---
product_id: 223932020
title: "SK-M4004D Compact Full-Range RMS Mosfet 4 Channel Car Amplifier, Class D, 400W"
brand: "skar audio"
price: "$U35829"
currency: UYU
in_stock: true
url: https://www.desertcart.uy/products/223932020-sk-m4004d-compact-full-range-rms-mosfet-4-channel-car
store_origin: UY
region: Uruguay
---

# 400W max power output Ultra-compact 7.9in x 4.6in x 1.7in Adjustable HPF/LPF/Full-Range crossover SK-M4004D Compact Full-Range RMS Mosfet 4 Channel Car Amplifier, Class D, 400W

**Brand:** skar audio
**Price:** $U35829
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** SK-M4004D Compact Full-Range RMS Mosfet 4 Channel Car Amplifier, Class D, 400W by skar audio
- **How much does it cost?** $U35829 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/223932020-sk-m4004d-compact-full-range-rms-mosfet-4-channel-car)

## 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

- • **Built to Last:** 4-way protection circuitry guards against thermal, voltage, speaker, and DC faults for worry-free drives.
- • **Space-Savvy Design:** Ultra-compact footprint fits seamlessly into tight car interiors without compromise.
- • **Power Meets Precision:** Delivers 140W RMS x 4 channels at 2Ω for crystal-clear, room-filling sound.
- • **Tailored Audio Control:** Customizable crossover settings let you fine-tune highs, mids, and lows effortlessly.
- • **Plug & Play Versatility:** High-level inputs 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 max output with 140W RMS per channel at 2 ohms. Engineered for tight spaces, it features adjustable crossover controls (HPF, LPF, full-range), high-level input compatibility, and robust 4-way protection circuitry, making it a reliable and versatile upgrade for any car audio enthusiast seeking premium sound without bulk.

## 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.

## 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 |
|---------------|-------|
| Item dimensions L x W x H | 20.1 x 11.8 x 4.2 Centimeters |
| Voltage | 14.4 Volts |
| Manufacturer | Skar Audio |
| Maximum Supply Voltage | 14.4 Volts |
| Minimum Supply Voltage | 14.4 Volts |
| Mounting Type | Surface Mount |
| Brand | Skar Audio |
| Number of Channels | 4 |
| Output Power | 134 Watts |
| Specification Met | CE |
| Global Trade Identification Number | 00739189979165 |
| UPC | 739189979165 |
| Model number | SK-M4004D |
| Number of Memory Sticks | 1 |
| Item Weight | 1 kg 700 g |
| Product Dimensions | 20.07 x 11.79 x 4.19 cm; 1.7 kg |
| Item model number | SK-M4004D |
| Item Height | 1.65 Inches |
| Item Width | 4.64 Inches |
| Connectivity Technology | RCA |
| Output Wattage | 400 Watts |
| Power Source | corded electric |
| Compatible Device | Amplifiers |
| Included Components | Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Amplifier |
| Are batteries included? | No |

## Product Details

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

## Images

![SK-M4004D Compact Full-Range RMS Mosfet 4 Channel Car Amplifier, Class D, 400W - Image 1](https://m.media-amazon.com/images/I/61npvuKc0ML.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.

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.uy/products/223932020-sk-m4004d-compact-full-range-rms-mosfet-4-channel-car](https://www.desertcart.uy/products/223932020-sk-m4004d-compact-full-range-rms-mosfet-4-channel-car)

---

*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-01-23*