Gravity

Gravity 3000.1D Class D Monoblock Car Amplifier 3000W

8.8 in8.3 in2.5 in3000W

Class D monoblock amplifier delivering up to 3,000 watts of bass power with included remote bass knob.

$149.99*
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*Price sourced from Amazon.com. Last updated:Oct 21, 2026.Price and availability are subject to change — details.

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Overview

The Gravity 3000.1D is a Class D monoblock car amplifier built specifically for powering subwoofers. Rated at a maximum of 3,000 watts at 1 ohm, it utilizes a MOSFET power supply and efficient Class D topology to deliver high output with reduced current draw and heat generation compared to traditional amplifier designs. The amplifier is stable at 1-ohm, 2-ohm, and 4-ohm impedance loads, providing flexibility to work with a variety of subwoofer configurations and wiring schemes.

Control features include a variable low pass filter adjustable from 40 Hz to 180 Hz, a subsonic filter ranging from 0 to 50 Hz to protect subwoofers from damaging ultra-low frequencies, and a variable bass boost of 0 to 12 dB. Both high-level and low-level inputs are provided, making the amplifier compatible with aftermarket head units as well as factory stereo systems that lack preamp outputs. The included 2nd-generation remote bass knob gives the driver convenient control over bass intensity without reaching the trunk or under-seat mounting location. At roughly 8.8 × 8.3 × 2.5 inches, the 3000.1D maintains a compact form factor that simplifies installation in most vehicles.

Key Features

POWERFUL - Gravity 3000.1D second-generation digital monoblock amplifier delivers up to 3000 watts maximum output at 1 ohm and remains stable at 2- and 4-ohm loads, built to drive demanding car audio subwoofer systems.

CONTROL - Shape low-frequency output with a variable 40-180 Hz low-pass crossover, 0-50 Hz subsonic filter, and 0-12 dB bass boost. Included remote bass knob provides convenient level adjustment from the driver’s seat.

VERSATILE - High- and low-level inputs support integration with aftermarket head units and factory-style audio systems. The MOSFET power supply and Class D design provide efficient monoblock amplification for dedicated bass channels.

CLARITY - Designed for focused subwoofer reproduction, this amplifier offers a frequency response of 8 Hz to 180 Hz, signal-to-noise ratio above 70 dB, and total harmonic distortion below 0.2% for controlled low-end playback.

COMPACT - Measuring 8.8 x 8.3 x 2.5 inches (223.5 x 211 x 64.5 mm), the compact chassis helps simplify installation in many vehicle audio builds while retaining the output controls needed for system tuning.

INCLUDED - A remote bass level knob is supplied for on-the-fly subwoofer adjustment, letting users tailor bass output for different recordings and listening preferences without reaching for the amplifier’s main controls.

Specifications

Brand
Gravity
Model
3000.1D
Amplifier Class
Class D Monoblock
Maximum Power
3,000 Watts @ 1 Ohm
Impedance Stability
1 Ohm, 2 Ohm, 4 Ohm
Power Supply
MOSFET
Signal-to-Noise Ratio
> 70 dB
Frequency Response
8 Hz – 180 Hz
THD
< 0.2%
Bass Boost
0 – 12 dB
Low Pass Filter
40 Hz – 180 Hz
Subsonic Filter
0 – 50 Hz
Inputs
High-Level and Low-Level
Dimensions (L × W × H)
223.5mm × 211mm × 64.5mm (8.8 × 8.3 × 2.5 in)
Included Accessories
Remote Bass Knob (2nd Generation)

Frequently Asked Questions

The amplifier is stable at 1-ohm, 2-ohm, and 4-ohm loads, with maximum power output of 3,000 watts achieved at 1 ohm.
Yes, a 2nd-generation remote bass knob is included, allowing you to adjust bass boost levels from the driver's seat without accessing the amplifier.
Yes, the 3000.1D features both high-level and low-level inputs, so it can accept speaker-level signals from factory stereos as well as standard RCA preamp outputs.
The variable low pass filter is adjustable from 40 Hz to 180 Hz, letting you set the crossover point to match your subwoofer and enclosure setup.
The unit measures 223.5mm × 211mm × 64.5mm (approximately 8.8 × 8.3 × 2.5 inches), making it a relatively compact monoblock for its power rating.