--- product_id: 746648767 title: "Skar Audio SK-M4004D Compact Full Range Class D 4 Channel Car Amplifier 400W" brand: "skar audio" price: "HK$3859" currency: HKD in_stock: true category: "Skar Audio" url: https://www.desertcart.hk/products/746648767-skar-audio-sk-m4004d-compact-full-range-class-d-4 store_origin: HK region: Hong Kong --- # 400W max power output Ultra-compact 7.9" x 4.6" x 1.7" size Adjustable HPF/Full/LPF crossover Skar Audio SK-M4004D Compact Full Range Class D 4 Channel Car Amplifier 400W **Brand:** skar audio **Price:** HK$3859 **Availability:** ✅ In Stock ## Summary > ⚡ Compact Power, Big Impact — Amplify Your Drive! ## 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?** HK$3859 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/746648767-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:** Compact footprint fits seamlessly under seats or tight spots without sacrificing power. - • **Tailored Sound Control:** User-friendly crossover settings let you customize high pass, full range, or low pass filtering for perfect audio tuning. - • **Plug & Play Versatility:** High-level input and adapter harness simplify installation even without RCA connections—no compromises. - • **Built-In Protection Suite:** 4-way safeguards guard against temperature spikes, voltage surges, speaker faults, and DC issues for peace of mind. - • **Powerhouse in a Mini Frame:** Delivers 140W x 4 channels at 2Ω for crisp, distortion-free sound that wakes up your ride. ## Overview The Skar Audio SK-M4004D is a compact yet powerful Class D 4-channel car amplifier delivering up to 400 watts total output. Featuring a high-speed MOSFET power supply, adjustable crossover controls, and high-level input compatibility, it’s designed for tight spaces without sacrificing sound quality. Built-in protection circuits ensure reliability, making it an ideal upgrade for millennial drivers seeking a sleek, powerful audio boost in their vehicles. ## Description The Skar Audio SK-M4004D is an ultra-compact "mini" Class D full-range 4-channel car speaker amplifier. The SK-M4004D is designed to be compact, but still provides the power and reliability you expect from a larger amplifier. Featuring high-speed MOSFET power and efficient Class D design, this amplifier is powerful, reliable, and extremely versatile. The SK-M4004D is an excellent amplifier for applications where space is limited but does not sacrifice power. In addition, this 4-channel amplifier features a high level of input connection for installations without RCA connections. In addition to the high level input, this amplifier also utilizes an adapter harness for speaker output, making installation easier and cleaner. In addition to the rich list of features of this amplifier, as well as high-pass/full-range and low-pass user control, it has built-in 4-way protection circuits (thermal, voltage, speaker, DC). Uses 8 gauge power terminals and ground inputs Amplifier Dimensions: 7.9" x 4.6" x 1.7" (LxWxH) Frequency response: 10Hz-40kHz ## Features - Super 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 Control: HPF / Full Range / LPF | Frequency Response: 10Hz - 40kHz - High Level Input Connection: Yes | 8 Gauge Power and Ground Input Terminal ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01EQX5ORK | | Amazon Bestseller | #1,091,562 in Automotive ( See Top 100 in Automotive ) #128 in Car Multichannel Amplifiers | | 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 cm | | Item Type Name | Car Amplifier | | Item Weight | 1.7 kg | | Manufacturer | Skar Audio | | Material Type | mosfet | | Maximum Supply Voltage | 14.4 Volts | | Minimum Supply Voltage | 14 Volts (DC) | | Model | SK-M4004D | | Mounting Type | Surface Mount | | Number of Channels | 4 | | Output Power | 400 Watts | | Part Number | SK-M4004D | | UPC | 739189979165 | | Unit Count | 1.0 Count | | Voltage | 14.4 Volts | ## Product Details - **Item dimensions L x W x H:** 20.1 x 11.8 x 4.2 cm - **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) ## 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.hk/products/746648767-skar-audio-sk-m4004d-compact-full-range-class-d-4](https://www.desertcart.hk/products/746648767-skar-audio-sk-m4004d-compact-full-range-class-d-4) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-06-02*