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Product details

Key Features
  • Compact 8 inch format gives strong bass output without needing a large substage
  • Long-stroke design helps it deliver more low-frequency authority than a typical small woofer
  • Dual 2 ohm configuration suits compact mono amplifier setups well
  • Reinforced paper cone and copper voice coil give it proper subwoofer hardware, not just midbass capability
  • Works in a practical vented enclosure size while still delivering meaningful output
Advanced Specifications
  • Product type: High-quality SPL subwoofer
  • Series: Radioactive Series
  • Model: GZRW 8XSPL
  • Diameter: 20 cm / 8″
  • Power handling: 500W RMS / 1000W max
  • Impedance: 2 x 2 ohms
  • Efficiency: 84.6 dB
  • Power recommendation: 400 – 1000W
  • Voice coil: 50 mm / 2″ copper
  • Cone: Reinforced paper
  • Surround: Long stroke compound surround
  • Basket: Resonance-free steel
  • Spider: Polycot
  • Dust cap: IMPP with 3D structure logo
  • Xmax: 22 mm / 0.866″
  • Mounting diameter: 182 mm / 7.17″
  • Mounting depth: 133 mm / 5.24″
  • Resonance frequency (Fs): 45.8 Hz
  • Qts: 0.36
  • Vas: 7.4 L / 0.26 cu.ft.
  • Verification: Klippel® optimized
Enclosure Recommendation
  • Vented enclosure: 25L net / 0.883 cu.ft.
  • Port: 1 x 8 cm / 3.15"
  • Port length: 8.89"
  • F3: 38 Hz

*Above-mentioned enclosure recommendations are just a few possible variations. Please note that you should find the perfect tuning, especially port length, based on your car and own taste.

Best Suited For
  • Compact daily systems needing real subwoofer performance
  • Smaller vehicles and space-conscious installs
  • Builds where a 10 or 12 inch sub is not practical
  • Users wanting stronger bass from a compact enclosure
  • Installations using serious power in a smaller substage format
Why OSCA Backs This Product

This is a well-judged sub for builds where space, power, and output all need to stay in balance. It makes sense as an all-round compact subwoofer because it still delivers proper bass performance without demanding the enclosure size of a larger driver.

Trusted Brands for Serious Systems

Selected for Real-World Performance

Cutting Through the Noise of Car Audio

About Ground Zero 🚀

Ground Zero, established in 1995, is a German-engineered car audio brand with strong American performance roots, known for delivering high-output, competition-proven equipment built on real engineering, not hype. With distribution in over 80 countries and a full range of system components developed in Germany, the brand has earned global respect through consistent results in independent testing and demanding installs. From its origins in high-excursion subwoofer design to its evolution into a complete system solution, Ground Zero remains a go-to for enthusiasts and installers who value output, reliability, and proven performance.

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