DD Audio 18" USA Built Dual 1-Ohm 4” Voice Coil 3200-Watt RMS Subwoofer 9918C 

• High Power Handling: 3200W RMS and 9600W peak for competition-level performance.
• Dual 1-Ohm Configuration: Designed for powerful, efficient amplifier setups.
• Innovative Cooling Technology: Aluminum Dual Stage Heatsink and Free Flow Cooling System ensure optimal heat dissipation.
• Superior Build Quality: Handcrafted non-pressed carbon fiber-loaded pulp cone for strength and sound clarity.
• Advanced Surround Design: 2nd Gen V-ROM surround enables extended cone movement and deep bass.
• Handcrafted in the USA: With premium materials for a high-end, audibly distinguishable listening experience.

DD Audio 18" USA Built Dual 1-Ohm 4†Voice Coil 3200-Watt RMS Subwoofer 9918C

This Listing Includes:

• (1) DD Audio 18" 1-Ohm, 3200 RMS/9600 Peak USA Built Subwoofer

The DD Audio 9900C Series 18-inch subwoofer takes bass performance to the next level, blending advanced engineering with premium materials for exceptional sound quality. Designed for competition and high-performance car audio systems, it delivers 3200W RMS and handles bursts exceeding 9600W with ease. Featuring the aluminum Dual Stage Motor Heatsink, USA-made Iron Cloth Spider System, and the innovative 2nd Gen V-ROM surround, this subwoofer ensures superior cooling, durability, and extended excursion. Its supercharged motor generates nearly 9000 gauss, driving an 8-layer coil to achieve unmatched control and precision. The non-pressed carbon fiber-loaded pulp cone is lightweight, strong, and handcrafted in the USA for an audibly superior listening experience. Perfect for large ported enclosures, the 9900C delivers uncompromising bass power and accuracy.

Features

• NEW Aluminum 2 Stage Motor Heatsink


• 260mm Magnet Diameter


• Multi-Vent Free Flow Cooling Motor


• Shorting Ring Motor


• 4.3†High-Temp Voice Coil


• Excursion Optimized ESP Frame


• V-ROM Vario-Density Surround


• Non-Pressed Composite Reinforced Pulp Cone


• 11†Dual/Triple Layer Iron Cloth Spider


• Laminated Tinsel Leads


• Hand Laid Composite Dust Cap


• Embossed DDesign Magnet Boot


• Made In USA

Specifications

• Speaker Size: 18 inches


• Watts RMS: 3200


• Watts Peak: 9600


• Impedance: Dual 1-ohm


• Voice Coil Diameter (VCD): 4 inches


• Piston Diameter: 15.5 inches


• Resonant Frequency (Fs): 26.24 Hz


• Qms: 2.265


• Qes: 0.5167


• Qts: 0.4705


• Vas: 161.9 liters


• Xmech (Max Excursion): 60 mm


• Xmax (Linear Excursion): 22 mm


• Frame Outer Diameter (OD): 18.25 inches


• Frame OD with Gasket: 18.5 inches


• Mounting Diameter: 16.75 inches


• Mounting Depth: 11.875 inches


• Motor Diameter: 10.3125 inches


• Motor Depth: 4.5625 inches


• Woofer Displacement: 0.46 cu. ft.


• Recommended Ported Enclosure: 5.0–6.0 cu. ft.


• Shipping Weight: 89 lbs

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.
• Log into your account on our website and use the “Check Your Order Status” button.
• If the issue persists, please refer to our detailed guide on tracking your order or contact our customer service team for further assistance.