DD Audio - True To The Source
Known colloquially as Digital Designs, DD Audio is a company that prefers not to over-complicate things. Put succinctly it's most happy pursuing it's goal of creating the finest audio products possible, dedicating itself to enhancing the performance of its already highly esteemed products no matter the lengths required. Established way back in 1986, DD Audio has designed and manufactured products for every facet of the audio industry. Whether it be mobile, marine, home, professional, industrial or OEM applications; you bring your problem and DD Audio will supply the solution.

A company that prides itself on being a genuine American design and manufacturing company, DD Audio continues to hand build the best subwoofers in the world at its Oklahoma City headquarters in the USA. No expense is spared when it creates its stellar products, with it employing only the highest quality components available to ensure maximum product performance and longevity.

9900 Series - Power Unlike Anything You've Ever Felt Before
When it comes to the realm of sound pressure competition many brands talk the talk. However when it's time to put one's money where their mouth is; the 9900 series subwoofers are designed to take on said competition and utterly decimate it. Featuring an near on indestructible design that utilises the latest in metallurgical and material enhancements; the 9900 series components will return you not only volume in abundance but also downright scary amounts of kinetic force. The 9900 series are a brutal beast, easily able to deliver a performance many rivals struggle to even comprehend.

Design Ideologies
Originally coined The Beast; the 9900 series first appeared on the market in the early 2000s. It took a brief hiatus, but now they’re back and even more beastly than ever! The latest iteration was developed in response to the recent explosion in ultra-low-frequency music. These high excursion subwoofers were designed to provide long-term power handling with tremendous accuracy. They’ve been optimized for a 1500 Watt to 2500 Watt power band with the ability able to handle bursts of up to 10000 Watts! One look at the 9900 motor and you see why it’s been saddled with the moniker the beast. It boasts three inches of magnet cross-section, over a ten inch outside diameter, it weighs in at seventy pounds and that’s just the motor. The traditionally tight DD Audio magnet gap drives a 4″ flat wound aluminum voice coil to a peak excursion in excess of three inches while keeping enough turns in the gap to maintain power and control.

The 9900 series are the go to subwoofers for the demanding bassaholic with a profound interest in physics. Entertaining minds will revel in the endless system design possibilities deliverable with these precision low-frequency devices.

Relentless Scrutiny
In order to take the 9900 Series to a higher state DD Audio had to move beyond the point whereby refinements were mere upgrades. This mindset was conducive to DD Audio engineers completely redeveloping some facets of the design. Let’s look a little closer at some of them.

The Heatsink
The dual stage heat sink uses an internal aluminum tube insert to transfer heat away from the pole piece and voice coil and into the vented back plate. This process of conduction and convection lowers the working temperature to safer levels for the longest playing time possible at the highest level of efficiency possible.

The Surround
The extremely robust surround is returns the smoothest high excursion capability to date. The new design offers added height for DD Audio’s proven EROM surrounds and with it higher levels of excursion over maximum cone area. DD Audio engineered variable density ribs to expand and contract as the surround is forced in and out of sine waves, essentially eliminating hysteresis and its negative effect on linearity; thus ensuring the highest possible stability.

The Spider
Complementing the improved surround is DD Audio’s new USA made iron cloth spider system. These high roll spiders are capable of 30% more excursion. The new iron cloth spider system continues the tradition of multilayer pressing to meet the power tuned stiffness targets, but with the added benefits of higher strength threads weaving through the double or triple layer configurations. The result is substantially elevated performance and long term durability.

The Coil
The 9900 series voice coils are made in the USA and have evolved since the previous generation to be the envy of DD Audio’s competitors. Among the multiple layers in these complex formers are Nomex and Polyamide which insulate the coil, protecting the glue joints between the spider and coil former. These synthetic layers are sandwiched by dual aluminum layers, which transfer heat away from the voice coil windings and acting as a heat sink. The wire and adhesives are manufactured to endure the most extreme high temperatures and the coil thermosetting occurs over twin baking and resin coating cycles. The double slit design helps to reduce distortion and inductance. In short this voice coil has matured to include the best known materials and techniques available to deliver matchless performance.

The Motor
The 9900 motor is astounding to behold. DD Audio uses its own proprietary magnet tooling to maximize the surface area transfer from the low carbon back and top plates. The motor on the 9900 series feature the tightest gaps in the industry, with minimal tolerances around the coil windings for increased gap flux. The motor also features DD Audio’s free flow cooling system. This system employs vents and cross vents running through the magnet gap, pole piece, top plates and back plates. The more excursion the speaker sees, the higher the airflow through the motor and around the coil. All motors use faraday shorting rings to reduce distortion and inductance.

The Cone
The 9900 series are made in the USA with as many indigenous components as can be reasonably acquired. Among those components is the USA made cone, engineered to be the lightest and stiffest pulp cone in existence. The key ingredient to its incredible strength to weight ratio is carbon fibre. Augmented by Kevlar and a myriad of synthetic and natural fibers, the cone is low density formed on non-press molds to increase the total cross section area, promoting a web of strengthening ribs across its backside. This high cross section area doubles the rigidity without increasing mass. The exotic fibers cost more and the cones take longer to form, but the result is audibly distinguishable; to hear the difference of the 9900 is to hear the difference of handmade USA build quality.

Design Features
The rich heritage of this astute company, together with its ever-increasing technical acumen; is conducive to these components featuring a vast array of impressive design ideologies and latest technological advancements.
– Aluminum twin stage motor heatsink.
– 254 mm diameter magnet.
– Multi vent free flow cooling motor.
– Shorting ring incorporated.
– 4″ high temperature voice coil.
– Excursion optimized ESP frame.
– VROM vario-density surround.
– Non-pressed composite reinforced pulp cone.
– 11″ dual / triple layer iron cloth spider.
– Enormous multiple layer composite spider.
– Laminated tinsel leads.
– Hand laid composite dust cap.
– Embossed protective magnet boot.
– Made in the USA.
– Optional upgrades available.

Electrical Specifications
– Nominal configuration: dual 2 Ohm 12″ subwoofer
– Continuous power handling: 2500 Watts
– Maximum power handling: 10000 Watts
– Voice coil diameter: 101.6 mm
– Frequency response: 20 Hz – 500 Hz
– Sensitivity: 83.5 dB
– DC resistance (Re): 1.9 Ohms
– Resonant frequency (Fs): 31.63 Hz
– Xmax: +/- 22 mm
– Compliance (Vas): 23.63 l
– Total Q (Qts): 0.352
– Mechanical Q (Qms): 5.398
– Electrical Q (Qes): 0.377

Physical Specifications
– Mounting diameter: 309.6 mm
– Mounting depth: 246.1 mm
– Weight: 31.8 kg

Important Disclaimers
Given the dynamic nature of electronics industries these days; below are listed some very important specifics you need to be aware of.

Brand Authorization And Stock Sourcing
We are a fully authorised Australian dealer of this brand and all stock is sourced through legitimate channels. It therefore enjoys full Australian warranty, backing and support.

Pricing Structure
Whilst we endeavor to offer the best price possible, we ask that if you do find a better price elsewhere from an authorised dealer; please contact us. Also be aware that we regularly conduct group buys and sales, therefore pricing can sometimes be subject to change without notice.

Stock Structure
Being a dynamic store is conducive to our inventory constantly changing. We list only a small portion of our stable online, usually products most popular. Aside from these we also stock numerous other variants and configurations of these products, hence if you don’t see what you’re after please contact us.

Shipping
All our products are shipped with registered and insured postage. Upon ordering you’ll be issued with a receipt, a consignment note via which you can track your order, and we’ll also SMS you photos of the package for identification purposes.

Technical support
This last one we cannot emphasise enough! Please contact us if you require any further information or assistance with the setup and use of this product, especially pertaining to aspects more technical. As we want you to get the very best from this product.