DD Audio 18" Subwoofer Dual-1-Ohm 12800 Watts Peak DD-SB-9918C-D1 — Big Jeff Audio Dealer Platform
Skip to content
Welcome To The Dealer Platform
Welcome To The Dealer Platform


  • Exceptional Performance: The DD Audio 9918C D1 Subwoofer combines cutting-edge technologies with immense power, boasting a peak power handling of 12,800 watts and a robust 3200 watts RMS, ensuring exceptional bass performance for your audio system.
  • Advanced Engineering: Featuring an aluminum Dual Stage rear-mounted Heatsink, USA-made Iron Cloth Spider System, 2nd generation V-ROM surround, and more, this subwoofer is engineered to redefine performance standards, delivering powerful and precise bass reproduction.
  • Supercharged Motor Design: The 9900 motor throws nearly 9000 gauss through a 30mm deep gap, driving the 8-layer coil to 40mm of one-way travel with exceptional coil control and excursion, resulting in outstanding bass response and clarity.
  • Durable Construction: Built to last, the subwoofer features non-pressed carbon fiber loaded pulp cones, laminated tinsel leads, a hand-laid composite dust cap, and an embossed DDesign magnet boot, ensuring durability and reliability even under extreme conditions.
  • Made in the USA: Handmade in the USA with meticulous attention to detail, this subwoofer boasts the audibly distinguishable quality of American craftsmanship, making it a premium choice for audiophiles and car audio enthusiasts.

DD   Audio 18" Subwoofer Dual-1-Ohm 12800 Watts Peak DD-SB-9918C-D1

This Listing Includes:

  • (1) DD Audio SB-9918C-D1 Subwoofer.

The 9900C combines the performance redefining technologies such as the aluminum Dual Stage rear mounted Heatsink, USA Made Iron Cloth Spider System, 2nd generation V-ROM surround, and more with the immense power of DD's largest ferrite motor subwoofer series, optimized for a 3200-watt rms and the ability to handle power bursts well over 12,000 watts.


  • 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

  • Optional Upgrade: SuperCharge

Technical Specifications:

  • Speaker Size (In): 18

  • Watts RMS: 3200

  • Watts Peak: 12800

  • Impedance: D1

  • VCD (In): 4

  • Piston Diameter (In): 15.5

  • Fs (Hz): 26.24

  • Qms: 2.265

  • Qes: 0.5167

  • Qts: 0.4705

  • Vas (Liters): 161.9

  • Xmech (MM): 60

  • Xmax (MM): 22

  • Frame OD (In): 18.25

  • Frame OD w/Gasket (In): 18.5

  • Mounting Diameter (In): 16.75

  • Mounting Depth (In): 11.875

  • Motor Diameter (In): 10.3125

  • Motor Depth (In): 4.5625

  • Woofer Displacement (CuFt): 0.46

  • Ported Enclosure (CuFt): 5.0 - 6.0

  • Shipping Weight (Lbs): 89

Payment Information


We accept PayPal for all ebay orders. You can use your credit through PayPal as all major credit card are accepted by PayPal.

We accept PayPal for all international orders, your address must be verified with PayPal.

We are not responsible for any custom duties or brokerage fees that may apply for all international orders.

When you click on the Buy it Now button you are entering into a
contract whereby you agree to purchasing the item at the price listed.

If you want to ship your item to an alternate address please add
that address on your PayPal account and use the address as the default
or confirmed address to pay us through PayPal

With Free Same Business Day Shipping we work to get you your order Fast. 


All orders over $500 will require a signature for delivery.

All pre-selected shipping rates and methods are for customers with a
valid residential or commercial address within the Contiguous 48 United
States (PO Boxes address may require additional charges).

P.O. Boxes, APO/FPO addresses, Alaska, Hawaii, Puerto Rico, Guam,
U.S. Virgin Islands, Northern Mariana Islands, American Samoa, Canada,
and other countries may require additional shipping fees. Please contact
a member of our team for detailed shipping charges.

Shipping is available only to PayPal verified addresses. When making
payment please confirm your address has been verified with PayPal. Once
payment is made shipping address can not be changed/altered. Payments
made using an unverified PayPal address will be refunded and order will
be canceled.

We will not accept request to change shipping address once payment
has been made. Please confirm your shipping address is up-to-date and

Typical handling time for orders is 1-business day. We do our best
to ship every package with-in 1 business day of receiving a cleared
payment. In some circumstances additional time may be need, in which
case we will contact buyer.

Shipped orders that are returned by the shipping company due to an
insufficient address or an undeliverable address will be refunded less a
20% restocking fee.

If package is refused or marked undeliverable and returned
back to us by the carrier, you will need to pay the shipping cost in
full to have the package sent back to you or we can refund the money
minus the cost of shipping


If you have not received your package, but the tracking information shows that it was delivered,
please do the following within 36 hours of expected, stated delivery:


Verify the shipping address on the order is the address where you are looking for the package

Look for a notice of attempted delivery

Look around the delivery location for the package, or see if a neighbor has accepted the delivery

Be sure to double check your mailbox and other usual spots for package delivery


If you think that your package has been stolen, we will require a police report since this is now theft.
Once we have a police report on file for the stolen package, we will reship your order.