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Gravity

Gravity WZ4000.1D 1-Ohm Stable Monoblock Car Amplifier

1800W1150W650W

Amplify Your Audio with Precision and Power Introducing the Gravity 4000.1D Class D Car Audio Amplifier. Designed to deliver exceptional bass performance and high power output to your car audio system. Brand: Gravity Model: WZ4000.1D Class: D RMS Power: 1800 Watts @ 1 Ohm Max Power: 4000W Stab...

$249.99*
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

Amplify Your Audio with Precision and Power

Introducing the Gravity 4000.1D Class D Car Audio Amplifier. Designed to deliver exceptional bass performance and high power output to your car audio system.

  • Brand: Gravity
  • Model: WZ4000.1D
  • Class: D
  • RMS Power: 1800 Watts @ 1 Ohm
  • Max Power: 4000W
  • Stability: 1/2/4 Ohm Stable
  • Type: Digital, Monoblock
  • Power Supply: Mosfet

Key Features

Class D Amplifier 1800W RMS @ 1 Ohm, 1150W RMS @ 2 Ohm, 650W RMS @ 4 Ohm. Bass Knob Included

Small footprint and compact chassis makes this mono amplifier easy to install in any vehicle or car audio application; but don’t let the size fool you, this 4000 watt amplifier absolutely pounds

Engineered to be the most efficient car monoblock amplifier in its class so that you can get the most out of your vehicle’s electrical system

MOSFET pulse width modulated power supply and proprietary heat dissipation design will ensure the amplifier for car subwoofers runs cool for even the most demanding playlists

4-way protection circuitry features high voltage, low voltage, over current, and high-temperature protection; sleep easy at night knowing your class d amplifier car audio is protected

Specifications

Class
Class D
RMS Power @ 1 Ohm
1800W
RMS Power @ 2 Ohm
1150W
RMS Power @ 4 Ohm
650W
Protection Circuitry
4-way (High Voltage, Low Voltage, Over Current, High-Temperature)
Power Supply
MOSFET Pulse Width Modulated
Included Accessories
Bass Knob
Chassis Size
Compact
Heat Management
Proprietary Heat Dissipation Design

Pros & Cons

👍 Pros

  • Delivers significant power with 1800W RMS at 1 Ohm, ensuring ample output for demanding car audio systems.
  • Features a compact footprint and chassis, making it notably easy to install in various vehicle types without consuming much space.
  • Engineered for high efficiency, optimizing power usage from the vehicle's electrical system for enhanced performance.
  • Incorporates a MOSFET pulse width modulated power supply and proprietary heat dissipation, promoting cool operation even during intense use.
  • Equipped with comprehensive 4-way protection circuitry (high voltage, low voltage, over current, high-temperature), safeguarding the amplifier.
  • Includes a bass knob, allowing for convenient and on-the-fly adjustment of bass levels directly from the driver's seat.

👎 Cons

  • The 4000 watt peak power rating may be misleading for some buyers compared to the RMS power, which is the more critical specification.
  • As a monoblock amplifier, it is primarily designed for subwoofers, limiting its application for full-range speaker systems.
  • Requires careful attention to impedance matching to achieve the maximum 1800W RMS at 1 Ohm, which might be challenging for novice installers.
  • The specific sound characteristics or audio fidelity beyond raw power are not detailed, which might be a consideration for audiophiles.
  • Installation still requires technical knowledge of car audio wiring and system integration for optimal and safe operation.

Frequently Asked Questions

The Gravity WZ4000.1D amplifier delivers a maximum RMS power of 1800W when operating at 1 Ohm.
Yes, a bass knob is included with this amplifier, allowing for convenient adjustments to your bass levels.
No, as a monoblock amplifier, it is specifically designed for powering subwoofers, not full-range car speakers.
It features a MOSFET pulse width modulated power supply and a proprietary heat dissipation design to ensure it runs cool under demanding conditions.
This amplifier is equipped with comprehensive 4-way protection circuitry, guarding against high voltage, low voltage, over current, and high-temperature issues.
No, it is designed with a small footprint and compact chassis, making it easy to install in a variety of vehicles and car audio setups.
This amplifier is 1-Ohm stable and provides different RMS power outputs at 1 Ohm, 2 Ohm, and 4 Ohm impedances.

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