DD Audio 15" USA Built Dual 2-Ohm 4” Voice Coil 3200-Watt RMS Subwoofer 9915C 

• Immense Power Handling: 3200W RMS and peaks up to 9600W for high-performance bass.
• Innovative Cooling: Free Flow Cooling and Dual Stage Heat Sink ensure excellent heat dissipation.
• Superior Materials: Handcrafted carbon fiber-loaded pulp cone for lightweight strength and sound precision.
• Advanced Surround Design: 2nd Gen V-ROM surround allows for maximum cone movement and deeper bass.
• Exceptional Magnetic Force: Supercharged motor generates 9000 gauss for coil stability and performance.
• Dual 2-Ohm Configuration: Provides compatibility with a range of amplifier setups.

DD Audio 15" USA Built Dual 2-Ohm 4†Voice Coil 3200-Watt RMS Subwoofer 9915C

This Listing Includes:

• (1) DD Audio 15" 2-Ohm, 3200 RMS/9600 Peak USA Built Subwoofer

The DD Audio 9900C Series 15-inch subwoofer offers state-of-the-art engineering for unmatched bass performance. Designed for audiophiles and car audio competitors, this subwoofer combines DD’s largest ferrite motor with advanced technologies, including the aluminum Dual Stage Heat Sink, USA-made Iron Cloth Spider System, and 2nd Gen V-ROM surround. With 3200W RMS and bursts exceeding 9600W, the 9900C provides incredible power and precision. The supercharged motor generates nearly 9000 gauss through a 30mm gap, propelling an 8-layer coil for up to 40mm of one-way travel. Its handcrafted, carbon fiber-loaded pulp cone ensures exceptional durability and sound clarity, while the Free Flow Cooling System protects the voice coil from overheating. Engineered to dominate in competition setups, this subwoofer is optimized for large ported enclosures.

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


• 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: 15 inches


• Watts RMS: 3200


• Watts Peak: 9600


• Impedance: Dual 2-ohm


• Voice Coil Diameter (VCD): 4 inches


• Piston Diameter: 14.25 inches


• Resonant Frequency (Fs): 34.32 Hz


• Qms: 6.551


• Qes: 0.426


• Qts: 0.400


• Vas: 54.38 liters


• Xmech (Max Excursion): 62 mm


• Xmax (Linear Excursion): 22 mm


• Frame Outer Diameter (OD): 16.62 inches


• Frame OD with Gasket: 16.75 inches


• Mounting Diameter: 15.19 inches


• Mounting Depth: 10.31 inches


• Motor Diameter: 10.31 inches


• Motor Depth: 4.56 inches


• Woofer Displacement: 0.4 cu. ft.


• Recommended Ported Enclosure: 3.0–6.0 cu. ft.


• Shipping Weight: 87 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.