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

Gravity 4000.1D 4000W Class D Car Amplifier Bundle

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 ...

$279.99*
✓ In Stock on Amazon.com
View on Amazon

*Price sourced from Amazon.com. Last updated:Oct 21, 2026.Price and availability are subject to change — details.

Affiliate Disclosure: As an Amazon Associate, Studio Supplies earns from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

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

POWERFUL - Gravity 4000.1D second-generation Class D monoblock delivers up to 4000 watts maximum at 1 ohm, with stable 2-ohm and 4-ohm operation for configuring a dedicated car subwoofer system.

CONTROL - Fine-tune low-frequency output with a 0-12 dB variable bass boost, 40-180 Hz low-pass filter, and 0-50 Hz subsonic filter, helping match amplifier output to subwoofers, enclosure, and music style.

CLEAN - Designed for focused bass reproduction, this digital amplifier provides a stated signal-to-noise ratio above 70 dB, THD below 0.2%, and an 8-180 Hz frequency response for low-frequency applications.

FLEXIBLE - High-level and low-level inputs support integration with a range of factory or aftermarket head units, while variable low-pass crossover and bass boost controls provide adaptable subwoofer system tuning.

EFFICIENT - Class D digital design and MOSFET power supply deliver compact subwoofer amplification in a chassis measuring 11.3 x 8.3 x 2.5 inches, or 286 x 211 x 64.5 mm, for easier vehicle placement.

BUNDLE - Includes the Gravity 4000.1D monoblock amplifier, bass control knob, and SoundXtreme AP6 Bass Machine, providing key components for adding adjustable low-frequency impact to a custom car audio installation.

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)

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.

Related Products