What is the Best 8-inch car Subwoofer?
Regarding car audio, having a quality subwoofer can make all the difference in your listening exp...
Read Article →Prodigy
SKU: NB5-8D4
The Prodigy Audio 8" NB5 Series Subwoofer is engineered for the enthusiast who refuses to compromise on output just because space is at a premium. Unlike typical small-diameter woofers, the NB5 series is built around a massive 180-ounce ferrite motor structure and a high-temp 2.5-inch flat aluminum voice coil. This combination allows for a conservative 800W RMS power rating, providing the "heavy-weight" performance needed to anchor a high-end SQL system in under-seat or hatch applications.
Precision is at the heart of the NB5's design. It features dual Aluminum ID Faraday shorting rings (upper and lower) which significantly reduce distortion caused by inductance throughout the cone's full range of motion. To keep the 2.5" coil cool during intense sessions, the motor utilizes a vented pole design with radial gap vents. This air-cooling system, paired with a heavy-duty cast aluminum frame that acts as a heat sink, ensures that the NB5 maintains its performance without thermal compression, even when pushed to its 17mm Xmax limit.
The NB5-8 isn't just about raw power; it’s about durability. It features an extreme-duty Nomex spider with stitched double tinsel leads to prevent lead-slap and ensure long-term reliability. The competition-grade treated paper cone is mated to a high-roll, heavy-duty foam surround, allowing for 28mm of mechanical clearance (X-mech) to handle unexpected transients. Whether you are aiming for a tight, punchy daily driver or a compact SPL demo box, the NB5 8-inch delivers the low-end authority typically reserved for much larger drivers.
| Model | NB5-8 (Series 5) |
| RMS Power | 800 Watts |
| Voice Coil Diameter | 2.50" Black Aluminum |
| Fs (Hz) | 38.77 (D2) / 39.99 (D4) |
| Xmax (One-Way) | 17mm (@ 70% BL) |
| X-Mech | 28mm (Forward) / 50mm (Downward) |
| Sensitivity (1W/1M) | 82.1dB (D2) / 84.0dB (D4) |
| Qts | 0.410 (D2) / 0.450 (D4) |
| Vas | 6.92L (D2) / 7.21L (D4) |
| Mounting Depth | 6.50" |
| Cutout Diameter | 7.375" |
| Displacement | 0.09 ft³ |
Pro Tip: EBP is just one factor in enclosure design. Always use complete Thiele-Small parameters and modeling software for optimal results. Our custom enclosures are engineered specifically for each subwoofer's parameters.
The Efficiency Bandwidth Product (EBP) is calculated by dividing the subwoofer's resonant frequency (Fs) by its electrical damping (Qes). This single number helps predict which enclosure type will work best with your subwoofer.
| Recommended Ported Vol. | 0.75 - 1.0 ft³ |
| Recommended Tuning | 32Hz - 36Hz |
| Port Area | 12 - 14 sq. in. |
| Sealed Enclosure | Not Recommended (Optimized for Ported) |
No enclosures have been added to this product yet.