Way): 19mm

Thiele & Small Parameters

• Fs: 44.150 Hz


• Vas: 3.562 L


• Qes: 0.497


• Qms: 2.30


• Qts: 0.409


• BL: 27.141 NA


• Mms: 220.09 g


• Cms: 59.044 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