--- product_id: 512203218 title: "Rockville RFC50F v2 50 Farad Car Audio Capacitor w/Blue Voltage Display" brand: "rockville" price: "¥42385" currency: JPY in_stock: true reviews_count: 5 category: "Rockville" url: https://www.desertcart.jp/products/512203218-rockville-rfc50f-v2-50-farad-car-audio-capacitor-w-blue store_origin: JP region: Japan --- # 50 Farad high-capacity power surge Heavy-duty bolt-down platinum terminals Blue LED voltage display with beat-sync Rockville RFC50F v2 50 Farad Car Audio Capacitor w/Blue Voltage Display **Brand:** rockville **Price:** ¥42385 **Availability:** ✅ In Stock ## Summary > 🔊 Rock the Road with Power & Precision – Your Sound System’s Secret Weapon! ## Quick Answers - **What is this?** Rockville RFC50F v2 50 Farad Car Audio Capacitor w/Blue Voltage Display by rockville - **How much does it cost?** ¥42385 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/512203218-rockville-rfc50f-v2-50-farad-car-audio-capacitor-w-blue) ## Best For - rockville enthusiasts ## Why This Product - Trusted rockville brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Safety Alerts:** Integrated IC-controlled alarms warn you of dangerous voltage spikes or drops, protecting your gear 24/7. - • **Visual Voltage Mastery:** Super bright 3-digit blue LED display shows real-time voltage with ±0.1V accuracy, syncing to your music’s rhythm. - • **Built to Last & Connect:** Durable aluminum-plastic body with platinum-plated bolt-down terminals ensures rock-solid, corrosion-free connections. - • **Power Your Bass Like a Pro:** 50 Farad capacity delivers instant power bursts to keep your system booming without dimming your lights. - • **Energy-Efficient Sleep Mode:** Automatic sleep feature conserves power during low volume, optimizing performance and battery life. ## Overview The Rockville RFC50F v2 is a professional-grade 50 Farad car audio capacitor featuring a unique blue LED voltage display that pulses to your music. Engineered with a low 0.015 ohm ESR and platinum-plated bolt-down terminals, it delivers reliable power surges up to 20V to stabilize your vehicle’s electrical system during heavy bass hits. Its smart IC circuitry provides real-time voltage monitoring with ±0.1V accuracy and alerts for unsafe voltage levels, while an automatic sleep mode conserves energy during quiet moments. Compact and stylish, this capacitor is a must-have upgrade for serious car audio enthusiasts seeking performance and protection at a competitive price. ## Description Have you noticed your headlights dimming to the beat when you hit those heavy bass notes on your car’s custom sound system? Cranking up the volume on your system can put inordinate amounts of stress on your vehicle’s electrical system. Most cars today cannot handle the high power demands of custom sound system components hence the need for a dependable and powerful capacitor. Enter the Rockville RFC50F Digital Hybrid Capacitor. This professional grade capacitor is built to handle even the most power hungry amplifiers delivering a surge of up to 20 volts of power when needed. Rockville engineers have gone out of their way to design and put in your hands a high end capacitor at half the cost of our competitors similarly spec’d models. The RFC50F features a 3-digit super bright digital LED read out which displays the unit’s exact operating voltage to the decimal point. It comes equipped with heavy-duty bolt-down style platinum plated terminals which ensure a safe and solid connection. The built-in IC Controlled circuitry alerts you if your voltage is too high (+17. 5v) or too low (-10v). An automatic sleep feature helps the capacitor reserve power during lulls in volume levels, delivering it only as needed. With its sleek lines, modern styling and cool blue LED accents, the RFC50F will enhance the look of any sound system. The reasonably priced RFC50F comes with a 90-day money-back . With its high-quality build and superb performance, its a definite step up and a must-have for your car’s sound system Review: Best upgrade to my system - Hear me out... I recently upgraded from 1000 to about 2800 watts running to 2 skar Evl 12s. I wanted to make sure my electrical was perfect, so not only do i have a 2nd battery and a high output alternator, but decided to bite the bullet on this. I didnt believe it would make a difference, but I really felt mt electrical needed a bit more umph. This is single handedly the best upgrade I have ever made to any system. It hold my voltage at idle at 13.4v or higher, even at full bass. No more dimming lights, no more rpm drops...NOTHING. It helped so much, it made me a believer of capacitors. Mind you, I have an XS Power battery up front AND in back, and I would say the capacitor did more than the batteries did as far as keeping voltage up. A few notes: Do the initial charge with the resistor and dont panic if it doesnt start right away. When it does start, youll hear a horrid low voltage alarm, dont panic, this is normal. My voltage on the cap stopped at 8.7v with the resistor, and I decided to hook it up without it (this was about 10 minutes later). Just dont be alarmed when it takes longer than you expect. If youre on the fence, take it from a bass nerd like myself, for $110, you wont regret a single thing about it. Review: Great - Love the power from it ## Features - Rockville RFC50F 50 Farad Capacitor Blue Voltage Display. ESR (Equivalent Series Resistance): 0. 015 ohm @ 120Hz, 25°C. 50 Farad Digital Hybrid Capacitor with Blue Illumination - Blue illuminated window with light that blinks to the beat of the music. Black wire mesh cover. Warning tones for reverse polarity connection - 3-Digit, super bright LED voltage meter. Automatic sleep status when volume is low. Operating Voltage: 10 - 16V DC - Surge Voltage: 20V DC. Voltage measure accurate to +/- 0. 1VDC. Capacitance tolerance: +/- 10% - Over-voltage protection circuit automatically alarms when the voltage above 17. 5V or under 10V. Unit dimensions (Inches): 10. 91” L x 6. 38” W x 2. 56” H. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08298MNJC | | Best Sellers Rank | #77,450 in Electronics ( See Top 100 in Electronics ) #33 in Car Amplifier Capacitors | | Brand | Rockville | | Brand Name | Rockville | | Capacitance | 50 Farad | | Capacitance Tolerance | 10 | | Customer Reviews | 4.2 out of 5 stars 313 Reviews | | Equivalent Series Resistance | 0.02 Ohms | | Equivalent series resistance | 0.02 Ohms | | Global Trade Identification Number | 00819216023990 | | Included Components | 1 | | Item Dimensions W x H | 16.2W x 6.5H centimeters | | Item Highlight | Digital Hybrid, Illumination, 3-Digit LED Meter, 20V Surge, Reverse Polarity Warning, Auto Sleep, Low ESR | | Item Shape | Round | | Item Type Name | Rockville RFC50F v2 50 Farad Car Audio Capacitor w/Blue Voltage Display | | Manufacturer | Rockville | | Material | Aluminum Plastic | | Material Type | Aluminum Plastic | | Maximum Voltage | 50 Volts | | Model | RFC50F v2 | | Mounting Type | Bolt-Down Mount | | Number of Items | 1 | | Number of Packs | 1 | | Operating Voltage | 50 Volts | | Operating voltage | 50 Volts | | Part Number | RFC50F v2 | | Shape | Round | | UPC | 819216023990 | | Unit Count | 1 Count | | Upper Temperature Rating | 85 Degrees Celsius | ## Product Details - **Brand:** Rockville - **Capacitance:** 50 Farad - **Equivalent series resistance:** 0.02 Ohms - **Material:** Aluminum Plastic - **Shape:** Round ## Images ![Rockville RFC50F v2 50 Farad Car Audio Capacitor w/Blue Voltage Display - Image 1](https://m.media-amazon.com/images/I/81lvYWqIJDL.jpg) ![Rockville RFC50F v2 50 Farad Car Audio Capacitor w/Blue Voltage Display - Image 2](https://m.media-amazon.com/images/I/81CCZigsnsL.jpg) ![Rockville RFC50F v2 50 Farad Car Audio Capacitor w/Blue Voltage Display - Image 3](https://m.media-amazon.com/images/I/81UFwCKrhwL.jpg) ![Rockville RFC50F v2 50 Farad Car Audio Capacitor w/Blue Voltage Display - Image 4](https://m.media-amazon.com/images/I/81D8zsrDbOL.jpg) ![Rockville RFC50F v2 50 Farad Car Audio Capacitor w/Blue Voltage Display - Image 5](https://m.media-amazon.com/images/I/71Ix06WhHdL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Can you turn turn off the blue lights?** A: I haven't tried to but if you take it apart you probably can. My suggestion If you dont like the flashing lights just use electrical tape to cover it. **Q: The top says 30 Farad then down below says 50 Farad for $79.95 which is it?** A: You can choose they have 2 option either pay $74.95 for a 30 farad or $79.95 for a 50 farad. I brought the 30 farad because that’s what they have had all this time but it’s seems that they come out with a newer one **Q: There's no buy button?!?!** A: Then it’s out of order **Q: Going to try this question again "The top says 30 Farad then down below says 50 Farad for $79.95 which is it?"** A: I'm not sure because I've had mine almost 2 years now and I dont look at it that frequently ## Customer Reviews ### ⭐⭐⭐⭐⭐ Best upgrade to my system *by S***R on 3 March 2026* Hear me out... I recently upgraded from 1000 to about 2800 watts running to 2 skar Evl 12s. I wanted to make sure my electrical was perfect, so not only do i have a 2nd battery and a high output alternator, but decided to bite the bullet on this. I didnt believe it would make a difference, but I really felt mt electrical needed a bit more umph. This is single handedly the best upgrade I have ever made to any system. It hold my voltage at idle at 13.4v or higher, even at full bass. No more dimming lights, no more rpm drops...NOTHING. It helped so much, it made me a believer of capacitors. Mind you, I have an XS Power battery up front AND in back, and I would say the capacitor did more than the batteries did as far as keeping voltage up. A few notes: Do the initial charge with the resistor and dont panic if it doesnt start right away. When it does start, youll hear a horrid low voltage alarm, dont panic, this is normal. My voltage on the cap stopped at 8.7v with the resistor, and I decided to hook it up without it (this was about 10 minutes later). Just dont be alarmed when it takes longer than you expect. If youre on the fence, take it from a bass nerd like myself, for $110, you wont regret a single thing about it. ### ⭐⭐⭐⭐⭐ Great *by S***A on 11 November 2024* Love the power from it ### ⭐⭐⭐⭐⭐ Must have *by L***D on 2 October 2025* Great product, it helps and works really great ## Frequently Bought Together - Rockville RFC50F v2 50 Farad Car Audio Capacitor w/Blue Voltage Display - Tottist 4PCS Heavy-Duty Car Stereo Audio Wire Reducer - 0 Gauge to 4 Gauge for Amp Input, AWG Pin Power & Ground Connection - TKDMR 10pcs 1/0 AWG-3/8 Battery Lugs,Heavy Duty Wire Lugs,Ring Terminals,Battery Cable Ends,0 Guage terminals,Battery Terminal Connectors with 10pcs 3:1 Heat Shrink Tubing --- ## 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/512203218-rockville-rfc50f-v2-50-farad-car-audio-capacitor-w-blue](https://www.desertcart.jp/products/512203218-rockville-rfc50f-v2-50-farad-car-audio-capacitor-w-blue) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-11-10*