Prodigy Audio NB5-8D2 / NB5-8D4 8" 800 Watt RMS Subwoofer

Prodigy Audio NB5-8D2 / NB5-8D4 8" 800 Watt RMS Subwoofer

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The Prodigy Audio NB5-8D2 / NB5-8D4 8" 800 Watt RMS Subwoofer is a NB5 high-performance car audio subwoofer rated at 800 watts RMS with a dual 2 ohm or dual 4 ohm voice-coil configuration. It is designed for compact high-output bass systems that need serious power handling and excursion from an 8-inch driver.

This page includes the published fitment and T/S information needed to plan the amplifier, final ohm load, enclosure, speaker wire, and electrical support. Match the subwoofer from continuous power and real impedance—not from peak wattage alone.

Key Prodigy Audio Subwoofer Specifications

• Series: NB5 high-performance
• Size: 8-inch
• Continuous power handling: 800 watts RMS
• Voice-coil configuration: dual 2 ohm or dual 4 ohm
• One-way Xmax: 17 mm
• Mounting depth: 6.500 inches
• Cutout diameter: 7.375 inches
• Overall diameter: 8.625 inches
• Driver displacement: 0.09 cubic feet

Motor, Cooling, Cone, and Suspension Features

• 2.50-inch black aluminum voice coil with flat aluminum wire
• Large inner pole with upper and lower Faraday shorting rings
• 180 ounces of ferrite motor force
• Vented pole and radial coil-gap cooling
• Heavy-duty cast aluminum frame
• Nomex spiders with stitched-in tinsel leads
• Treated paper cone, carbon-fiber dust cap, and heavy-duty foam surround
• 28 mm forward and 50 mm downward mechanical clearance

Published T/S Parameters

• D2 — Re: 3.6, Fs: 38.77, Vas: 6.923, Qes: 0.489, Qms: 2.512, Qts: 0.410, BL: 20.23, Mms: 164.5 g, Cms: 95.517, sensitivity: 82.1 dB, Xmax: 17 mm
• D4 — Re: 6.8, Fs: 39.995, Vas: 7.21, Qes: 0.544, Qms: 2.598, Qts: 0.450, BL: 22.541, Mms: 151.33 g, Cms: 104.2, sensitivity: 84.01 dB, Xmax: 17 mm

Match the Subwoofer, Amplifier, and Enclosure

The amplifier must provide appropriate RMS output at the final wired load. The enclosure must fit the exact subwoofer's air-space, mounting-depth, cutout, displacement, excursion, and intended response requirements. A random box can limit output or control even when the subwoofer and amplifier are good.

Because this model is offered in dual 2-ohm and dual 4-ohm versions, read Dual 2 Ohm versus Dual 4 Ohm subwoofers before choosing the voice-coil option.

Shop more Prodigy Audio subwoofers, compare all car audio subwoofers, browse Prodigy Audio amplifiers, or choose from subwoofer boxes and enclosures.

Helpful Subwoofer System Guides

Use the subwoofer wiring diagrams and ohm-load guide to calculate the final load, the subwoofer box guide to plan the enclosure, and the subwoofer specifications guide to understand the T/S data listed on this page.

The complete car audio bass setup guide explains how the subwoofer, amplifier, box, wiring, grounding, fusing, battery, and alternator work together.

Shop Prodigy Audio at Audio Sellerz

Browse the complete Prodigy Audio collection at Audio Sellerz or learn more about the brand in why Audio Sellerz partnered with Prodigy Audio.

Frequently Asked Questions

What amplifier should be used with this subwoofer?

Match amplifier RMS output to the subwoofer's continuous rating at the final wired impedance. Leave room for clean tuning and set gain correctly instead of relying on maximum-power numbers.

Why does voice-coil configuration matter?

The voice coils and wiring method create the final impedance seen by the amplifier. The final load must remain within the amplifier's rated operating range.

Can this subwoofer use any box?

No. Verify mounting depth, cutout, driver displacement, recommended air space, enclosure type, port requirements when applicable, and vehicle space before building or ordering an enclosure.

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