--- product_id: 254582125 title: "A U D I O Compact Full-Range Rms Mosfet 4 Channel Car Amplifier (SK-M4004D,400W)" brand: "skar audio" price: "£217.00" currency: GBP in_stock: true category: "Skar Audio" url: https://www.desertcart.co.uk/products/254582125-a-u-d-i-o-compact-full-range-rms-mosfet store_origin: GB region: United Kingdom --- # 400W max power output Ultra-compact 20.1x11.8x4.2 cm Adjustable HPF/LPF crossover controls A U D I O Compact Full-Range Rms Mosfet 4 Channel Car Amplifier (SK-M4004D,400W) **Brand:** skar audio **Price:** £217.00 **Availability:** ✅ In Stock ## Summary > 🎵 Compact Powerhouse, Big Sound Impact! ## Quick Answers - **What is this?** 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?** £217.00 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/254582125-a-u-d-i-o-compact-full-range-rms-mosfet) ## 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 interiors without compromise. - • **Efficient MOSFET Tech:** Class D amplifier with high-speed MOSFET power supply ensures reliable, energy-smart performance. - • **Power Meets Precision:** Delivers 140W x 4 channels at 2Ω for crystal-clear, room-filling sound. - • **Versatile Sound Control:** Customize your audio with high/low pass filters and full-range crossover options. - • **Plug & Play Installation:** High-level inputs and adapter harness simplify setup—no RCA? No problem. ## Overview The Skar Audio SK-M4004D is a compact, full-range 4-channel Class D car amplifier delivering up to 400 watts of RMS power. Engineered with a high-speed MOSFET power supply and adjustable crossover controls, it offers versatile sound customization and easy installation, making it the perfect choice for audiophiles who demand powerful performance in limited spaces. ## 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. ## 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 4.2 out of 5 stars (446) | | 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 | 1.7 kg | | Manufacturer | Skar Audio | | Material Type | Mosfet | | Maximum Output Power | 400 watts | | Maximum Supply Voltage | 14.4 Volts | | Minimum Supply Voltage | 14.4 Volts | | Model | SK-M4004D | | 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 ![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) ## 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. ## 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.co.uk/products/254582125-a-u-d-i-o-compact-full-range-rms-mosfet](https://www.desertcart.co.uk/products/254582125-a-u-d-i-o-compact-full-range-rms-mosfet) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-12*