GZIA 135.4

With 4 x 100 watts RMS at 4 ohms or 4 x 140 watts RMS at 2 ohms, the GZIA 135.4 offers ample power reserves for front and rear speakers or high-performance component systems. Alternatively, the channels can be bridged, allowing the amplifier to be used flexibly for other system configurations.

The built-in high-pass and low-pass filters allow you to fine-tune the usable frequency range to match the connected speakers. A bass boost function is also available. The high-level input with automatic power-on (Auto-On) is particularly useful when integrating the system into existing factory audio systems.

To ensure a reliable power supply, the amplifier features generously sized connectors and a robust power supply. The black anodized aluminum heat sink provides effective heat dissipation and gives the power amplifier—with its “Ground Zero” lettering—a high-quality, understated look.

Highlights

• 4-Channel Car Hi-Fi Power Amplifier
• Analog Class A/B Amplifier Technology
• 4 x 100 watts RMS at 4 ohms
• 4 x 140 watts RMS at 2 ohms
• Channels can be bridged for higher output power
• Integrated variable active crossover
• Adjustable High-Pass Filter (HPF)
• Adjustable Low-Pass Filter (LPF)
• Adjustable bass boost function
• High-level input for easy OEM integration
• Automatic power-on function via high-level input
• Reliable Power Supply
• Generously sized power and speaker connections
• Black anodized heat sink
• Compact height of just 49 mm
• Part of the Ground Zero IRIDIUM series
  
  

Technical Specifications

• Manufacturer: Ground Zero
• Model: GZIA 135.4
• Product Line: IRIDIUM
• Item Number: 11427220
• Amplifier Type: 4-Channel Class A/B Power Amplifier
• Number of channels: 4
• RMS power at 4 ohms: 4 x 100 watts
• RMS power at 2 ohms: 4 x 140 watts
• Maximum output power: 640 watts (CEA-2006A / 10% THD+N)
• Bridge Mode: 2 channels can be bridged
• Frequency response: 8 Hz – 28 kHz
• Low-pass filter (LPF): 30–250 Hz
• Low-pass slope: 12 dB/octave
• High-pass filter (HPF): 40 Hz – 3 kHz
• High-pass slope: 12 dB/octave
• Bandpass filter (BPF): No
• Bass Boost: Yes
• Phase control: No
• Signal-to-noise ratio (SNR): > 100 dB (A-weighted)
• Total Harmonic Distortion plus Noise (THD+N): < 0.1%
• Input sensitivity: 400 mV – 6 V
• High-level input: Yes
• Auto-On Feature: Yes
• BIAS Control: No
• Link mode: No
• Operating voltage: 9–16 V
• Fuse rating: 2 x 30 A
• Recommended power cable cross-sectional area: at least 20 mm² / 4 AWG
• Recommended speaker cable cross-sectional area: at least 1.5 mm² / 16 AWG
• Dimensions (W x H x L): 168 x 49 x 278 mm
• Heat sink: black anodized