AC Infinity, MULTIFAN S4 Quiet USB Cooling Fan

bought is companies stuff as it is designed for high end consumers. not us regular , rather the breaking bad type of high end consumers. hope you understand the analogy. so what is great. its quiet and high quality it will continue working without supervision especially if you are locked in or doing time. it will continue to work flawlessly behind your back and you don't have to worry about it. its silent and yes there is going to be some wind noise however there isn't going to be any whining noise. I use it to cool tp link deco be85 mesh wifi. the be 85 has inbuilt fans.however those fans were no good . I has to install this unit beneath each of those satellites . now never have had any reason to restart the mesh network. the medium speed is good in summer and I guess I can switch to low speed in winter to keep everything going. I the went ahead and bought the 2 fan version from same company to place under my virgin media hub 5 or 6 and the other end behind my tv ports unit. have had them for a months and I can say this unit is good quality. the power is supplied by usb a type plug which is connected to some usb a outlet on the powerstrips I have near appliances. the airflow is restricted unless you place something under the fan to raise it above around 1 inch above its plastic pucks to achieve silence and better airflow. it can not work with the plastic pucks alone. they will not let enough air flow beneath the fan to throw upwards. it needs clearance on at least the input side of 1 to 2 inches to achieve good blowing power. the 140mm size is good for be85 as it blows inside and around the body of the unit and man oh man is the tp link deco be85 big. so you can get an idea. it is as large as a 70kg persons thigh . so you get an idea that 140mm is a bit larger then a persons thigh . power consumption is ok however I didn't test it. seems the 2 fan 120 mm works as good as the 140mm single fan version. I would have preferred the 140mm version as it was single unit in comparison to the dual 120mm versions which I now have to place 1 below and 1 on top of the other be85 deco unit. definitely buy other stuff from this company . if you need an exhaust fan this is the company. if you need electronic cooling fan this is that company. they have a huge variety of stuff that carters to that class of people who we all hate however they are the ones making all the money after other bad businesses in the world. the 4 or 6 greatest money makers businesses right now running the world . and yes it definitely isn't owing a pizza chain or a restaurant or clothing store.

These are great fans, purchased two for the top of my Axolotl tank as aquarium fans can be unreliable, noisy, poor quality, pricey for really good ones. These make no noise at all and have several speed settings, they really do the job well, I may hook them up to a controller in future.

Fantastic product. Quality built and high class packaging. Easy and clear way to use. Solved my burning Amp inside a closed cabinet. I really can leave it ON on Hi mode and close the door knowing my amp will be on low temp for the whole day. Mind you that I couldn't use the USB input of my integrated amp, Arcam SA20 properly. It will run the fan off course but it will prevent the amp to go to sleep mode when there is nothing to play. Minor issue but it would be nice if it did work that way. Not the Fan’s fault, though. On Hi mode when the door is closed I can’t hear the fan at all even without any music playing. If the door is open may Lo mode for low volume works better although still on high volume you barely notice the fan.

Top quality 5*

I have an amplifier in an open cabinet that gets quite hot and in the height of summer overheated and shut down. I bought this in the hope that it would stop this happening and the results have been really good. Before the addition of the fan the amp would run at around 65C and after the addition of one of these fans at the side blowing over the casing on its lowest setting it dropped the working temperature by 30C to 35C so good results overall. These fans do have a couple of negatives however. Firstly if you are a critical music listener anything higher than it's lowest setting is likely to be audible and secondly, the biggest issue for me is that AC Infinity make a big song and dance about being able to daisy chain multiple fans together but when you do this you lose all control over the fan speed. I daisy chained just 2 together and wanted them both on the lowest setting due to the noise issue but this does not work. The first fan did not spin at all and the second one was super slow. It turns out that you have to put the 1st fan in the chain on maximum for the 2nd fan to work so all control is lost! I had this confirmed by AC Infinity support and I am now having to run the second fan off a separate supply which totally defeats the object of being able to connect them together, hence the loss of a star from my rating.

I've now bought a couple of these fans. They have variable speed and are being used to cool some network devices by sucking air over them. Even at the slowest setting they are very effective and are silent. I particularly like the rubber feet supplied which allows the fan to sit noiselessly on a server or to clip on to the edge of a vertical device. Runs on USB output from one of the devices - they can be 'passed through if the port is needed to connect a signal cable. Not sure if you could run the fan AND power a device through the USB port so perhaps only connect self powered USB devices through this cable.

This is by far the most silent fan that I have up to now, on setting 1 you will not know it is on, max setting can have some sound but its not bad, there are other fans out there but the sound level on them is not good, the rubber feet helps keep it in place with no vibration, you can remove all rubber feet and wire fan guard, you can also daisy chain to other fans of the same if needed with the added USB input.

Pushes plenty of air and is quiet, however it has a high pitched noise coming through at all speed levels, so something is most likely wrong with my unit. Refunded.

静音タイプの冷却ファンで、スライドスイッチによる弱中強3段階の運転モードが選択でき、ファン同士の連動運転も可能となっている 前々からPCの冷却手段に導入しており、優秀なファンというのは既に実証済み。今回は、自分でレストアしたDENONのプリアンプの延命処置として予備機1台を使用したが、電源トランスの排熱量が予想を超え、1台では明らかに能力不足だった為直ぐに2台目を購入。 ファン側での連動運転はせず、プリアンプ側の電源で同時運転させているが、2台動かしていても中運転までなら全く気にならないし、電源トランスの排熱も良好。シンプルながら信頼性の高い冷却ファンだと改めて実感。 ゲームハード等の冷却にも大変オススメ！

Excelente producto, excelente acabado y presentación, funciona perfecto, enciende y apaga junto con el receiver conectado al USB, o si compras el cargador lo conectas al regulador o al enchufe de pared. es lo más recomendable para evitar daños al puerto USB del amplificador, es silencioso, imperceptible incluso a volumen bajo y el receiver trabaja mucho muy fresco en la velocidad más baja del ventilador, que impresionante, mega recomendado! He comprado 5, uno para cada amplificador.

Veilig met de roosters en stil. Goed te plaatsen met de rubberen steuntjes en/of met een schroef/boutje door deze aansluitingen Voldoende luchtverplaatsing voor mijn doeleinden. Maar je kunt er makkelijk meerdere aan elkaar koppelt één voeding

Quiest aesthetic fan. Small, light, and works well. 4 mode.. off, low, medium and high. I have it mostly on high as electronics is inside an enclosed area. Unfortunately there is no auto on/off switch.. would be perfect if it automatically turns on everything my electronics go on, but I am not sure if there's such a product currently on thr market. This is a great fan, may get more.

Im writing this review during a very HOT unusual few June weeks in Minnesota, its been over 90 for almost 2 weeks now, I have a full size 42U server rack for my home lab, it has a big hole on top that nobody's exhaust fans fit, 21 x 5.5, but the 140mm measurements of this fan is just big enough that I can sit about 4 of them on top of the racks hole. I work in Tech Recycling, so I see what happens to most tech equipment when its removed from service, its rare to see AC Infinity products, I rescued a old AC Infinity Controller they don't appear to sell anymore, but its similar to the one they sell now, and rescued a 2U Rackmount 4 fan with controller unit, I was amazed how quiet the rack mount fan unit was even after many years of use, the LCD controller is a bit hard to read, but other then that it works fine. So I needed some USB fans to plug into the other controller I rescued, I was concerned there was only 2 USB ports, which is the same as new model they currently sell, but when these fans arrived, I saw a lovely daisy chain USB connector, apparently you can have up to 4 of these on 1 of the USB controller ports so those 2 ports give you maybe 8 fans , I don't need that much, but its a nice feature, I plugged these in to the old controller set it on AUTO and away they go. The controller appears to have Low/Med/High setting but these fans also have a 4 way switch on the cord which seems to be 1 notch higher then whats available on the controller, I have them maxed, very light hum, not much more then my laptop fans on a hot day. Compared to others, I have rescued hardwired plug and run fans with no thermostat, that sound like a bunch of servers running, so these are by far the quietest ive heard (almost can't tell they are running), Now that I know they daisy chain, I bought 2 more, with 4 of these at about $15 each vs $300-400 exhaust fans that are usually 120mm, they sell for most racks this is a great deal and larger. Perfect product, not sure how strong they are? they are not as FAT/DEEP as some Ive seen at work, its very hot, my rack runs about 3-4 degrees hotter then the room its in, so even with the fans they are having a hard time cooling it down, but air circulation is always good. its hard to get cool when the room itself is hot upper 80s, and rack is maintaining lower 90s. Only thing I would add to this product, RGB colors would be nice for those of us that like adding colors to our loved computers, but probably wastes electricity and reduces power so maybe its better they don't have color lights. (only if it don't sacrifice cooling power) CLIPS, since Im buying 4 of these to fill that big 5.5 x21 inch hole in my rack that normally a bunch of wires would go through, but in my home lab all wires go down, Im using that hole as a exhaust for the heat to exit up to the ceiling, these cool rubber feet are nice, but it would be nice to clip these together with some kind of clip so instead of 4 loose fans its 1 big fan. The feet are good, but since I have 3 cats that can jump on top of the rack it would be nice to link these fans together with some kind of bracket or clip just in case, not too worried about it, but it would be a nice modular feature. Lucky for me its only hot in Minnesota 3 months a year, so most the year these fans won't have to work hard, but they are running 24/7 now in a near 90 degree room. These would be great for quiet rooms, chances are your normal household fan is louder. Love the product, both the old ones I rescued that were not quite ready to be recycled yet, and these new fans.