Digital Designs DD 3518 e DVC 4

Digital Designs DD 3518 e
DVC4-Variante mit 2x 4 Ohm Doppelschwingspule

• CNC machined motor structure
• 240 oz triple stacked strontium ferrite magnet
• 3 inch dual voice coils with 1200 watts continuous power handling
• Free Flow Cooling System
• Multi-layer synthetic spider suspension
• Proprietary EROM surround profile
• SFB cone stock - Synthetic Fiber Blend

DD3500e

The new 3500 'e' Series subwoofers have been redesigned to utilize more features and manufacturing techniques from the 9500 series. The "e" series changes include new cast baskets with more cooling and more excursion, larger magnets (the magnet weight jumps to 240 ounces), longer coil windings and increased internal motor cooling.

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.

The 3500 series is optionally available with Composite Cones.

We recommend to allow at least several weeks of playing time to break in DD Woofers, full break in may take many months. DO NOT play subwoofers at max amplifier power in the first couple of days, give the suspensions a chance to loosen up. As the suspension breaks in, the subs will play lower and louder.
After you give the woofers a chance to break in (you'll know when this happens because the woofers will be playing lower and louder) you can start to look at port changes to alter the sound to your personal taste and your vehicles acoustic loading conditions.


SPECIFICATIONS
Series     3500e
Voice Coil Diameter     3"
Magnet Weight     240 oz
Power Handling RMS/Peak     1200/4800
Suspension Travel     80 mm
Nominal Impedance    D4.0 Ohm
DC Resistance     D 4.0 Ohm
Model     3518e
Rec Box (cubic ft)     6
Port Area (sq in)     100
Port Length (inches)     20
Woofer Diameter     18"

Free Air Resonance    27 Hz
Sensitivity     93 dB
Shipping Weight     42 lbs