--- product_id: 6470798 title: "AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified | For Receiver, DVR, PlayStation, Xbox, Computer, Cabinet Cooling" brand: "ac infinity" price: "$68.34" currency: USD in_stock: true category: "Ac Infinity" url: https://www.desertcart.ec/products/6470798-ac-infinity-multifan-s4-quiet-140mm-usb-fan-ul-certified store_origin: EC region: Ecuador --- # 67,000 hrs dual-ball bearing lifespan 57 CFM airflow 18 dBA ultra-quiet AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified | For Receiver, DVR, PlayStation, Xbox, Computer, Cabinet Cooling **Brand:** ac infinity **Price:** $68.34 **Availability:** ✅ In Stock ## Summary > 🆒 Stay cool, stay ahead—quiet power that works as hard as you do. ## 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?** $68.34 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/6470798-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 - • **Flexible Placement:** Lay flat or stand upright to fit your setup seamlessly. - • **Versatile USB Power:** Plug into any USB port on your consoles or AV devices—no extra adapters needed. - • **Whisper-Quiet Cooling:** Keep your gear chill without the noise distraction. - • **Precision Speed Control:** Customize airflow with multi-speed settings for perfect balance. - • **Durable Dual-Ball Bearings:** Engineered for longevity—67,000 hours of reliable performance. ## 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 durable dual-ball bearings rated for 67,000 hours, it offers multi-speed control and versatile USB power compatibility, making it the perfect cooling solution for gaming consoles, AV receivers, and computer cabinets. ## Description desertcart.com: AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified | For Receiver, DVR, PlayStation, Xbox, Computer, Cabinet Cooling : Electronics ## 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 cfm | | Best Sellers Rank | #2 in Computer Case Fans | | Brand Name | AC Infinity | | Compatible Devices | Amplifier | | Cooling Method | Air | | Customer Reviews | 4.7 4.7 out of 5 stars (3,205) | | Global Trade Identification Number | 00854759004365 | | Item Dimensions L x W x H | 1"L x 5.5"W x 5.5"H | | Item Weight | 9.07 g | | Manufacturer | AC Infinity | | Material Type | Rubber | | Maximum Rotational Speed | 2000 rpm | | Model | AI-MPF140A | | Noise Level | 18 db | | Number of Items | 1 | | Part Number | FBA_AI-MPF140A | | Power Connector Type | 4-Pin | | UPC | 854759004365 | | Unit Count | 1 Count | | Voltage | 5 volts | | Wattage | 1.5 watts | ## Product Details - **Brand:** AC Infinity - **Compatible Devices:** Amplifier - **Cooling Method:** Air - **Material:** Rubber - **Maximum Rotational Speed:** 2000 rpm - **Noise Level:** 18 db - **Power Connector Type:** 4-Pin - **Product Dimensions:** 1"L x 5.5"W x 5.5"H - **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/713+w3dU6UL.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/715TZNiNZAL.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/61937PlfmYL.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/71Wzh47qmHL.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/61-6CgQl2iL.jpg) ## Available Options This product comes in different **Size** options. ## 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? ## 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.ec/products/6470798-ac-infinity-multifan-s4-quiet-140mm-usb-fan-ul-certified](https://www.desertcart.ec/products/6470798-ac-infinity-multifan-s4-quiet-140mm-usb-fan-ul-certified) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-08-01*