Welcome to OSCA Shop

We’re here to help you navigate car audio properly. We take pride in guiding enthusiasts of all levels, whether it’s a simple upgrade or a full system build.

Need Help? Talk to an expert

Product details

Key Features
  • Designed for high-output use where volume and projection are critical
  • High-efficiency design delivers strong output with minimal power demand
  • 6x9 format increases cone area for greater output and presence
  • Built to maintain clarity at elevated volume levels
  • Weather-resistant construction suited to exposed environments
Advanced Specifications
  • Speaker type: 2-way coaxial
  • Size: 6x9″
  • Power handling: 150W RMS / 300W max
  • Impedance: 4 ohms
  • Sensitivity: 94 dB
  • Frequency response: 50 Hz – 20 kHz
  • Cone: Pressed paper
  • Surround: High-excursion textile
  • Tweeter: 25 mm / 1″ Mylar dome
  • Crossover: 6 dB/oct high-pass filter
  • Motor: Ferrite
  • Voice coil: 1.5″ copper-clad aluminum
  • Basket: Resonance-free steel
  • Mounting diameter: 152 x 214 mm / 5.98″ x 8.43″
  • Mounting depth: 84 mm / 3.31″
  • Features: Klippel® optimised
  • Grille: Hexagon protection grille included
  • Application: Weather resistant / power sports
Best Suited For
  • Harley Davidson and power sports applications
  • High-output daily systems requiring strong projection
  • Rear fill or saddlebag speaker upgrades
  • Outdoor or exposed installations
  • Users prioritising volume and presence over subtlety
Why OSCA Backs This Product

We use these in a range of builds, but they really prove themselves in motorcycle setups. The output is there, but more importantly they stay controlled where most coaxials start to struggle.

Trusted Brands for Serious Systems

Selected for Real-World Performance

Cutting Through the Noise of Car Audio

Proven Performance, Engineered in Germany

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.

Learn more about our brands

Fast Dispatch

Orders processed within 24 hours

Authorised Australian Seller

Genuine products from verified suppliers

Standard 12-Month Warranty

Manufacturer warranty on all products

Expert Support Available

Technical assistance from audio specialists