--- product_id: 196969740 title: "Kicker KEY2004 (47KEY200.4) 4-Channel Smart Amplifier" brand: "kicker" price: "$651.90" currency: USD in_stock: true reviews_count: 13 category: "Kicker" url: https://www.desertcart.us/products/196969740-kicker-key2004-47key200-4-4-channel-smart-amplifier store_origin: US region: United States of America --- # Built-in mic for auto tuning 4x50W output power 40-band equalizer Kicker KEY2004 (47KEY200.4) 4-Channel Smart Amplifier **Brand:** kicker **Price:** $651.90 **Availability:** ✅ In Stock ## Summary > 🎶 Elevate your ride’s soundtrack—hear what you’ve been missing! ## Quick Answers - **What is this?** Kicker KEY2004 (47KEY200.4) 4-Channel Smart Amplifier by kicker - **How much does it cost?** $651.90 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/196969740-kicker-key2004-47key200-4-4-channel-smart-amplifier) ## Best For - kicker enthusiasts ## Why This Product - Trusted kicker brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision 40-Band EQ:** Customize every frequency with a massive 40-band equalizer for unmatched tonal control. - • **Smart Mic Auto-Tuning:** Instantly optimize your soundstage with the built-in microphone and powerful DSP—no pro needed. - • **Compact & DIY Friendly:** Lightweight, small footprint design fits anywhere and makes installation a breeze. - • **Concert-Quality Clarity:** Transform your factory stereo into a live concert experience with crystal-clear sound. - • **Powerful 4-Channel Output:** Deliver 200 watts total power (4x50W) to energize your entire vehicle audio system. ## Overview The Kicker 47KEY2004 is a compact 4-channel DSP smart amplifier delivering 4x50W of powerful, crystal-clear sound. Featuring a built-in microphone for automatic tuning, a 40-band equalizer, and a 24dB crossover, it transforms factory stereos into concert-quality audio systems with professional-grade precision—all in a DIY-friendly package. ## Description Product description Kicker KEY Technology Amplifiers Let KEY professionally tune your system – just sit back and enjoy the music. A Better Sound. Automatically. The KEY200.4 Smart Amplifier uses AI-driven DSP to quickly optimize your sound. Press one button for dramatically improved audio. Little Amp. Big Difference. Measuring under 8 inches long and just 2 inches high, KEY amps fit almost anywhere—behind the radio, under a seat, or in the trunk. Ready for Your Ride KEY amplifiers work with nearly all stock and aftermarket radios, including newer vehicles equipped with start-stop systems. Packed With Power KEY Smart Amps deliver powerful sound with up to 500W RMS for subs and 50W per channel for speakers—everything you need to rock your ride. KEY500.1 Smart Mono Amp (bass revealer/processor) This compact mono amplifier delivers 500W at 1 ohm, 300W at 2 ohms, and 150W at 4 ohms. Slim 1-11/16" height fits tight installs, with 10–160Hz response, variable LP/HP crossovers, >90dB S/N ratio, and high- or low-level input compatibility. KEY200.4 Smart 4-Ch. Amplifier (auto-EQ/processor) This compact 4-channel amplifier delivers 50W x4 at 4 ohms and includes a microphone with Kicker EQ button for easy tuning. Slim 1-11/16" height fits tight spaces, with 20–20kHz response, selectable active crossovers, high-level inputs, and >90dB signal-to-noise ratio. Kicker KEYLOC Smart Line-Out Converter This revolutionary, DSP (digital signal processor)-controlled, line-output converter automatically detects the frequency response and phase of your factory stereo system, and then allows you to integrate into a more fun, modern entertainment setup! ## Features - 4-channel Smart Amplifier - 4 ohms: 50 watts x 4 chan - Max power output: 400 watts - Auto EQ Microphone With Selector Switch Included - Compatible with Start/Stop Vehicle Technology ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B084HLVFFK | | Best Sellers Rank | #30,004 in Electronics ( See Top 100 in Electronics ) #58 in Car Multichannel Amplifiers | | Brand | KICKER | | Brand Name | KICKER | | Customer Reviews | 4.6 out of 5 stars 200 Reviews | | Global Trade Identification Number | 00713034013174 | | Included Components | 47KEY2004 | | Item Dimensions | 10 x 12 x 9 inches | | Item Weight | 2.2 Pounds | | Item dimensions L x W x H | 10 x 12 x 9 inches | | Manufacturer | Kicker | | Maximum Supply Voltage | 12 Volts | | Model | KEY2004 (47KEY200.4) | | Mounting Type | Surface Mount | | Number of Channels | 4 | | Output Power | 200 Watts | | Part Number | 47KEY2004 | | Specification Met | FCC | | UPC | 713034013174 | | Unit Count | 1.0 Count | | Voltage | 12 Volts | | Warranty Description | We warrant that your new purchased item is free from defects and will function to its full specifications under normal use for a period of 1 year from the original invoice shipping date. | ## Product Details - **Item dimensions L x W x H:** 10.75 x 8.5 x 2.75 inches - **Manufacturer:** Kicker - **Maximum Supply Voltage:** 12 Volts - **Mounting Type:** Surface Mount - **Voltage:** 12 Volts ## Images ![Kicker KEY2004 (47KEY200.4) 4-Channel Smart Amplifier - Image 1](https://m.media-amazon.com/images/I/61w1RT4RLlL.jpg) ![Kicker KEY2004 (47KEY200.4) 4-Channel Smart Amplifier - Image 2](https://m.media-amazon.com/images/I/71WbeVrAAoL.jpg) ![Kicker KEY2004 (47KEY200.4) 4-Channel Smart Amplifier - Image 3](https://m.media-amazon.com/images/I/713Rx7U8Z-L.jpg) ![Kicker KEY2004 (47KEY200.4) 4-Channel Smart Amplifier - Image 4](https://m.media-amazon.com/images/I/71mjSp9kpFL.jpg) ![Kicker KEY2004 (47KEY200.4) 4-Channel Smart Amplifier - Image 5](https://m.media-amazon.com/images/I/71AM4LOkh0L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by M***R on February 16, 2026* ### ⭐⭐⭐⭐⭐ Review *by C***Y on March 20, 2023* ### ⭐⭐⭐⭐⭐ Review *by P***N on March 15, 2026* ## Frequently Bought Together - Kicker 47KEY2004 Car Audio Smart DSP 4 Channel Speaker Amplifier 40 Band EQ Amp - Scosche Install Centric ICAK12 True 12 Gauge Hybrid OFC 2-Channel High Current Amplifier Wiring Kit Accessory Installation Wiring Kit for Boat, Motorcycles, ATV’s and UTV’s - RED WOLF Car Radio Add Amplifier Subwoofer T-Harness Adapter Connector Compatible with Toyota 2018-2023 Camry, 2019-2023 Tacoma RAV4 Corolla Non JBL System Plug and Play --- ## 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.us/products/196969740-kicker-key2004-47key200-4-4-channel-smart-amplifier](https://www.desertcart.us/products/196969740-kicker-key2004-47key200-4-4-channel-smart-amplifier) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-07*