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  5. GZA 125.4-30A

GZA 125.4-30A

3 reviews

215 Watt

GZA 125.4-30A

3 reviews

Technical Highlights

  • 4-channel amplifier, Class A/B circuit, variable BIAS control.
  • Filterless signal paths, high-performance OPA 2134 amplifier.
  • MUNDORF® capacitors, gold-plated connectors, piano-finish heatsink.
  • More technical details
€439.10
-27% €599.00 €439.10
2% discount with credit card

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ProductGZA 125.4-30A

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datasheet
Ground Zero-GZA 125.4-30A-4-Kanal Verstärker-masori-kaufen
€439.10
€599.00 €439.10

The GZA 125.4-30A from Ground Zero is a 4-Channel Amplifier with a Class A/B circuit and a variable BIAS setting. The device features filterless signal paths and is equipped with high-performance OPA 2134 operational amplifiers. Technical specifications include MUNDORF audio capacitors and gold-plated connections. A massive heat sink in piano lacquer finish serves for heat dissipation. The output power is 4x 125 watts RMS at 4 ohms and 4x 215 watts RMS at 2 ohms. In bridged mode, the amplifier reaches a maximum output power of 2x 480 watts. The dimensions are 195 x 360 x 53 mm.

Features
  • 4-Channel Amplifier
  • Class A/B circuit
  • Variable BIAS setting
  • Filterless signal paths
  • High-performance OPA 2134 operational amplifiers
  • MUNDORF audio capacitors
  • Gold-plated connections
  • Massive heat sink in piano lacquer finish
  • Optimized turn-on delay
  • Dimensions: 195 x 360 x 53 mm
Technical Data
  • Output power @ 4 ohms: 4x 125 watts RMS
  • Output power @ 2 ohms: 4x 215 watts RMS
  • Maximum output power bridged: 2x 480 watts
  • Frequency response: 5 Hz – 70 kHz
  • Type: Sound Quality Amplifier
  • Number of channels: 4

Frequently Asked Questions about GZA 125.4-30A

What distinguishes the Ground Zero GZA 125.4-30A Amplifier?

The Ground Zero GZA 125.4-30A is a 4-Channel Amplifier that offers exceptional sound quality through its Class A/B circuitry and variable BIAS adjustment. The design is based on filterless signal paths, uses high-performance OPA 2134 operational amplifiers, and is equipped with MUNDORF® audio capacitors. This careful selection of components ensures precise audio transmission. The amplifier also features gold-plated connections and an optimized turn-on delay, providing high reliability even under demanding conditions. The massive heatsink with a piano lacquer finish emphasizes the high-end design for premium sound concepts.

What role does the Class A/B circuitry play in the GZA 125.4-30A Amplifier?

The Class A/B circuitry of the Ground Zero GZA 125.4-30A efficiently amplifies audio signals by combining the strengths of Class A and Class B circuits. Class A provides high audio quality with low distortion levels, while Class B improves efficiency. In the GZA 125.4-30A, these advantages come together for optimized sound transmission and increased power output. This circuitry not only favors clear sound but also enhances the thermal performance of the amplifier. Additionally, it allows for audio-enthusiast applications with varying sound dynamics, which is crucial in many high-end audio applications.

How does the variable BIAS adjustment improve the performance of the amplifier?

The variable BIAS adjustment of the GZA 125.4-30A allows for influencing the current flow through the transistors. This enables precise control of the operating point, significantly optimizing audio quality. This feature allows the amplifier to be tailored to the application or required sound profile, whether for a warmer sound representation or detailed precision. With flexible adjustment, the amplifier remains efficient and avoids overheating, ensuring the longevity of the components.

What is the function of the MUNDORF® audio capacitors?

The integrated MUNDORF® audio capacitors in the GZA 125.4-30A are known for their excellent properties in HiFi technology. They ensure a stable power supply and minimize distortion as well as losses in critical audio frequencies. Their high-quality construction helps reduce microphony effects, which is particularly advantageous in audiophile applications. These capacitors contribute to a direct and uncolored sound reproduction, significantly reducing the likelihood of sound distortions.

What advantages do the high-performance OPA 2134 operational amplifiers offer?

The use of high-performance OPA 2134 operational amplifiers in the GZA 125.4-30A means exceptional sound precision and clarity. These amplifiers provide high distortion-free performance and outstanding low noise. Compared to standard operational amplifiers, OPA 2134 models are known for their low distortion and ability to reproduce even the finest sound nuances without sacrificing dynamics. Additionally, their noise behavior stabilizes across various frequency ranges, resulting in a detailed yet harmonious sound image.

How does the optimized power-on delay affect the use of the amplifier?

The optimized power-on delay of the GZA 125.4-30A protects sensitive speakers and audio circuits from the power-on noise that can cause distortion or even damage in many amplifiers. This delay ensures that the amplifier is fully initialized before it forwards the audio signal. This prevents sudden voltage spikes and reduces the risk of clicks or disturbances during startup. Such a feature significantly optimizes the overall performance and longevity of the audio system.

What differences arise from filterless signal paths?

Filterless signal paths in the GZA 125.4-30A mean that no additional components can influence and alter the audio signal. This technique ensures that the signal retains its natural state within the amplifier, which is particularly beneficial for enthusiasts of high-quality audio productions. Without filter influence, the sound remains more direct and authentic, achieving a significantly more accurate reproduction. The ubiquitous signal distortion from cables or transitions is minimized, contributing to a clearer and purer sound transmission.

How does the massive heatsink in the GZA 125.4-30A contribute to performance?

The massive heatsink of the GZA 125.4-30A helps to efficiently dissipate the generated heat, which is particularly important under higher power demands. With a surface that distributes heat more effectively, the amplifier remains stable even under heavy loads and cools down faster, preventing overheating and failures. Its piano lacquer finish also gives the casing an aesthetic touch that stands out well in many installations. This leads to better thermal conduction and contributes to the longevity and stability of the amplifier.

Are the gold-plated connections relevant for sound quality?

The gold-plated connections in the GZA 125.4-30A provide improved conductivity and corrosion resistance. These properties are crucial for ensuring consistent audio transmission, as even the smallest resistance or corrosion can negatively affect sound quality. Gold plating minimizes these risks by protecting against oxidation and ensuring better contact. This reliability in signal transmission ensures that the audio signal remains as lossless as possible, which directly impacts improved sound quality.

How can the GZA 125.4-30A be integrated into an existing system?

The Ground Zero GZA 125.4-30A can be integrated into many existing car audio systems due to its standard dimensions and variable connection options. When installing, ensure there is enough space for the massive heatsink to allow for adequate ventilation. Enjoy flexible options in connection planning thanks to the gold-plated connections that ensure smooth integration. Plan the wiring carefully to avoid interference, and note that the amplifier should be installed by an experienced professional due to its complexity to achieve optimal results.

Manufacturer information/responsible person

Ground Zero GmbH
Erlenweg 25
85658 Egmating, Germany

Tel +49 (0)8095 873 830

E-Mail: info@ground-zero-audio.com

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