800 Series

Bass Monster

12 Inch Redline 800 Series Top

800d Series Features:

  • Hi-Roll Foam EROM Surround
  • Kevlar Reinforced Nonpress Pulp Cone
  • 4.0″ BASV 4-Layer Flat Aluminium Voice Coil
  • Quad Layer Deep Bass, High Excursion Spider System
  • Triple Stack High-Grade Ferrite Magnets, 381oz
  • Back Plate Voice Coil Gap Venting
  • Extended Pole Piece with Aluminum Shorting Ring


Model 812d 815d 818d
Driver Size 12" 15" 18"
Watts RMS 1000-2000 1000-3000 1000- 3000
Peak Power 6000 6000 6000
VCD 4" 4" 4"
Impedance D1 / D2 D1 / D2 D1 / D2
Fs - Hz 35 31 29
Qms 4.692 4.723 4.606
Qes 0.53 0.561 0.579
Qts 0.477 0.501 0.514
Vas - liters 24.6 63.1 101
dBSPL 85 87.4 87.9
Xmax - mm 25 25 29
Frame OD w/Gasket - in 325mm - 12 51/64 395mm - 15-35/64 470mm - 18-1/2
Mounting Diameter - in 288mm - 11-11/32 350mm - 13-25/32 422mm - 16-39/94
Mounting Depth - in 243mm - 9-9/16 255mm - 10 288mm - 11-11/32
Motor Diameter - in 236mm - 9-19/64 236mm - 9-19/64 236mm - 9-19/64
Motor Depth - in 115mm - 4-17/32 115mm - 4-17/32 115mm - 4-17/32
Sealed Enclosure - cu ft N/A N/A N/A
Ported Enclosure - cu ft 1.75 - 2.75 3 - 5 5 - 6

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.

extended pole piece
Extended Pole Piece
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The REDLINE subs feature extended pole pieces for added high excursion control and improved heat dissipation.

shorting ring
Aluminum Shorting Ring
Redline Series Subwoofers
Back Plate Coil Gap Venting
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The motor’s backplate features precision drilled vents in the coil gap for increased voice coil heat dissipation.

Redline Series Subwoofers
DD Cast Baskets
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DD cast baskets are custom designed for strength, stability, and precision. Using cast aluminum allows for added heat dissipation properties as well as high rigidity and low resonance. All these qualities combined, result in a basket that supports powerful high excursion designs. 

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.

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The surround uses our EROM( Extended Range Of Motion) profile, copied en masse to become an industry wide standard. The EROM design gives long, controlled excursion while keeping the cone diameter as large as possible. This profile also saves mass over the sculpted rubber surrounds and inner tube style surrounds, less mass is louder and faster.

The EROM profile, nearly parallel walls with a half-round top, is more self-supporting than the wide half-roll type surrounds. This enables the surround to become part of the suspension compliance, helping to control the high forces of the accelerating moving mass and enabling the coil to better track incoming signal.

The DD EROM profile innovation allows for more cone area, lower mass and increased stiffness. It’s no wonder than the DD EROM has become the most copied surround in the world.

High-temp, aluminum former voice coils
Laminated Spiders
Non-pressed paper cones
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