Simply AmaZing

Z3 Subwoofer


In early 2005 the first-ever iteration of the Z motor was launched. It forever changed the way people thought of a high-performance subwoofer and pushed the limits of car audio to new extremes. Over the years, many versions of Zs have been produced and this spirit of experimentation has driven us to constantly improve and innovate.

This sub rightfully takes its place as one of the most dominant competition subs of all time even though it wasn’t actually designed for competition. The motivation behind the Z was simply to build the best sounding high power handling driver of all time; to that note DD Audio considers the Z mission accomplished.


The USA steel and aluminum motor parts are machined and finished in our hometown of OKC, and all the moving parts are USA made from the finest materials and manufacturing methods available. These parts are then assembled and QC’ed in our OKC facility.

The current generation Z3 is a 13 lens grade 52 neodymium open motor design. The motors are adorned with CNC engraved Z artwork, and every motor is engraved with its unique production number. All steel motor parts feature a Zinc and Black Chromate plating that gives each Z motor a unique look with the surface color ranging from matte to different iridescent hues. This plating provides excellent corrosion and heat resistance while minimizing coating thickness and maximizing energy transfer between motor parts. To further compliment the Z’s striking motor cosmetics the aluminum quick-change top plate, and shorting rings both feature red anodized accents.

You’ll notice the standard TS parameters are missing for the Z subs. This omission is on purpose because each Z is custom built to order allowing for Zillions of possible parameter sets making one static set of specs very prone to inaccuracy. The reason we build Zs custom to order is it gives a system designer the utmost freedom to design for their specific application.

The Z Series subs also feature our Evolution Subwoofer Package (ESP). ESP equipped drivers sport larger diameter suspensions and deeper frames than standard subs and exclusive surround and cone designs. ESP subs are truly built to maximize performance in their designated size class.

The Z Series comes standard with an oversized dry finish black composite dust cap, red logo, and treated pulp cone, but it can be optioned out with custom suspension configurations, alternative composite dust caps, composite cones, powder-coated frames, and a multitude of logo options to give your sub a personalized look and/or added performance for a specific application.


DD Audio will continue down the path of global transducer domination via the sledgehammer of the subwoofer world….THE Z


Learn more about the ESP features at The DDownlow.


Model Z310 (ESP) Z312 (ESP) Z315 (ESP) Z318 (ESP) Z321
Driver Size 10" 12" 15" 18" 21"
Watts RMS 1000 - 4000 1000 - 4000 1000 - 4000 1000 - 4000 1000 - 4000
Peak Power 8000 8000 8000 8000 8000
VCD 3.35 3.35 3.35 3.35 3.35
Impedance D0.5 / D1 / D1.5 / D2 D0.5 / D1 / D1.5 / D2 D0.5 / D1 / D1.5 / D2 D0.5 / D1 / D1.5 / D2 D0.5 / D1 / D1.5 / D2
Piston Dia - in 9 1/4 10 14 1/4 15 1/2 18 1/4
Frame OD - in 11 7/16 13 3/8 16 5/8 18 1/4 21 5/16
Frame OD w/Gasket - in 11 9/16 13 1/2 16 3/4 18 7/16 21 5/16
Mounting Diameter - in 10 3/16 12 3/16 15 3/16 16 5/8 19 1/4
Mounting Depth - in 10 5/8 11 1/2 12 1/8 12 9/16 13 1/8
Motor Diameter - in 9 9 9 9 9
Motor Depth - in 5 5/8 5 5/8 5 5/8 5 5/8 5 5/8
Woofer Displacement - cu ft 0.19 0.27 0.36 0.48 0.52
Sealed Enclosure - cu ft N/A N/A N/A N/A N/A
Ported Enclosure - cu ft 1.25 - 1.5 1.75 - 2.75 3.0 - 6.0 5.0 - 6.0 6.0 - 8.0
Shipping Weight - lbs 69 70 72 73 76

Any DD Audio Product bearing the Marine Grade logo incorporates water resistant features enabling it to be used in applications where moderate exposure to moisture will not result in damage to the product. 

Marine Grade products are not waterproof, and submersion or excessive moisture exposure may result in product failure. DD Audio Marine Grade products are not certified for saltwater environments.

Express yourself with your choice of logo style and color plus custom dust cap and cone

Start Customizing
V-ROM Surround
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V-ROM (Vario-Density Extended Range of Motion)

DD Super Frame (SFrame)
True Size Carbon Fiber Blend Cone (CFB)
Non-pressed paper cones
High-temp, aluminum former voice coils
shorting ring
Aluminum Shorting Ring
Direct Connect
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We developed the most electrically efficient connections, the Direct Connect, one of the latest DD innovations now being copied the world over. First off, our multiple tinsel leads are twisted and soldered to copper power wire at the edge of the speaker frame. This twisted and soldered connection reduces any signal lost to an absolute minimum.

Our 10 gauge power cable is made from Oxygen-Free copper. Copper provides perfect contact in contrast to speaker terminals or push-down spring connections which are made from low grade metal. Many of these “pretty” (but poorly made) terminals have 0.1-0.2 Ohms of resistance in just the terminal housing. If you don’t believe us, unscrew one and watch it stick to the speaker magnet.

Another flaw of common speaker terminals is the inability to match up with large gauge speaker wire…And if one is able to find a terminal large enough to accept large gauge wire, it is still made from cheap metal thus the signal loss problem. Our 10 gauge power wire Direct Connects can be twisted (the best mechanical connection possible) with any gauge wire, AND also be connected with ANY number of wires. Series and parallel connections can be done in any combination and WITHOUT signal loss.

DD suggests the use of wire nuts for direct wire to wire terminations. Twisted wire connections are the only code approved termination in building codes due to the no loss transfer ability and permanently held connection. These same wire nut terminals are the perfect connection for mobile audio connections.

Direct Connect allows virtually any gauge and number of speaker wires to be connected without signal loss.

Laminated Leads
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Another DD innovation was eliminating lead wire noise, breakage and suspension offset distortions with the introduction of our Laminated Lead Wire System. We pioneered this development as increased speaker excursion exceeded the limits that stretched tinsel jumping across the frame to cone gap could accommodate. The longer lead lengths cause excessive slapping against the cone as well as setting up oscillation modes that fatigued the wire.

The Laminated Lead Wire System placed the tinsel leads between layers of the spiders, eliminating hanging wires to clang around between the spider and cone. The spiders and lead wires become an integral unit with the corrugations of the spiders engineered for the excursion demand of the speaker.

Traditional hanging lead wires place weight and tension on one side of the cone, causing harmonic distortion. The DD system places the wires across the entire spider thereby balancing the weight and tension on each side of the speaker.

The DD system also allows for efficient handling of high current demand applications. Some DD woofers use 8 lead wires for every voice coil conductor, allowing even the most high power amplifiers to transfer power with minimal signal loss.

Laminated Spiders
Double Slit aluminum voice coil former
Aluminum - Double Slit Voice Coil Former
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The aluminum former material acts as a heat sink, lowering the voice coil temperature. The double slits in the former break up and reduce magnetic eddy currents generated by the moving coil. The coil design works in conjunction with the copper capped pole piece to further reduce heat, inductance, and harmonic distortions.

DD Spiders
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The DD multi-spider suspensions start with layers of fine weave cloth impregnated with thermal activated resin.  These fine cloth sheets are then placed together with the weave grain at opposite angles, equalizing the inherent tension and increasing the strength. The layers are formed by heat and pressure until cured in molds with very high peaks and valleys. The two layers of fine cloth are far stronger than a single layer of heavier cloth, the higher surface area of the fine weave cloth gives more contact area for the resin. The high peaks and valleys, or corrugations, dramatically increase the strength over wide, shallow, progressive type rolls.

Two layers of laminated cloth are also more resistant to bending than a single layer. The layers are forced to bend along different section of their respective weaves, making the combined structure stronger and more resistant to fatigue.

We then take these laminated layers and combine them for a given compliance target, most DD speakers will have 4 – 6 layers of cloth in the suspension.

These multiple layers of cloth formed in deep corrugations keep their inherent strength once the resin breaks down. The DD suspension retains restoring force to the cone after years and years of use. It does cost more to build mult-layered suspensions, but the benefits are many and long lasting.

Triple layer Laminated Spiders
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