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Gravity 4000.1D 4000W Class D Car Amplifier Bundle — main product image
Gravity

Gravity 4000.1D 4000W Class D Car Amplifier Bundle

★★★★★5.0 (1 reviews)
11.3 in8.3 in2.5 in4000W

Experience Powerful Bass PerformanceThe Gravity 4000.1D Class D Car Amplifier is engineered to deliver exceptional bass performance for your car audio system. This monoblock amplifier is 1 Ohm stable, features a MOSFET power supply, and is designed to provide high power and reliability... 4000W ...

$189.99*
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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 Performance

The Gravity 4000.1D Class D Car Amplifier is engineered to deliver exceptional bass performance for your car audio system. This monoblock amplifier is 1 Ohm stable, features a MOSFET power supply, and is designed to provide high power and reliability...

  • 4000W Max Class D @ 1 Ohm, Stable at 2 Ohm and 4 Ohm with Bass Knob Included (2nd Generation).
  • 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.

Dimensions:

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

Key Features

4000W Max Class D @ 1 Ohm, Stable at 2 Ohm and 4 Ohm with Bass Knob Included (2nd Generation)

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

Brand
Gravity
Model
4000.1D
Type
Class D Car Amplifier
Max Power
4000W at 1 Ohm
Stability
1 Ohm, 2 Ohm, 4 Ohm
S/N 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 × 211 mm × 64.5 mm (11.3 in × 8.3 in × 2.5 in)
Included Accessory
Bass Knob (2nd Generation)

Pros & Cons

👍 Pros

  • Offers 4000W Max Class D power at 1 Ohm, delivering substantial output for subwoofers.
  • Stable operation at 2 Ohm and 4 Ohm impedances, providing flexibility for various speaker setups.
  • Includes a bass knob, allowing for convenient adjustment of bass levels directly from the driver's seat.
  • Features high and low level inputs, ensuring compatibility with a wide range of head units.
  • Incorporates a variable low pass crossover and variable bass boost for fine-tuning audio output.

👎 Cons

  • The "4000W Max" rating does not specify RMS power, which is a more accurate measure of continuous output.
  • A Signal-to-Noise Ratio (S/N Ratio) greater than 70 dB is decent but not exceptional compared to high-fidelity amplifiers.
  • The Total Harmonic Distortion (THD) of less than 0.2% is acceptable for car audio but higher than audiophile-grade home equipment.
  • The fixed frequency response from 8 Hz to 180 Hz indicates it is primarily designed for subwoofer amplification, not full-range.
  • Detailed information on the specific generation of the included bass knob is not provided, making it hard to assess improvements.

Frequently Asked Questions

The Gravity 4000.1D Class D Car Amplifier offers a maximum power output of 4000W when stable at 1 Ohm impedance.
Yes, this amplifier is designed to be stable at 1 Ohm, 2 Ohm, and 4 Ohm, providing flexibility for various subwoofer configurations.
Yes, the Gravity 4000.1D amplifier bundle includes a 2nd Generation bass knob for convenient adjustment of bass levels.
The dimensions of the Gravity 4000.1D amplifier are 286 mm (11.3 in) in length, 211 mm (8.3 in) in width, and 64.5 mm (2.5 in) in height.
This amplifier has a frequency response range of 8 Hz ~ 180 Hz, indicating it is optimized for driving subwoofers.

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