Gravity WZ4000-1D Class D Monoblock Amplifier

The Gravity Warzone WZ4000-1D is a Class D monoblock car audio amplifier designed to power subwoofer systems. It provides a single amplified channel with stable operation at 1, 2, or 4 ohms. This makes it suitable for builders who need a dedicated bass amplifier for a custom vehicle audio upgrade.

Rated output is 1800 watts RMS at 1 ohm, 1150 watts RMS at 2 ohms, and 650 watts RMS at 4 ohms. Its 4000-watt maximum-power rating is paired with a compact amplifier chassis. The selectable impedance capability gives installers flexibility when matching compatible subwoofer wiring configurations.

The WZ4000-1D is intended for systems where low-frequency output is the priority. A variable low-pass crossover helps focus the amplifier's output on bass frequencies, while the adjustable bass boost allows low-end tuning. A supplied bass knob provides a convenient way to adjust bass level from the listening position.

Gravity uses a MOSFET pulse-width-modulated power supply in this amplifier. The Class D design and heat-dissipation approach are intended to support efficient operation in a vehicle electrical system. A variable subsonic filter is also provided to help tailor the low-frequency operating range for the connected subwoofer system.

High- and low-level inputs support integration with a variety of source-unit signal types. The amplifier includes protection for high voltage, low voltage, over-current, and high-temperature conditions. Its compact 11.3-inch-long footprint can be useful when planning a dedicated subwoofer amplifier installation.

Key Features

• Monoblock Class D Design: Delivers dedicated single-channel power for a subwoofer system.
• 1-Ohm Stable Output: Supports compatible 1-, 2-, and 4-ohm subwoofer loads.
• 1800W RMS at 1 Ohm: Provides its highest listed continuous output at 1 ohm.
• MOSFET PWM Power Supply: Supports efficient power conversion for vehicle audio use.
• Variable Bass Controls: Includes adjustable low-pass, bass boost, and subsonic settings.
• Four-Way Protection: Monitors voltage, current, and temperature-related operating conditions.

Design & Installation

The WZ4000-1D uses a compact chassis measuring 11.3 by 8.3 by 2.5 inches. Its design combines a Class D monoblock layout, MOSFET PWM power supply, and heat-dissipation engineering. The control set includes adjustable crossover, bass boost, and subsonic-filter functions for system tuning.

Install the amplifier in a secure location with ventilation and use wiring appropriate for the amplifier and vehicle electrical system. Match the final subwoofer wiring load to one of the supported 1-, 2-, or 4-ohm configurations, and set gain and crossover controls during system calibration. High-level or low-level inputs can be selected based on the available signal from the audio system.