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DD Audio 1506A 6.5" 750 Watt RMS Dual 2-Ohm Voice Coil High Excursion Subwoofer

SKU DD-1506A-D2
Save 20% Save 20%
Original price $499.00
Original price $499.00 - Original price $499.00
Original price $499.00
Current price $399.00
$399.00 - $399.00
Current price $399.00

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  • Features a NEW Aluminum 2 Stage Motor Heatsink for enhanced cooling.
  • Excursion Optimized ESP Frame and V-ROM Vario-Density Surround enhance performance and durability.
  • The cone is made in the USA and features a blend of Carbon Fiber, Kevlar, and other fibers for exceptional strength and stiffness, resulting in audibly superior sound quality.
  • Ideal for installations under second-row bench seating in trucks or SUVs, utilizing previously untapped real estate for sub enclosures.
  • Specifications include a RMS power of 750W and peak power of 2400W, with a D2 impedance and a piston diameter of 5.5".

DD Audio 1506A 6.5" 750 Watt RMS Dual 2-Ohm Voice Coil High Excursion Subwoofer

This listing includes:

  • (1) DD Audio 1506A 6.5" Subwoofer

The 1506A is for those who find value in large motors with advanced cooling features, who want the absolute peak of performance every time they start their vehicle, who simply can’t and won’t settle for second best. Now with all the features you've come to expect from the larger 9900C, 9500L, and 2508G. The 1506A revision completes this arc, not with a whimper, but with a bang, ushering in a new era for these made by hand, in the heartland, subwoofers at DD Audio. Check under your second row bench seating in your truck or SUV and you may find untapped real estate that's perfect for a sub enclosure. Given the dimension though, you likely won’t be fitting giant subs in any box that fits. That’s where the 6.5" comes in. You can recreate the big bass effect of larger subwoofers with an array of smaller ones, and there’s no small subwoofer that does it better than the new 1506A. 


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 finned aluminum, backplate mounted, heat sink. 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. 


Complementing the improved surround is DD'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.

*Spider color may vary depending on production run - design, material, and build quality remain the same.


The voice coil is Made in the USA, and has evolved over generations to be the envy of DD's competitors. Among the 5 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 (again, acting as a heat sink). The wire and adhesives are manufactured to endure the most extreme high temperatures and the coil thermosetting occurs over 2 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 is a work of pure magnetic magic. DD AUDIO uses their own proprietary magnet tooling to maximize the surface area transfer from the low carbon back and top plates. The motor on the 1506a perfectly protects DD AUDIO's reputation for having the tightest gaps in the industry, with minimal tolerances around the coil windings for increased gap flux. On custom orders, DD offers the option of SuperCharging the gap with neo to further increase flux by 30% or more. The motor also features DD AUDIO's Free Flow Cooling System, which 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.


This sub is Made in the USA with as many Made in the USA components as DD AUDIO can reasonably acquire. 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 Fiber. 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; and to hear the difference of the 1506a is to hear the difference of handmade, USA build quality.


  • NEW Aluminum 2 Stage Motor Heatsink

  • 152.4mm Magnet Diameter

  • Multi-Vent Free Flow Cooling Motor

  • Shorting Ring Motor

  • High-Temp Voice Coil

  • Excursion Optimized ESP Frame

  • V-ROM Vario-Density Surround

  • Non-Pressed Composite Reinforced Pulp Cone

  • 5.75" Dual Layer Iron Cloth Spider

  • Laminated Tinsel Leads

  • Hand Laid Composite Dust Cap

  • Embossed DDesign Magnet Boot

  • Made In USA

  • Optional Upgrade: SuperCharge


  • Model Number: 1506A

  • Speaker Size (In): 6.5

  • Watts RMS: 750

  • Watts Peak: 2400

  • Impedance: D2

  • VCD (In): 2

  • Piston Diameter (In): 5.5

  • Fs (Hz): 47.78

  • Qms: 5.152

  • Qes: 0.864

  • Qts: 0.740

  • Vas (Liters): 2.398

  • Xmech (MM): 48

  • Xmax (MM): 10

  • Frame OD (In): 7 7/16

  • Frame OD w/Gasket (In): 7 9/16

  • Mounting Diameter (In): 6 5/16

  • Mounting Depth (In): 6 1/4

  • Motor Diameter (In): 6

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