--- product_id: 60827217 title: "AC Infinity MULTIFAN S2, Quiet 120mm USB Blower Fan" brand: "ac infinity" price: "₩61731" currency: KRW in_stock: true reviews_count: 13 category: "Ac Infinity" url: https://www.desertcart.kr/products/60827217-ac-infinity-multifan-s2-quiet-120mm-usb-blower-fan store_origin: KR region: South Korea --- # 35 CFM airflow Ultra-quiet 17 dBA noise USB-powered convenience AC Infinity MULTIFAN S2, Quiet 120mm USB Blower Fan **Brand:** ac infinity **Price:** ₩61731 **Availability:** ✅ In Stock ## Summary > ❄️ Stay cool, stay ahead—because your gear deserves the best breeze. ## Quick Answers - **What is this?** AC Infinity MULTIFAN S2, Quiet 120mm USB Blower Fan by ac infinity - **How much does it cost?** ₩61731 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/60827217-ac-infinity-multifan-s2-quiet-120mm-usb-blower-fan) ## 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 - • **Multi-Speed Control:** Customize fan speed for perfect balance of silence and cooling. - • **Whisper-Quiet Cooling:** Keep your AV gear chill without the noise distraction. - • **Daisy-Chain Capability:** Expand cooling with multiple fans using fewer USB ports. - • **USB-Powered Plug & Play:** Easy setup with any USB port—no extra power adapters needed. - • **Compact Low-Profile Design:** Fits tight spaces with rear exhaust for optimal airflow. ## Overview The AC Infinity MULTIFAN S2 is a compact, USB-powered 120mm blower fan delivering 35 CFM airflow at an ultra-quiet 17 dBA noise level. Designed for tight spaces, it features a low-profile rear exhaust and multi-speed control to optimize cooling for AV electronics and gaming consoles. Its daisy-chain capability and USB plug make it a versatile, easy-to-install solution to extend the lifespan of your valuable equipment. ## Description Buy Review: Great fans that work with a great customer service. - To start of with I done my research after stumbling upon these cooling fans to cool down my AV system consisting of 250W mono block amps a dual processor which runs as hot as the amps as well a Sky box and PS 3&4 that run hot. I still had unanswered questions though so contacted AC Infinity's customer service to determine which type of fans suited my needs best. What can I say the customer service and helpful punctual reply's are second to none and wish all company's had this level of helpfulness & patience with all the questions I kept asking over several emails! Thanks Tommy for the invaluable advice anyway ; ) As for the product in hand that I purchased I went with the rear exhaust blowing S2 fan unit as my shelf gaps are quite narrow between each other so could not have the top exhausting S7 fan units the way my system is set up. Got to say the packaging is simple, yet smart with well thought out packing design and protection. Once open it comes with a clear and concise instructions manual that has been written by a human who knows his stuff and not a robot that has then translated from Chinese to English. The fan unit it self is well built and has a great feature of been able to daisy chain these fans together so less usb ports are used to power them. The fan unit itself is fairly quite unless on the highest speed you can detect the sound but is only noticeable when it is quite in the room, I say this but have to note I am running Four of these in tandem at the moment so the noise is a cumulative sound of all four fans running on highest speed. I have also purchased the Fan thermostat thermal & speed controller AI-ATC which has a temperature sensor probe attached and which measures your hottest area of a piece of kit and my amps were running at around 40-50 celsius in fairly warm ambient temperature has been quite a hot summer anyway and with the fans in place has cooled my amps and processor down to between 21 & 24 Celsius which makes the top of the units feel nice and cool. before the arrival of having these fans my amps and processor felt so hot to touch It felt like I could cook some bacon and eggs on top of them but with the S2 fans they are almost cold to the touch. Only note for these S2 Rear blowing models is unfortunately they are not fully compatible with the smart mode of the thermostat & speed controller like the S7 top blower fans are but does still work and can be adjusted manually on the controller. Over all the S2 fan does what it says on the tin or cardboard packaging in this case and cools my Hifi equipment right down to a sensible temperature that is not going to frazzle the electronics. Can't rate these enough from the fan itself with the build and design to the great customer advice I had from these guys. Looking forward to getting an Aircom T8 next and some more mutltifans soon from AC Infinity. Review: A great product that will prolong the life of your electrical equipment - I recently upgraded my AVR which I keep in a closed cabinet with an open back. My AVR before would give of a bit of heat but nothing that worried me but my new AVR on the other hand, when I opened the cabinet door for the 1st time it was like opening an oven door, the heat just hit me. Worried I ordered one of these fans from desertcart & it arrived the next day. The quality of the fan is very good, especially for just £15. I simply plugged the fan into a USB plug & sat it on top of my AVR & job done. Now my AVR is running nice & cool. I will order another, even though one seems to be enough but for £15 why not. Also I have the fan running at medium & I can't hear it at all. ## Features - Quiet UL-certified blower designed to be placed on top of various electronics to draw out heat. - Features a multi-speed controller to set the fan’s speed to optimal noise and airflow levels. - Low profile design pushes air out the rear, ideal for applications with limited clearance. - USB plug can power the blower through USB ports found behind popular AV electronics and game consoles. - Blower Size: 4.7 x 4.7 x 1 in. | Airflow: 35 CFM | Noise: 17 dBA | Bearings: Dual Ball ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B012CL2V3I | | Air Flow Capacity | 35 Cubic Metres Per Minute | | Best Sellers Rank | 3,108 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 4 in USB Fans | | Brand | AC Infinity | | Compatible Devices | Electronic components, Desktop computers | | Cooling Method | Air | | Cooling method | Air | | Country Of Origin | China | | Customer Reviews | 4.6 out of 5 stars 1,482 Reviews | | Item Dimensions L x W x H | 25L x 120W x 120H millimetres | | Item Weight | 8 Ounces | | Manufacturer | AC Infinity | | Manufacturer Part Number | AI-MPB140A | | Material | Plastic Metal | | Max Rotational Speed | 2.5 RPM | | Model Number | AI-MPB140A | | Noise Level | 17 Decibels | | Number of Items | 1 | | Number of Packs | 1 | | Power Connector Type | 4-Pin | | Power connector type | 4-Pin | | Product dimensions | 25L x 120W x 120H millimetres | | UPC | 854759004495 | | Unit Count | 1.0 count | | Voltage | 5 Volts | | Wattage | 1.2 watts | ## Product Details - **Brand:** AC Infinity - **Compatible devices:** Electronic components, Desktop computers - **Cooling method:** Air - **Material:** Plastic Metal - **Maximum rotational speed:** 2.5 RPM - **Noise level:** 17 Decibels - **Power connector type:** 4-Pin - **Product dimensions:** 25L x 120W x 120H millimetres - **Voltage:** 5 Volts - **Wattage:** 1.2 watts ## Images ![AC Infinity MULTIFAN S2, Quiet 120mm USB Blower Fan - Image 1](https://m.media-amazon.com/images/I/619RTyEe+IL.jpg) ![AC Infinity MULTIFAN S2, Quiet 120mm USB Blower Fan - Image 2](https://m.media-amazon.com/images/I/61eTdzErbML.jpg) ![AC Infinity MULTIFAN S2, Quiet 120mm USB Blower Fan - Image 3](https://m.media-amazon.com/images/I/61937PlfmYL.jpg) ![AC Infinity MULTIFAN S2, Quiet 120mm USB Blower Fan - Image 4](https://m.media-amazon.com/images/I/61J-ILY8ONL.jpg) ![AC Infinity MULTIFAN S2, Quiet 120mm USB Blower Fan - Image 5](https://m.media-amazon.com/images/I/61-6CgQl2iL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: My S2 centrifugal fan is too noisy even on the lowest speed, I can hear a constant note from it. How can I run it slower than low?** A: You might be able to rig up a second speed switch in series with the first, which will have a subtractive effect on the voltage. I have two S2 fans in series, each with a speed setting switch, and the first switch affects both fans, the second affects only the second fan, which did indeed run slower as it stopped on lowest setting and is running (slower) on the mid setting. If it runs slower though, it may stop and it won`t be cooling much at all. Maybe the fan is in need of some TLC? Have you tried applying some lubricant to the fan, such as WD40 with added silicon? I am running 3 of these fans, on mid speed, and can`t hear them from 10 feet away. If the fan is just annoying you when whatever it is cooling is not on, then try plugging it into a USB that switches off when the gear is off. My TV and amplifier do that, only the Sky box leaves the USB power on all the time. Getting a second fan might allow you to run them in series with one running slower, or may demonstrate that your current fan is unusually noisy, in which case you already have a replacement. **Q: Do you get 1 or 2 fans in the pack?** A: This is a single fan in the S2 pack (I agree there are a couple of misleading photos showing use of 2 of them). Looks like there's a pair of fans in the S7 pack if you want two connected together from one power source. I have 2 S2 fans daisy-chained together powered by one amplifier`s USB outlet to cool itself and a separate power amp, so they only come on when the amplifier is on. **Q: How long is the usb cable?** A: Looking at it its 2M **Q: Which way is airflow** A: The fan picture shows the top of the fan. The S2 sits flat on the top of what you want to cool and it sucks air up out of what it is sitting on and blows the air out the rectangular port on one side. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great fans that work with a great customer service. *by F***R on 10 September 2016* To start of with I done my research after stumbling upon these cooling fans to cool down my AV system consisting of 250W mono block amps a dual processor which runs as hot as the amps as well a Sky box and PS 3&4 that run hot. I still had unanswered questions though so contacted AC Infinity's customer service to determine which type of fans suited my needs best. What can I say the customer service and helpful punctual reply's are second to none and wish all company's had this level of helpfulness & patience with all the questions I kept asking over several emails! Thanks Tommy for the invaluable advice anyway ; ) As for the product in hand that I purchased I went with the rear exhaust blowing S2 fan unit as my shelf gaps are quite narrow between each other so could not have the top exhausting S7 fan units the way my system is set up. Got to say the packaging is simple, yet smart with well thought out packing design and protection. Once open it comes with a clear and concise instructions manual that has been written by a human who knows his stuff and not a robot that has then translated from Chinese to English. The fan unit it self is well built and has a great feature of been able to daisy chain these fans together so less usb ports are used to power them. The fan unit itself is fairly quite unless on the highest speed you can detect the sound but is only noticeable when it is quite in the room, I say this but have to note I am running Four of these in tandem at the moment so the noise is a cumulative sound of all four fans running on highest speed. I have also purchased the Fan thermostat thermal & speed controller AI-ATC which has a temperature sensor probe attached and which measures your hottest area of a piece of kit and my amps were running at around 40-50 celsius in fairly warm ambient temperature has been quite a hot summer anyway and with the fans in place has cooled my amps and processor down to between 21 & 24 Celsius which makes the top of the units feel nice and cool. before the arrival of having these fans my amps and processor felt so hot to touch It felt like I could cook some bacon and eggs on top of them but with the S2 fans they are almost cold to the touch. Only note for these S2 Rear blowing models is unfortunately they are not fully compatible with the smart mode of the thermostat & speed controller like the S7 top blower fans are but does still work and can be adjusted manually on the controller. Over all the S2 fan does what it says on the tin or cardboard packaging in this case and cools my Hifi equipment right down to a sensible temperature that is not going to frazzle the electronics. Can't rate these enough from the fan itself with the build and design to the great customer advice I had from these guys. Looking forward to getting an Aircom T8 next and some more mutltifans soon from AC Infinity. ### ⭐⭐⭐⭐⭐ A great product that will prolong the life of your electrical equipment *by R***L on 27 February 2017* I recently upgraded my AVR which I keep in a closed cabinet with an open back. My AVR before would give of a bit of heat but nothing that worried me but my new AVR on the other hand, when I opened the cabinet door for the 1st time it was like opening an oven door, the heat just hit me. Worried I ordered one of these fans from Amazon & it arrived the next day. The quality of the fan is very good, especially for just £15. I simply plugged the fan into a USB plug & sat it on top of my AVR & job done. Now my AVR is running nice & cool. I will order another, even though one seems to be enough but for £15 why not. Also I have the fan running at medium & I can't hear it at all. ### ⭐⭐⭐⭐⭐ At last, they're back in stock! Amazing fans! *by R***H on 16 October 2019* I've been using one of these to cool my Denon AVR unit which the top of sits very close to the glass shelf above it. I have had this fan for a few years now and it is still going strong; I have it plugged into the USB port of my AV unit so it will run when the unit is on and it get's used A LOT, so that's testament to the longevity of this brand of fan. The fan is very quiet, much quieter than any other brands, and I have tried them all because AC Infinity fans have been out of stock in the UK for what seems like years! It has a 3 speed control switch so you can control the speed and noise. Be warned if you buy anything from AC Infinity, though: it will ruin every other brand for you because they are really that good. ## Frequently Bought Together - AC Infinity MULTIFAN S2, Quiet 120mm USB Blower Fan with Speed Control, UL-Certified for Receiver DVR Xbox Modem AV Cabinet Cooling - AC Infinity Controller 1, Thermal Trigger for AIRPLATE, MULTIFAN, USB Fans and Devices. Computer, AV Cabinet, Home Theater Cooling. - AC Infinity Turbo Fan Power Adapter, for MULTIFAN Series USB Fans --- ## 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.kr/products/60827217-ac-infinity-multifan-s2-quiet-120mm-usb-blower-fan](https://www.desertcart.kr/products/60827217-ac-infinity-multifan-s2-quiet-120mm-usb-blower-fan) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-08-25*