Car Subwoofer - DD AUDIO 3518I (ESP) D1

 The 3500s are some of our most sonically accurate sub-drivers. This accuracy comes from a low moving mass, ultra-high energy design that uses a crazy strong motor combined with long gap/long coil topology, that you’ll find on our legendary 9500 and 9900 subwoofers. Like their big brothers, the 3500 Series subs come with V-ROM surrounds, multi-layer spiders, 800-degree thermoset voice coils, and cast aluminum frames. All of these features combine to make the 3500 Series a brutally musical addition to our USA built lineup.

Driver Size (Inches): 18

Watts RMS: 600 - 1200

Peak Power: 4800

Voice Coil Diameter: 3

Impedance: Dual 1ohm

Piston Diameter (Inches): 15 1/2

Fs (Hz): 28.9

QMS: 5.4

QES: 0.97

QTS: 0.83

Vas (Liters): 146.2

X-Mech (MM): 62

X-Max (MM): 17.5

Frame OD (Inches): 18 1/4

Frame OD w/Gasket (Inches): 18 1/2

Mounting Diameter (Inches): 16 3/4

Mounting Depth (Inches): 10 7/8

Motor Diameter (Inches): 7 9/16

Motor Depth (Inches): 3 1/2

Woofer Displacement (CuFt): 0.38

Ported Enclosure (CuFt): 5.0 - 6.0

Shipping Weight: 52