Sundown Audio X-Series v.3 Subwoofer

The manufacturer recommends a ported enclosure volume of 7.00 cubic feet. While this is the standard recommendation for optimal performance, the subwoofer can also be used in larger enclosures if you are looking for even greater low-end extension.

The X-18 v.3 is rated for 2,500 watts RMS, so you will need a high-output monoblock amplifier capable of delivering that power cleanly. Ensure your electrical system, including your alternator and battery bank, is upgraded to support this level of power draw.

The D1 model features dual 1-ohm voice coils, while the D2 features dual 2-ohm coils. Choosing between them depends on how you plan to wire your amplifier to achieve your desired final impedance load.

You will need a mounting depth of 10.25 inches and a cut-out diameter of 16.69 inches. Given the 18.42-inch outside diameter, ensure your enclosure baffle is large enough to accommodate the frame securely.

The v.3 series features a larger motor structure, improved ventilation, and the updated Mega-Roll v.2 surround. These upgrades collectively enhance the subwoofer's linearity, durability, and overall excursion capabilities.

While the X-18 v.3 is engineered for extreme bass and high power handling, it is designed with a focus on low distortion and suspension linearity. This makes it a capable choice for daily listeners who want high-output, deep bass performance in a ported setup.