--- product_id: 254325798 title: "AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR Playstation Xbox Computer Cabinet Cooling" brand: "ac infinity" price: "¥9212" currency: JPY in_stock: true reviews_count: 9 category: "Ac Infinity" url: https://www.desertcart.jp/products/254325798-ac-infinity-multifan-s4-quiet-140mm-usb-fan-ul-certified store_origin: JP region: Japan --- # 57 CFM airflow 18 dBA ultra-quiet 67,000 hrs dual-ball bearing lifespan AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR Playstation Xbox Computer Cabinet Cooling **Brand:** ac infinity **Price:** ¥9212 **Availability:** ✅ In Stock ## Summary > 🆒 Stay cool, stay silent, stay ahead. ## Quick Answers - **What is this?** AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR Playstation Xbox Computer Cabinet Cooling by ac infinity - **How much does it cost?** ¥9212 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/254325798-ac-infinity-multifan-s4-quiet-140mm-usb-fan-ul-certified) ## Best For - ac infinity enthusiasts ## Why This Product - Trusted ac infinity brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Customizable Airflow:** Multi-speed controller lets you dial in the perfect balance of airflow and silence. - • **Plug & Play USB Power:** Powered directly from your device’s USB port—no extra adapters needed. - • **Whisper-Quiet Cooling:** Ultra-quiet 18 dBA noise level keeps your workspace distraction-free. - • **Vibration-Free Stability:** Silicone rubber feet absorb vibrations and reduce noise for a smooth, stable operation. - • **Durability Meets Flexibility:** Dual-ball bearings rated for 67,000 hours, designed to stand upright or lay flat. ## Overview The AC Infinity MULTIFAN S4 is a UL-certified, ultra-quiet 140mm USB fan delivering 57 CFM airflow at just 18 dBA noise. Featuring a multi-speed controller and durable dual-ball bearings rated for 67,000 hours, it offers flexible placement and reliable cooling for gaming consoles, AV receivers, routers, and computer cabinets. Powered via USB, it’s designed to reduce vibrations with silicone feet, making it the perfect silent cooling solution for your high-performance electronics. ## Description From the manufacturer MULTIFAN Series Designed to quietly cool Xboxs, Playstations, Rokus, Apple TVs, receivers, modems, routers, DVRs, computers, and other audio video electronics. Key Features Multi-Speed Controller Inline switch enables you to optimize fan speed for various applications. Can be powered through USB ports found behind AV electronics and consoles. Ultra-Quiet Fans Designed to maximize airflow CFM to noise dBA ratio. Dual-ball bearings rated at 67,000 hours allows the fans to be laid flat or stand upright. Quality Approved Contains UL recognized axial fans under #E503903 in 2018 by Underwriter Laboratories. Archived in UL Online Certifications Directory. Silicone Rubber Feet Absorbs noise and surface friction caused by fan vibrations. Unused pieces can be detached to reduce overall height for tight spaces. Review: Silent, fast 3 Speed USB fan - Very silent and Low and Med speeds. Good airflow. Very high quality, well made product. Using this for my AVR located inside a narrow cabinet to improve coolng. USB cable is of sufficient length. Cons: The daisy chain USB female receptacle is exposed and sharp and could have caused scratches on my new AVR, so covered it with a piece of tape. Review: Silent and Effective - I use them to cool my Desk NAS, they are silent, have good airflow and do not vibrate - perfect for my application. ## Features - Ultra-quiet UL-certified USB fan designed to cool various electronics and components. - Features a multi-speed controller to set the fan’s speed to optimal noise and airflow levels. - Dual-ball bearings have a lifespan of 67,000 hours and allows the fans to be laid flat or stand upright. - USB plug can power the fan through USB ports found behind popular AV electronics and game consoles. - Fan Size: 5.5 x 5.5 x 1 in. | Airflow: 57 CFM | Noise: 18 dBA | Bearings: Dual Ball ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00MWH4FL4 | | Air Flow Capacity | 57 Cubic Feet Per Minute | | Best Sellers Rank | #48,889 in Computers ( See Top 100 in Computers ) #398 in Computer Case Fans | | Brand | AC Infinity | | Brand Name | AC Infinity | | Compatible Devices | Amplifier | | Cooling Method | Air | | Cooling method | Air | | Customer Reviews | 4.6 out of 5 stars 2,858 Reviews | | Global Trade Identification Number | 00854759004365 | | Item Dimensions L x W x H | 25L x 140W x 140H millimeters | | Item Weight | 0.02 Pounds | | Manufacturer | AC Infinity | | Material Type | Rubber | | Maximum Rotational Speed | 2000 RPM | | Model | AI-MPF140A | | Noise Level | 18 Decibels | | Number of Items | 1 | | Part Number | FBA_AI-MPF140A | | Power Connector Type | USB | | Power connector type | USB | | Product dimensions | 25L x 140W x 140H millimeters | | UPC | 854759004365 | | Unit Count | 1 Count | | Voltage | 5 Volts | | Wattage | 1.5 watts | ## Product Details - **Brand:** AC Infinity - **Power connector type:** USB - **Product dimensions:** 25L x 140W x 140H millimeters - **Voltage:** 5 Volts - **Wattage:** 1.5 watts ## Images ![AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR Playstation Xbox Computer Cabinet Cooling - Image 1](https://m.media-amazon.com/images/I/61prBJ2QyFL.jpg) ![AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR Playstation Xbox Computer Cabinet Cooling - Image 2](https://m.media-amazon.com/images/I/61ybuv0XHWL.jpg) ![AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR Playstation Xbox Computer Cabinet Cooling - Image 3](https://m.media-amazon.com/images/I/61qt+Y2APaL.jpg) ![AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR Playstation Xbox Computer Cabinet Cooling - Image 4](https://m.media-amazon.com/images/I/71zRFtXlgvL.jpg) ![AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR Playstation Xbox Computer Cabinet Cooling - Image 5](https://m.media-amazon.com/images/I/61aNPrhWKbL.jpg) ## Questions & Answers **Q: What is the rpm on these?** A: I am not sure of the exact rpm. I can tell you that I have 7 of these. 1 80mm, 4 120mm, 2 140 mm. I use them on top of my receiver, under my laptop, router and on my nas. Very quiet while still pushing or pulling a good cfm number. Sorry I do not know the exact rpm speed but if your looking at a home theatre application I think these will work great. If you want cfm and some noise is OK you can probably do better. **Q: How many watts does it consume?** A: With the a/c adapter used, 1.8 watts. Used without the a/c adapter (as usb powered) .80 of a watt. **Q: 14 months ago I purchased 3 140mm units for 24x7 usage; all 3 now fail to spin and just jiggle when plugged in. Anyone else have high failure rate?** A: Out of three 140mm and four 120mm units, that I own and have been running for approximately 24 months... One failure. Sent it back and got a replacement with no issues; blade broke. **Q: I see the power cord has a usb connector on one side. is the cord hard wired to the fan or is there a connector? if a connector what type?** A: It is a full powered USB port? Or does the fan speed switch also affect the power coming out of the USB female attached to the fan? ## Customer Reviews ### ⭐⭐⭐⭐⭐ Silent, fast 3 Speed USB fan *by S***H on 31 August 2024* Very silent and Low and Med speeds. Good airflow. Very high quality, well made product. Using this for my AVR located inside a narrow cabinet to improve coolng. USB cable is of sufficient length. Cons: The daisy chain USB female receptacle is exposed and sharp and could have caused scratches on my new AVR, so covered it with a piece of tape. ### ⭐⭐⭐⭐⭐ Silent and Effective *by G***A on 6 October 2022* I use them to cool my Desk NAS, they are silent, have good airflow and do not vibrate - perfect for my application. ### ⭐⭐⭐⭐⭐ Amazing *by M***R on 25 September 2020* Amazing quality, nil noise, very effective ## Frequently Bought Together - AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling - AC Infinity Turbo Fan Power Adapter, for MULTIFAN Series USB Fans - AC Infinity MULTIFAN S3, Quiet 120mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling --- ## 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/254325798-ac-infinity-multifan-s4-quiet-140mm-usb-fan-ul-certified](https://www.desertcart.jp/products/254325798-ac-infinity-multifan-s4-quiet-140mm-usb-fan-ul-certified) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-06-23*