Car Subwoofer - DD AUDIO 9921B D1

The 9900s 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 9900 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 9500 Series a brutally musical addition to our USA built lineup.

Driver Size (Inches): 21

Watts RMS: 1500 - 2500

Peak Power: 10000

Voice Coil Diameter: 4

Impedance: Dual 1ohm

Piston Diameter (Inches): 18 1/4

Fs (Hz): 26.24

QMS: 5.265

QES: 0.517

QTS: 0.471

Vas (Liters): 161.9

X-Mech (MM): 92

X-Max (MM): 22

Frame OD (Inches): 21 5/16

Frame OD w/Gasket (Inches): 21 5/16

Mounting Diameter (Inches): 19 1/4

Mounting Depth (Inches): 11 5/16

Motor Diameter (Inches): 10 5/16

Motor Depth (Inches): 4 9/16

Woofer Displacement (CuFt): 0.55

Ported Enclosure (CuFt): 6.00 - 8.00

Shipping Weight: 92