--- product_id: 348218449 title: "47KEY2004 Car Audio Smart DSP 4 Channel Speaker Amplifier 40 Band EQ Amp" brand: "kicker" price: "¥84292" currency: JPY in_stock: true reviews_count: 5 category: "Kicker" url: https://www.desertcart.jp/products/348218449-47key2004-car-audio-smart-dsp-4-channel-speaker-amplifier-40 store_origin: JP region: Japan --- # Auto EQ mic for instant calibration 200W total power (50Wx4 channels) 40-band EQ for precise tuning 47KEY2004 Car Audio Smart DSP 4 Channel Speaker Amplifier 40 Band EQ Amp **Brand:** kicker **Price:** ¥84292 **Availability:** ✅ In Stock ## Summary > 🎶 Elevate your drive with smart sound mastery—because your car deserves a concert hall vibe. ## Quick Answers - **What is this?** 47KEY2004 Car Audio Smart DSP 4 Channel Speaker Amplifier 40 Band EQ Amp by kicker - **How much does it cost?** ¥84292 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/348218449-47key2004-car-audio-smart-dsp-4-channel-speaker-amplifier-40) ## 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 - • **Tailored Tonality:** Massive 40-band equalizer and 24dB crossovers redefine speaker performance. - • **Compact Powerhouse:** Sleek, under-8-inch design fits discreetly anywhere in your car. - • **Plug & Play Precision:** One-button mic calibration delivers perfect soundstage and clarity every time. - • **Start-Stop System Compatible:** Seamlessly works with modern vehicles’ eco-friendly start-stop tech. - • **Concert-Quality Sound, Instantly:** AI-driven DSP auto-tunes your factory speakers in minutes—no pro needed. ## Overview The KICKER 47KEY2004 is a compact 4-channel smart amplifier with AI-powered DSP, delivering 200 watts of clean power and a 40-band equalizer for precise sound tuning. Featuring an auto-calibration microphone and compatibility with start-stop vehicle systems, it transforms factory stereos into immersive concert-quality audio setups in minutes. ## Description Kicker 47KEY2004 KEY 4-Channel DSP Smart Amplifier, 4x50W The biggest advance - in the smallest package. Introducing the KEY smart amplifier and audio processor in one, featuring AI-driven DSP. Press the selector, and the microphone goes to work. The KEY uses a powerful internal computer to deliver dramatic improvements in realism and soundstage. A massive 40-band equalizer improves tonality, and a 24dB crossover re-defines the capabilities of each speaker. The concert quality of your factory stereo is revealed! What would take hours for a professional to achieve happens in a matter of minutes. All automatically. All with the press of a single button. POWERHOUSE - In addition to an unbelievable sound quality, the KEY200.4 delivers 200 watts of pumpin’ power to your factory speakers. At KICKER, we know power and clarity always go hand-in-hand. HIDDEN TREASURE - Measuring less than eight inches long and only two inches high, the KEY200.4 fits nearly anywhere. Mount it behind your radio, under the seat, or in your trunk with ease. START. DON’T STOP. - The KEY200.4 is one of the first amps fully compatible with newer vehicles using start-stop systems. Features - 200 Watts Of Power (50x4) Auto EQ Microphone With Selector Switch Included Compatible with Start/Stop Vehicle Technology FIT2 Technology Included Turn On Via Remote 12v Signal Or DC Offset Auto 40-Band Equalizer Bi-Amp Capability (Defeatable) Auto Compressor (Defeatable) Kicker EQ Preset (Defeatable) Auto Time Alignment (Defeatable) Auto Level Adjustment (Bi-Amp Mode Only) Auto Speaker Size Detection 24dB Crossovers 60/80/120hz High Pass Filter (Defeatable) Review: Great enhancement for poor stock speakers - I used this product to augment an old Mercedes’ 1970’s Becker stereo. I like my old stock head unit because it’s stylish, matches the old classic car and was quality back in its day. Today though… it’s poor sound quality. Ancient paper cone speakers, 4inch in front, 5inch in rear. I inserted the kicker key 200.4 into the system to work it’s electronic magic trickery. Once installed, I used the self-tuning system with the supplied microphone. The results are staggering. Somehow my ancient tiny speakers have acceptably good clarity and even acceptable levels of bass. They are all matched in volume, and the sound stage sounds like it’s right between my ears when sat in drivers seat. Superb product for lifting an worn out old stock system into the present day. Impressed with kicker yet again. Have ordered a set of their entry level speakers now as a follow up from these excellent results. Just a word of warning though… in old cars with earthed negative returns on the speakers, you will need to wire both negative and positive from/to the speakers and cannot earth the speaker inputs to ground. Because It’s a class D amp. (Same with any class D amps, not just kicker). Enjoy. There is also just a whisper of white noise from the amp when powered up, but no music playing. This needs to be improved for future models Kicker! Review: The sound quality improvement is great! - When it arrived it was smaller than I expected which made installing it behind the dash on the passenger side possible (2021 Corolla) I installed this after installing some Focal speakers and the improvement in the sound is great after the auto calibration! ## Features - Don’t just make your system louder - make it clearer Make it better - Press the selector and the microphone goes to work The KEY uses a powerful internal computer to deliver dramatic improvements in realism and soundstage - A massive 40-band equalizer improves tonality and a 24dB crossover re-defines the capabilities of each speaker - The concert quality of your factory stereo is revealed! What would take hours for a professional to achieve happens in a matter of minutes ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B084HLVFFK | | Best Sellers Rank | #114,597 in Electronics ( See Top 100 in Electronics ) #29 in Car Audio & Video Amplifier Equalizers | | Brand Name | KICKER | | Customer Reviews | 4.6 out of 5 stars 192 Reviews | | Global Trade Identification Number | 00713034013174 | | Included Components | 47KEY2004 | | Item Dimensions | 27.3 x 21.6 x 7 centimeters | | Item Weight | 998 g | | Item dimensions L x W x H | 27.3 x 21.6 x 7 centimeters | | Manufacturer | KICKER | | Material Type | Electronics, metal | | Maximum Supply Voltage | 12 Volts | | Maximum supply voltage | 12 Volts | | Minimum Supply Voltage | 12 Volts (DC) | | Minimum supply voltage | 12 Volts (DC) | | Model | 47KEY2004 | | Mounting Type | Surface Mount | | Mounting type | Surface Mount | | Number of Channels | 4 | | Output Power | 200 Watts | | Package Type Name | Standard packaging | | Part Number | 47KEY2004 | | Specification Met | FCC | | UPC | 713034013174 | | Unit Count | 1.0 Count | | Voltage | 12 Volts | ## Product Details - **Item dimensions L x W x H:** 27.3 x 21.6 x 7 centimeters - **Manufacturer:** KICKER - **Maximum supply voltage:** 12 Volts - **Minimum supply voltage:** 12 Volts (DC) - **Voltage:** 12 Volts ## Images ![47KEY2004 Car Audio Smart DSP 4 Channel Speaker Amplifier 40 Band EQ Amp - Image 1](https://m.media-amazon.com/images/I/61w1RT4RLlL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ Great enhancement for poor stock speakers *by O***T on 11 July 2022* I used this product to augment an old Mercedes’ 1970’s Becker stereo. I like my old stock head unit because it’s stylish, matches the old classic car and was quality back in its day. Today though… it’s poor sound quality. Ancient paper cone speakers, 4inch in front, 5inch in rear. I inserted the kicker key 200.4 into the system to work it’s electronic magic trickery. Once installed, I used the self-tuning system with the supplied microphone. The results are staggering. Somehow my ancient tiny speakers have acceptably good clarity and even acceptable levels of bass. They are all matched in volume, and the sound stage sounds like it’s right between my ears when sat in drivers seat. Superb product for lifting an worn out old stock system into the present day. Impressed with kicker yet again. Have ordered a set of their entry level speakers now as a follow up from these excellent results. Just a word of warning though… in old cars with earthed negative returns on the speakers, you will need to wire both negative and positive from/to the speakers and cannot earth the speaker inputs to ground. Because It’s a class D amp. (Same with any class D amps, not just kicker). Enjoy. There is also just a whisper of white noise from the amp when powered up, but no music playing. This needs to be improved for future models Kicker! ### ⭐⭐⭐⭐⭐ The sound quality improvement is great! *by C***Y on 11 November 2022* When it arrived it was smaller than I expected which made installing it behind the dash on the passenger side possible (2021 Corolla) I installed this after installing some Focal speakers and the improvement in the sound is great after the auto calibration! ### ⭐⭐⭐⭐⭐ Powerful and accurate sound. *by M***R on 16 February 2026* This DSP and amp is amazing! It gives a huge new dimension to your music. It's pretty small, and it's light, so it can fit in a lot of locations. It's very powerful. You won't need another more powerful amp on the side as well. I can only turn up my volume about 1/3 of the way before it gets unsafe (90dB) to listen to. The color coded wires are helpful and easy to follow. ## 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.jp/products/348218449-47key2004-car-audio-smart-dsp-4-channel-speaker-amplifier-40](https://www.desertcart.jp/products/348218449-47key2004-car-audio-smart-dsp-4-channel-speaker-amplifier-40) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-06-18*