The 35s feature the same voice coils used in the 9500 Series - 3 inches in diameter with longer winding lengths than the previous Series. This large diameter voice coil and high energy motor combine to produce the tremendous amount of force needed to reproduce the impact in today’s bass intensive music. This motor system also utilizes the DD exclusive FREE FLOW COOLING SYSTEM, we increased the number of vents to spread the heat dissapation over a wider area. Seperate cooling vents machined into the voice coil, top plate and pole piece focus cooling air into the magnetic gap and around both sides of the voice coil with every up and down stroke. This high-tech, precision machined cooling system actually lowers the working temperature of the voice coil, thereby lowering the stress on the entire audio system. The harder the speaker works, the more air is blown onto the coil wire, cool, huh. Its one of our patent-pending designs and it's only on DD products.

The 3500e also uses our American made, Synthetic Spider Suspension, our Synthetic Fiber Blend (SFB) cone stock, and EROM surrounds. The lead wires are Direct Connection terminations with 10 gauge battery cable hook-up wire. These features combine to make the 3500e Series drivers capable of over 3.0 inches of useable, continuous excursion. The 3500e Series are all about extracting every last bit of efficiency from a system design.

In keeping with stringent DD standards, the 35s have low moving mass, use a well controlled suspension and are powered by our own precision machined motor assemblies. These features make the 3500e Series driver a perfect choice for a wide variety of system designs. The 3500 Series woofers have been part of award winning SQ systems, brutal ground-pounders, record setting SPL cars and countless enthusiast systems around the world. The DD way isn't the most cost effective way to build speakers, in fact its about 180 degrees off, but it produces the best speakers possible.

SPECIFICATIONS
	Series 3500e Voice Coil Diameter 3" Magnet Weight 200 oz Power Handling RMS/Peak 1200/4800 Suspension 80 mm Nominal Impedance D .35 - 4.0 Ohm DC Resistance D .35 - 3.6 Ohm Model 3510e 3512e 3515e 3518e Rec Box (cubic ft) 1.5 2.5 4 6 Port Area (sq in) 28 44 68 102 Port Length (inches) 16 16 16 16 Woofer Diameter 10" 12" 15" 18" Free Air Resonance 33 Hz 32 Hz 30 Hz 27 Hz Qts 0.35 0.36 0.38   Qes 0.38 0.39 0.41   Qms 4.33 4.81 5.05   Vas 18 L 40 L 112 L   Sensitivity 86.5 dB 89 dB 92 dB 93 dB Shipping Weight 33 lbs 35 lbs 37 lbs 42 lbs

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