18" 3000 Watt RMS Dual 1 Ohm Car Audio Subwoofer Sundown Audio X-Series XV4

• Extreme power handling rated at 3,000 watts RMS with 6,000 watts peak for massive bass output
• Huge 18 inch cone area combined with 30mm Xmax delivers deep, authoritative low frequencies
• Advanced Xv4 coil technology and heavy duty motor provide excellent thermal stability and durability
• Optimized for large ported enclosures with a recommended 7.0 cu ft box tuned to 32 Hz
• Built for aggressive daily systems and competition builds with proven Sundown Audio X-Series performance

18" 3000 Watt RMS Dual 1 Ohm Car Audio Subwoofer Sundown Audio X-Series XV4

This Listing Includes:

• (1) X-Series XV4 18" Dual 1 Ohm Subwoofer

The Sundown Audio X-Series XV4 18" subwoofer is built for extreme low frequency output with the control and durability serious bass systems require. Rated at 3,000 watts RMS and engineered with advanced Xv4 coil technology, this subwoofer delivers massive output while maintaining stability and clean sound under heavy load.

With a huge cone area and 30mm of linear Xmax, the XV4 18" is designed to move serious air and produce deep, authoritative bass. The heavy duty motor structure and optimized cooling design help maintain consistent performance during extended high power use. Designed primarily for large ported enclosures, the XV4 18" is ideal for aggressive daily systems and competition builds where maximum air displacement and reliability matter most.

Specifications:

• Subwoofer Size: 18 inch


• Series: X-Series XV4


• Voice Coil Configuration: Dual 1 Ohm


• RMS Power Handling: 3000 Watts


• Peak Power Handling: 6000 Watts


• Xmax: 30 mm


• Sensitivity: 86 dB


• Cone Area (Sd): 113.41 in


• Motor Diameter: 9.25 inches


• Displacement: 0.28 cu ft

T/S Parameters (D1 Only):

• Re: 2.05 Ohms


• Fs: 25.87 Hz


• Vas: 93.67 L


• Qes: 0.63


• Qms: 4.13


• Qts: 0.54


• BL: 19.74 NA


• Mms: 737.81 g


• Cms: 51.28 uM/N

Enclosure Recommendations:

• Sealed Enclosure: Not Recommended


• Ported Enclosure Volume: 7.0 cu ft


• Recommended Port Tuning: 32 Hz


• Recommended Port Area: 112 sq in

4th Order Enclosure Specs:

• Sealed Side Volume: 3.0 cu ft


• Ported Side Volume: 9.0 cu ft


• Port Area: 180 sq in


• Port Length: 8 inches

Dimensions:

• Mounting Depth: 15 inches


• Outside Diameter: 18.42 inches


• Cutout Diameter: 16.69 inches


• Motor Diameter: 9.25 inches

Accepted Payment Methods at Big Jeff Audio

At Big Jeff Audio, we strive to make your shopping experience as smooth as possible by offering a wide variety of payment options. Below is a complete list of the payment methods we accept:

Credit and Debit Cards

• Visa
• Mastercard
• American Express
• Discover
• Diners Club

Digital Wallets

• Amazon Pay
• Apple Pay
• Meta Pay (formerly Facebook Pay)
• Google Pay
• Shop Pay
• PayPal

International Payment Methods

• Bancontact
• iDEAL

Bank Transfers

• Zelle

Financing Options

We also offer financing options to make purchasing easier. Learn more about our financing options here.

• Klarna
• Affirm
• Sezzle
• Snap
• Acima
• Tiptop

If you have any questions or need assistance with payments, feel free to reach out to us at info@bigjeffaudio.com or call us at 737-BIG-JEFF.

Shipping Options and Delivery Time

Do You Offer Expedited Shipping?

Yes! At checkout, you can select from different shipping options:

• Standard Shipping: Free for orders over $100.
• Expedited Shipping: Available at an additional cost, calculated based on the weight and destination of your order.

How Long Does Delivery Take?

• Handling Time: Most orders are processed and shipped within 1 business day after receiving cleared payment. Occasionally, additional handling time may be required, but we’ll notify you if that’s the case.
• Standard Shipping: Typically takes 3-5 business days, though delivery may be affected by extreme weather or holidays.

What Happens If My Package Is Undeliverable?

If your package is refused or marked undeliverable and returned to us by the carrier, you’ll need to pay the full shipping cost to have the package resent. Alternatively, we can refund your order, minus the cost of shipping.

Why Can’t I Track My Order?

If you're having trouble tracking your order:

• Make sure you’ve received the shipping confirmation email with the tracking number.
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• If the issue persists, please refer to our detailed guide on tracking your order or contact our customer service team for further assistance.