---
product_id: 33765655
title: "Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Car Amplifier, 400W"
brand: "skar audio"
price: "357 kr"
currency: DKK
in_stock: false
reviews_count: 13
category: "Skar Audio"
url: https://www.desertcart.dk/products/33765655-skar-audio-sk-m4004d-compact-full-range-class-d-4
store_origin: DK
region: Denmark
---

# 400W max power output Ultra compact 7.9x4.6x1.7 in Adjustable HPF/LPF/Full-Range crossover Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Car Amplifier, 400W

**Brand:** skar audio
**Price:** 357 kr
**Availability:** ❌ Out of Stock

## Summary

> 🎵 Small Amp, Big Impact: Power Your Drive with Precision and Style

## Quick Answers

- **What is this?** Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Car Amplifier, 400W by skar audio
- **How much does it cost?** 357 kr with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/33765655-skar-audio-sk-m4004d-compact-full-range-class-d-4)

## Best For

- skar audio enthusiasts

## Why This Product

- Trusted skar audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Space-Savvy Design:** Ultra-compact footprint fits seamlessly into tight car spaces without compromising power or performance.
- • **Power Meets Precision:** Delivers 140W x 4 channels RMS at 2Ω for crystal-clear, distortion-free sound that commands attention.
- • **Tailored Sound Control:** Customizable crossover settings (HPF, LPF, Full-Range) let you fine-tune your audio experience like a pro.
- • **Built to Last & Protect:** 4-way protection circuitry guards against thermal, voltage, speaker, and DC faults for worry-free driving.
- • **Plug & Play Versatility:** High-level input connections and adapter harness simplify installation—no RCA? No problem.

## Overview

The Skar Audio SK-M4004D is a compact yet powerful Class D 4-channel car amplifier delivering up to 400W total output. Engineered with a high-speed MOSFET power supply and advanced crossover controls, it offers versatile sound customization and reliable performance in tight spaces. Featuring high-level inputs and robust 4-way protection circuitry, this amp ensures easy installation and long-lasting durability for audiophiles who demand premium sound on the go.

## Description

The Skar Audio SK-M4004D is an ultra compact, "mini", Class D full-range, four channel car speaker amplifier. The SK-M4004D was engineered to be compact, but provide the power and reliability expected out of larger amplifiers. Featuring a high speed MOSFET power supply, and an efficient Class D design, this amplifier is powerful, reliable, and extremely versatile. The SK-M4004D makes for a great amplifier in applications where space is limited but power cannot be sacrificed. In addition, this four channel amplifier features high level input connections for those installations that lack an RCA connection. In addition to the high level inputs, this amplifier also utilizes an adapter harness for the speaker outputs allowing for an easier and cleaner installation. Further adding to the feature rich list of this amplifier are its high pass / full-range / and low pass user controls, as well as having 4-Way Protection Circuitry Built-in (Thermal, Voltage, Speaker, DC). Utilizes 8 Gauge Power and Ground Input Terminals. Amplifier's dimensions: 7.9in x 4.6in x 1.7in (L x W x H). Frequency Response: 10Hz - 40kHz.

Review: Small and powerful 5 channel amp - Pleasantly surprised with this amp. This amp replaces my old 4 channel amp and mono sub amp. It is running my 6x9 front door speakers and 6.5 rear door speakers along with a 10” pioneer subwoofer. This amp is a bargain for what it’s capable of doing. The sound is nice and the build quality looks great. I would buy this amp again.
Review: Powerful, Clean, and Compact 🔥 - This Skar Audio SK-M4004D amp is a beast in a small package — delivers crisp, distortion-free sound and plenty of power for all four channels. It runs cool, fits anywhere, and really wakes up your speakers. Perfect mix of size, strength, and quality. 💪

## Features

- Ultra Compact MOSFET Full-Range 4-Channel Class D Car Amplifier
- RMS Power @ 2 Ohms: 140 Watts x 4 Channels (14.4v)
- RMS Power @ 4 Ohms: 100 Watts x 4 Channels (14.4v)
- Crossover Controls: HPF / Full-Range / LPF | Frequency Response: 10Hz - 40kHz
- Hi-Level Input Connections: Yes | 8 Gauge Power and Ground Input Terminals

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01EQX5ORK |
| Best Sellers Rank | #12,440 in Electronics ( See Top 100 in Electronics ) #26 in Car Mono Amplifiers |
| Brand | Skar Audio |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,523) |
| Date First Available | April 25, 2016 |
| Global Trade Identification Number | 00739189979165 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.74 pounds |
| Item dimensions L x W x H | 7.9 x 4.64 x 1.65 inches |
| Item model number | SK-M4004D |
| Manufacturer | Skar Audio |
| Material | Mosfet |
| Maximum Supply Voltage | 14.4 Volts |
| Minimum Supply Voltage | 14 Volts (DC) |
| Mounting Type | Surface Mount |
| Number of Channels | 4 |
| Output Power | 400 Watts |
| Product Dimensions | 7.9 x 4.64 x 1.65 inches |
| UPC | 739189979165 |
| Voltage | 14.4 Volts |
| Warranty | 2 year limited warranty |

## Product Details

- **Item dimensions L x W x H:** 7.9 x 4.64 x 1.65 inches
- **Manufacturer:** Skar Audio
- **Maximum Supply Voltage:** 14.4 Volts
- **Minimum Supply Voltage:** 14 Volts (DC)
- **Voltage:** 14.4 Volts

## Images

![Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Car Amplifier, 400W - Image 1](https://m.media-amazon.com/images/I/61npvuKc0ML.jpg)
![Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Car Amplifier, 400W - Image 2](https://m.media-amazon.com/images/I/5179+jkRbxL.jpg)
![Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Car Amplifier, 400W - Image 3](https://m.media-amazon.com/images/I/61VBhOFwuNL.jpg)
![Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Car Amplifier, 400W - Image 4](https://m.media-amazon.com/images/I/61Drb+xgS5L.jpg)
![Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Car Amplifier, 400W - Image 5](https://m.media-amazon.com/images/I/81EOuSV-14L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Can u run 8  speakers on this?**
A: Yes you can. Two speakers per channel in parallel but make sure that the impedence of each speaker is 4 ohms or more because the minimum impedence that this amp can work in a stable condition is 2 ohms. Also keep in mind that each speaker will get around 100-115 watts.

**Q: Can I use this amp to run my subs and tweets since it a four channel amp**
A: I wouldn't recommend it

**Q: I have ix 8 d2 sub, what amp should I get for it?**
A: You can run a Skar RP 350.1

**Q: Can i hook up tweeters, two front 90w rms and two 45w rms speakers to this?**
A: I have tweeters on mine with 2 6.5s running in HPF.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Small and powerful 5 channel amp
*by J***K on February 2, 2026*

Pleasantly surprised with this amp. This amp replaces my old 4 channel amp and mono sub amp. It is running my 6x9 front door speakers and 6.5 rear door speakers along with a 10” pioneer subwoofer. This amp is a bargain for what it’s capable of doing. The sound is nice and the build quality looks great. I would buy this amp again.

### ⭐⭐⭐⭐⭐ Powerful, Clean, and Compact 🔥
*by D***K on October 14, 2025*

This Skar Audio SK-M4004D amp is a beast in a small package — delivers crisp, distortion-free sound and plenty of power for all four channels. It runs cool, fits anywhere, and really wakes up your speakers. Perfect mix of size, strength, and quality. 💪

### ⭐⭐⭐⭐⭐ I gotta admit this amp is a lot of bang for the buck.
*by N***5 on April 27, 2024*

As someone who has been into car audio for several decades I was very skeptical that this amp would perform for this low of a price. I read reviews and watched YouTube vids of amp dynos and this amp is legit. It puts out more power and sound than my alpine amp I replaced with it and for a fraction of the cost. It’s definitely worth the money and it performs very well. I haven’t had any problems with it so far and it hasn’t shut down from heat or anything either. I’m pretty impressed and I think you will be too. I’m definitely recommending it and if you’re on the fence about it, go for it.

## Frequently Bought Together

- Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Car Amplifier, 400W
- Skar Audio 4 Gauge OFC Complete Amplifier Installation Wiring Kit, SKAR4ANL-OFC
- Skar Audio RP-1200.1D Monoblock Class D MOSFET Amplifier with Remote Subwoofer Level Control, 1200W

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-13*