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Product details

Advanced Specifications
  • Product type: Compact 5-channel Class D amplifier
  • Series: Hydrogen Series
  • Model: GZHA MINI FIVE
  • Channels: 5
  • Output power @ 4Ω: 4 × 75W + 190W RMS
  • Output power @ 2Ω: 4 × 125W + 320W RMS
  • Subwoofer output @ 1Ω: 500W RMS
  • Bridged output @ 4Ω, channels 1–4: 2 × 250W RMS
  • Maximum output power: 1200W, CEA-2006A / 10% THD+N
  • Frequency response: 5Hz–38kHz
  • Crossover functions: HPF / LPF / BPF
  • Bass boost: No
  • Phase adjustment: No
  • Input modes: 2-channel / 4-channel / 5-channel
  • High-level input: Yes
  • Auto turn-on: Yes
  • Subwoofer stability:
  • Main-channel stereo stability:
  • Main-channel bridged stability:
  • Bass remote: GZTA wired bass remote included
  • Input sensitivity: 300mV–6V
  • Internal fusing: 2 × 40A
  • Dimensions: 135 × 322 × 52mm
Key Features
  • Powers four full-range speakers and a subwoofer from one compact amplifier
  • Dedicated subwoofer channel delivers 500W RMS at 1 ohm
  • Main channels provide up to 4 × 125W RMS at 2 ohms
  • Selectable 2-, 4- and 5-channel input modes support different source configurations
  • High-level input, auto turn-on and included bass remote improve integration and everyday control
Best Suited For
  • Complete systems using four speakers and one subwoofer
  • Space-conscious installs where two separate amplifiers are undesirable
  • OEM-retain upgrades using high-level signal
  • Daily sound-quality systems needing useful speaker and subwoofer power
  • Builds where simple system architecture and serviceability matter
Why OSCA Backs This Product

GZHA MINI FIVE will let you run an entire conventional system from one chassis. Four speaker channels plus a proper 1-ohm subwoofer channel means fewer components, less wiring and a cleaner installation without reducing the system to entry-level power.

A metallic square badge with rounded corners on a dark background, featuring the text 'Hy' and 'Hydrogen' in white. Below the badge, the text reads 'GROUND ZERO HYDROGEN SERIES' with a small tagline underneath.

High-Grade Technology


Ground Zero’s Hydrogen Series is built for serious sound, combining high-grade engineering, huge power handling, clean sound quality and high-SPL capability across subwoofers, component speakers and compact MINI amplifiers.

Designed for demanding daily systems and competition-level builds alike, Hydrogen delivers hard-hitting performance without compromising control or refinement.

More Information

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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