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Gravity

Gravity 4000.1D Car Amplifier 4000W 1 Ohm Kit

Experience Powerful Bass with Precision ControlThe Gravity 4000.1D Class D Car Amplifier delivers exceptional bass performance with unmatched power and reliability. Designed for subwoofer enthusiasts, this monoblock amplifier includes a 4 Gauge Kit for easy installation. Specifications: 4000...

$159.99*
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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

Experience Powerful Bass with Precision Control

The Gravity 4000.1D Class D Car Amplifier delivers exceptional bass performance with unmatched power and reliability. Designed for subwoofer enthusiasts, this monoblock amplifier includes a 4 Gauge Kit for easy installation.

Specifications:

  • 4000W Max Class D @ 1 Ohm
  • Stable at 2 Ohm and 4 Ohm
  • S/N Ratio > 70 dB
  • Frequency Response: 8 Hz ~ 180 Hz
  • THD <0.2%
  • Bass Boost Level: 0 ~ 12 dB
  • LPF: 40 Hz ~ 180 Hz
  • Subsonic Filter: 0 ~ 50 Hz
  • High- and Low-Level Inputs
  • Dimensions: 11.3" x 8.3" x 2.5"

Key Features

4000W Max Class D @ 1 Ohm, Stable at 2 Ohm and 4 Ohm with Bass Knob Included 4 Gauge Blue Bundle

S/N Ratio > 70 dB with Frequency Response at 8 Hz ~ 180 Hz and THD < 0.2%

Bass Boost Level 0 ~ 12 dB with LPF 40 Hz ~ 180 Hz and Subsonic Filter 0 ~ 50 Hz

High and Low Level Inputs, Variable Low Pass Crossover, Variable Bass Boost

Dimension ( L×W×H ): 286 mm (11.3 in) × 211 mm (8.3 in) × 64.5 mm (2.5 in)

Specifications

Max Power Output
4000W Class D @ 1 Ohm
Stable Impedance
1 Ohm, 2 Ohm, 4 Ohm
Signal-to-Noise Ratio
&gt; 70 dB
Frequency Response
8 Hz ~ 180 Hz
THD
&lt; 0.2%
Bass Boost Level
0 ~ 12 dB
LPF
40 Hz ~ 180 Hz
Subsonic Filter
0 ~ 50 Hz
Inputs
High and Low Level
Dimensions (L×W×H)
286 mm (11.3 in) × 211 mm (8.3 in) × 64.5 mm (2.5 in)
Included Accessories
Bass Knob, 4 Gauge Blue Bundle

Pros & Cons

👍 Pros

  • Delivers a powerful 4000W Max Class D output at 1 Ohm, suitable for high-performance audio systems.
  • Offers stable operation at 2 Ohm and 4 Ohm loads, providing flexibility for various speaker configurations.
  • Includes a bass knob, allowing for convenient adjustment of bass levels directly from the driver's seat.
  • Maintains a strong signal-to-noise ratio of > 70 dB, contributing to cleaner audio output.
  • Features variable low pass crossover and subsonic filter settings for precise audio tuning and speaker protection.

👎 Cons

  • The maximum power of 4000W is a "Max Class D" rating, which may not represent continuous RMS power output.
  • A frequency response range of 8 Hz ~ 180 Hz indicates it is primarily designed for subwoofer applications and not full-range audio.
  • The Total Harmonic Distortion (THD) is specified as < 0.2%, which, while low, may be higher than some audiophile-grade amplifiers.
  • The amplifier's specific RMS power output at different impedances is not provided, making it harder to compare its sustained performance.
  • The included "4 Gauge Blue Bundle" is general and its quality or completeness for all installation needs is not detailed.

Frequently Asked Questions

This Gravity car amplifier has a 4000W Max Class D output when operating at 1 Ohm.
Yes, it is stable at 1 Ohm, 2 Ohm, and 4 Ohm loads, offering versatility for speaker configurations.
Yes, a bass knob is included with the amplifier for convenient bass level adjustments.
The amplifier has a frequency response ranging from 8 Hz to 180 Hz.
It features variable low pass crossover, a variable bass boost from 0 to 12 dB, and a subsonic filter from 0 to 50 Hz.

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