---
product_id: 254582125
title: "Skar Audio A U D I O Compact Full-Range Rms Mosfet 4 Channel Car Amplifier (SK-M4004D,400W)"
brand: "skar audio"
price: "€ 396.85"
currency: EUR
in_stock: true
reviews_count: 5
category: "Skar Audio"
url: https://www.desertcart.at/products/254582125-skar-audio-a-u-d-i-o-compact-full-range
store_origin: AT
region: Austria
---

# 400W max output power Ultra compact 20.1x11.8x4.2 cm Adjustable HPF/LPF crossover controls Skar Audio A U D I O Compact Full-Range Rms Mosfet 4 Channel Car Amplifier (SK-M4004D,400W)

**Brand:** skar audio
**Price:** € 396.85
**Availability:** ✅ In Stock

## Summary

> 🎵 Compact Powerhouse: Big Sound, Small Package, Zero Compromise!

## Quick Answers

- **What is this?** Skar Audio A U D I O Compact Full-Range Rms Mosfet 4 Channel Car Amplifier (SK-M4004D,400W) by skar audio
- **How much does it cost?** € 396.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/254582125-skar-audio-a-u-d-i-o-compact-full-range)

## 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 any car interior without compromise.
- • **Power Meets Precision:** Delivers 140W RMS x4 channels at 2Ω for crystal-clear, distortion-free sound.
- • **Effortless Installation:** High-level inputs and adapter harness simplify setup, even without RCA connections.
- • **Versatile Sound Control:** Customizable crossover settings (HPF/Full/LPF) tailor your audio experience perfectly.
- • **Cool & Reliable Performance:** Efficient Class D MOSFET design ensures powerful output while running cool and stable.

## Overview

The Skar Audio SK-M4004D is a compact yet powerful 4-channel Class D car amplifier delivering up to 400 watts max output. Engineered with a high-speed MOSFET power supply and adjustable crossover controls, it offers versatile, distortion-free sound tailored for space-conscious installations. Its user-friendly design includes high-level inputs and an adapter harness for easy setup, making it the perfect upgrade for millennial professionals seeking premium audio performance without bulk.

## Description

The skar audio SK-M4004D full range class d four channel amplifier is part of the new mini amplifier series product lineup from skar audio. 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 installation.

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. 💪
Review: Quality of sound good quality of product not so good - Sounds quality good power and ground screws sets backoff causing powerless only thing haven't tried is lock locktite in theads to prevent blackout of set screw

## Features

- Ultra Compact MOSFET Full-Range 4-Channel Class D Car Amplifier
- RMS Power at 2 Ohms: 140 Watts x 4 Channels (14.4v)
- RMS Power at 4Ohms: 100 Watts x 4 Channels (14.4v)
- Crossover Controls: HPF / Full-Range / LPF | Frequency Response: 10Hz - 40kHz

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01EQX5ORK |
| Brand Name | Skar Audio |
| Customer Reviews | 4.2 out of 5 stars 452 Reviews |
| Global Trade Identification Number | 00739189979165 |
| Included Components | Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Amplifier |
| Item Dimensions | 20.1 x 11.8 x 4.2 centimeters |
| Item Type Name | Car Amplifier |
| Item Weight | 3.74 Pounds |
| Item dimensions L x W x H | 20.1 x 11.8 x 4.2 centimeters |
| Manufacturer | Skar Audio |
| Material Type | Mosfet |
| Maximum Output Power | 400 watts |
| Maximum Supply Voltage | 14.4 Volts |
| Maximum supply voltage | 14.4 Volts |
| Minimum Supply Voltage | 14.4 Volts |
| Minimum supply voltage | 14.4 Volts |
| Model | SK-M4004D |
| Mounting Type | Surface Mount |
| Mounting type | Surface Mount |
| Number of Channels | 4 |
| Output Power | 400 Watts |
| Part Number | SK-M4004D |
| Specification Met | CE |
| UPC | 739189979165 |
| Unit Count | 1 Count |
| Voltage | 14.4 Volts |

## Product Details

- **Item dimensions L x W x H:** 20.1 x 11.8 x 4.2 centimeters
- **Manufacturer:** Skar Audio
- **Maximum supply voltage:** 14.4 Volts
- **Minimum supply voltage:** 14.4 Volts
- **Voltage:** 14.4 Volts

## Images

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

## 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

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

### ⭐⭐⭐ Quality of sound good quality of product not so good
*by C***. on 9 August 2025*

Sounds quality good power and ground screws sets backoff causing powerless only thing haven't tried is lock locktite in theads to prevent blackout of set screw

### ⭐⭐⭐⭐⭐ Don't need subs with one of these and a good set of speakers.
*by Q***N on 16 April 2021*

This amp gave my system just what it needed. I was running brand new cerwin vega speakers directly off my new Android deck via wiring harness and stock speaker wires and it just sounded flat and week. I got this amp and some 16ga speaker wire and rewired the whole car and now it sounds so rich, warm, and powerful. With the eq set to hip hop and the bass boat turned on, you probably don't need a subwoofer. I have a sub in my car and it was overpowering my speakers. This amp does a great job compensating for the bass. It made all the difference in creating a rich full sound and making one of the best sounding car stereos I've ever heard. 10/10 would recommend.

## 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 Austria*
*Store origin: AT*
*Last updated: 2026-07-24*