GZHA MINI FIVE

The Ground Zero GZHA MINI FIVE is a powerful 5-channel amplifier from the Hydrogen series that can power a complete car audio system using just a single power amplifier. Four channels are available for front and rear speakers or an active front system, while the fifth channel is specifically designed for the subwoofer.

Despite its high output power, the amplifier remains exceptionally compact, measuring just 135 mm wide and 52 mm high. The efficient Class D circuitry reduces the space required and allows for installation even in locations where there is little room for traditional multichannel power amplifiers.

The GZHA MINI FIVE offers exceptional flexibility in system configuration. Speaker channels 1 through 4 are equipped with adjustable filters. For channels 3 and 4, a bandpass filter can also be implemented by combining high-pass and low-pass filters. The subwoofer channel has its own adjustable low-pass filter and is load-stable down to 1 ohm, with up to 500 watts RMS available.

In addition to RCA signals, high-level signals from a factory-installed radio can also be fed into the system. The built-in Auto-On function simplifies integration into OEM audio systems. A remote bass control also allows for convenient adjustment of the subwoofer level from the driver's seat.

Highlights

• Compact 5-Channel Class-D Car Hi-Fi Amplifier
• Four speaker channels plus a separate subwoofer channel
• Up to 1,200 watts of maximum output power according to CEA-2006-A
• Subwoofer channel is load-stable down to 1 ohm
• 500 watts RMS subwoofer power at 1 ohm
• Channels 1 through 4 with comprehensive active crossovers
• Bandpass configuration is possible on channels 3 and 4
• Adjustable low-pass filter for the subwoofer channel
• High-level input for integration into OEM systems
• Automatic power-on function via a high-level signal
• Bass Level Remote Control
• Stabilized Power Supply
• SMD Component Placement
• Large-diameter connections
• Solid, space-saving heat sink
• "Ground Zero" lettering on the heat sink
• Particularly compact dimensions
  
  

Technical Specifications

• Manufacturer: Ground Zero
• Model: GZHA MINI FIVE
• Series: Hydrogen
• Amplifier Type: 5-Channel Class-D Compact Amplifier
• Number of channels: 5
  
  

Output power, channels 1–4:

• 4 × 75 watts RMS into 4 ohms at ≤ 1% THD+N
• 4 × 125 watts RMS into 2 ohms at ≤ 1% THD+N
• 2 × 250 watts RMS at 4 ohms in bridge mode with ≤ 1% THD+N
• 2 × 300 watts into 4 ohms in bridge mode at ≤ 10% THD+N
  
  

Output power, Channel 5 / Subwoofer:

• 1 × 190 watts RMS into 4 ohms at ≤ 1% THD+N
• 1 × 320 watts RMS into 2 ohms at ≤ 1% THD+N
• 1 × 500 watts RMS into 1 ohm at ≤ 1% THD+N
• 1 × 600 watts into 1 ohm at ≤ 10% THD+N
  
  

Additional performance data:

• Maximum output power: 1,200 watts according to CEA-2006-A / 10% THD+N
• Damping factor: > 100
• Input sensitivity: 300 mV – 6 V
  
  

Crossover networks:

• High-pass filter, channels 1–2: 10–4,000 Hz
• High-pass slope, channels 1–2: 12 dB/octave
• High-pass filter, channels 3–4: 10 – 4,000 Hz
• Low-pass filter, channels 3–4: 50–4,000 Hz
• Slope of Channel 3–4: 12 dB/octave
• Bandpass operation is possible on channels 3–4
• Low-pass filter, channel 5: 50–250 Hz
• Channel 5 slope: 12 dB/octave
  
  

Frequency ranges according to the user manual:

• Channels 1–4: 10 Hz – 60 kHz (-3 dB)
• Channel 5: 20 Hz – 300 Hz (-3 dB)
  
  

Connections and Features:

• RCA low-level inputs
• High-Level Input
• Auto-On Function via High-Level Signal
• Bass Level Remote Control
• Variable Active Crossovers
• SMD Technology
• Stabilized Power Supply
• Class D circuit
• Internal fuse protection: 2 × 40 A
  
  

Dimensions:

• Width: 135 mm
• Height: 52 mm
• Length: 322 mm
• Overall dimensions (W × H × L): 135 × 52 × 322 mm
  
  

Scope of Application

The GZHA MINI FIVE is particularly well-suited for car audio systems in which front and rear speakers—or four speaker channels—are to be driven together with a subwoofer via a single power amplifier. Thanks to the 1-ohm-stable subwoofer channel and the extensive filtering options, powerful and flexibly configured audio systems can be implemented despite the compact design
.