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AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling

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4.7 3,080 ratings

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Purchase options and add-ons

Product Dimensions	1"L x 5.5"W x 5.5"H
Brand	AC Infinity
Power Connector Type	4-Pin
Voltage	5 Volts
Wattage	1.5 watts
Cooling Method	Air
Compatible Devices	Amplifier
Noise Level	18 dB
Material	Rubber
Maximum Rotational Speed	2000 RPM

About this item

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

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This item: AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling

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AC Infinity Turbo Fan Power Adapter, for MULTIFAN Series USB Fans

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AC Infinity MULTIFAN S7, Quiet Dual 120mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling

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Product details

Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 1 x 5.5 x 5.5 inches; 0.32 ounces
Item model number ‏ : ‎ AI-MPF140A
Date First Available ‏ : ‎ October 18, 2013
Manufacturer ‏ : ‎ AC Infinity
ASIN ‏ : ‎ B00MWH4FL4
Country of Origin ‏ : ‎ China

Best Sellers Rank: #136 in Computer Case Fans

Customer Reviews:
4.7 3,080 ratings

Top Brand: AC Infinity

Highly Rated

100K+ customers rate items from this brand highly

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100K+ orders for this brand in past 3 months

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From the brand

AC Infinity is a technology company that specializes in environmental controls for audio/video and HVAC. The company was founded on the principle of working closely with customers to develop great products. Dependable service and a commitment to product quality are the foundations of the business's values.
AIRCOM Series

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AIRPLATE Series

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CLOUDPLATE Series

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MULTIFAN Series

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Product Description

AC Infinity MULTIFAN Quiet USB Fan for Receiver DVR Playstation Xbox Computer Cabinet Cooling

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.


	AC Infinity, MULTIFAN S1 Quiet USB Cooling Fan	AC Infinity, MULTIFAN S3 Quiet USB Cooling Fan	AC Infinity, MULTIFAN S4 Quiet USB Cooling Fan	AC Infinity, MULTIFAN S5 Quiet USB Cooling Fan	AC Infinity, MULTIFAN S7 Quiet USB Cooling Fan	AC Infinity, MULTIFAN S2 Quiet USB Cooling Blower

Customer Reviews	5,763	5,942	3,080	10,199	7,740	1,433
Price	$11.99	$13.99	$15.99	$15.99	$19.99	$16.99
Model	AI-MPF80A	AI-MPF120A	AI-MPF140A	AI-MPF80A2	AI-MPF120A2	AI-MPB140A
Dimensions	80x80x25 mm	120x120x25 mm	140x140x25 mm	80x80x25 mm (x2)	120x120x25 mm (x2)	120x120x25 mm
Airflow	26 CFM	52 CFM	57 CFM	52 CFM	104 CFM	35 CFM
Noise	17 dBA	18 dBA	18 dBA	18 dBA	19 dBA	17 dBA
Multi-Speed Controller with Power Switch	✓	✓	✓	✓	✓	✓
Dual Ball Bearings at up to 67,000 Hrs	✓	✓	✓	✓	✓	✓
Axial Fans Meet UL-507 Standards in 2018 for Safety (Underwriters Laboratories #E503903)	✓	✓	✓	✓	✓	✓
USB Plug with 6-foot Power Cord	✓	✓	✓	✓	✓	✓
Compatible with Turbo Wall Adapter (Sold Separately)	✓	✓	✓	✓	✓	✓
Applications (Can by laid flat or stand upright)	Receiver, DVR, Router, Modem, Xbox, Playstation, and other Audio Video electronics	Receiver, DVR, Router, Modem, Xbox, Playstation, and other Audio Video electronics	Receiver, DVR, Router, Modem, Xbox, Playstation, and other Audio Video electronics	Receiver, DVR, Router, Modem, Xbox, Playstation, and other Audio Video electronics	Receiver, DVR, Router, Modem, Xbox, Playstation, and other Audio Video electronics	Receiver, DVR, Amplifier, Router, Modem, and other Audio Video electronics

Product guides and documents

Certificate of Analysis (PDF)

Certificate of Compliance (PDF)

Safety Information (PDF)

User Manual (PDF)

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Customer reviews

3,080 global ratings

How customer reviews and ratings work

Customers say

Customers appreciate the fan's quiet operation and effective temperature control. They find it works well and eliminates overheating problems. The fan is well-made with sturdy, heavy materials. Overall, customers consider it a great fan with plenty of uses.

AI-generated from the text of customer reviews

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Quietness Works well Temperature control Build quality Fan quality Airflow Value for money Speed control

440 customers mention "Quietness"417 positive23 negative

Customers appreciate the fan's quiet operation. They mention it provides cooling quietly without vibration noise, and has a 4 speed selector slide.

"Fan is very quiet, had to place my hand in front of it to check if it was running. It appears to be well made and also reasonably priced...." Read more

"...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...." Read more

"...My concerns have been a little eliminated. This is very quiet and it immediately took away the heat from my two hard drives that I was trying to..." Read more

"...I bought several S4 3 years ago and running 24 hours a day with no audible sound and zero issues. Perfect performance in my life...." Read more

274 customers mention "Works well"267 positive7 negative

Customers are satisfied with the fan's performance. They find it quiet and effective at cooling devices, keeping them cool, and allowing for proper airflow in terrariums. The fans have worked well for them over a year of constant use without any issues.

"...Saved money buying the fan.So far, it is running well and keeping the modem/router cool keeping my internet service running..." Read more

"...S4 3 years ago and running 24 hours a day with no audible sound and zero issues. Perfect performance in my life...." Read more

"...They are powerful for their size and get the job done. I confidently recommend them." Read more

"...They operate very well in my orchidarium (a big terrarium made for keeping orchids at a specific, constant temperature and humidity)...." Read more

237 customers mention "Temperature control"209 positive28 negative

Customers appreciate the temperature control of the fan. It keeps their devices cool, even under full load, eliminating overheating problems. The fan eliminates hot spots from the case and provides a steady flow of warm air into the living space. They find it a simple plug-and-play cooling solution, starting automatically on power-up.

"...So far, it is running well and keeping the modem/router cool keeping my internet service running smoothly...." Read more

"...This is very quiet and it immediately took away the heat from my two hard drives that I was trying to protect extremely happy with this fan." Read more

"...And this happened. The console went from hot 🔥 to zero heat to be felt coming from the case. Fan air is cool with a hint of luke cool air...." Read more

"the adjustable speed works great and really cools down mini PC" Read more

216 customers mention "Build quality"194 positive22 negative

Customers appreciate the fan's build quality. They say it's well-made, with a solid plastic body and blade guards on both faces. The fan itself is of good quality, with a cord and switch that are also of good quality. It still runs strong with no issues, indicating good bearings. The system is much more stable, and the packaging, build quality, double ball-bearing construction, very quiet operation, and well-designed, clearly laid-out.

"...It appears to be well made and also reasonably priced...." Read more

"...report.. so far after a few months the 2 I have are still going strong with no issues. Well worth the price for the quality and performance." Read more

"...2 for my series X to help cool it TOP AND BOTTOM whisper quiet very well made ....OUTSTANDING RESULTS.HIGHLY RECOMMENDED!!!" Read more

"Me neither. The fan feels high quality in build and materials...." Read more

147 customers mention "Fan quality"132 positive15 negative

Customers appreciate the fan's quality. They find it quiet, efficient, and versatile for various uses. The air is cool with a hint of lukewarm air. The fan can act as a blower fan or intake fan, just flip it to whichever side. It cools routers pretty well.

"...the fans they are having a hard time cooling it down, but air circulation is always good...." Read more

"...Fan air is cool with a hint of luke cool air. Zero heat. It's no joke...." Read more

"...meaning the fan is very low power consumption. The 3 way level switch gives me options of air power strength...." Read more

"...This fan is a perfect fit because of its rubber feet, fan grilles, and large size that make it a perfect base for the little PC...." Read more

117 customers mention "Airflow"82 positive35 negative

Customers like the airflow of the fan. It moves a lot of air, is quiet, and has USB power.

"Does the job of moving air around. Thinking about getting g a couple more to ventilate my receiver." Read more

"This thing is whisper quiet and moves a good amount of air, perfect for cooling whatever you need cooled." Read more

"...The closed desk drawer is obviously not air tight so the added fan helps push the warm air out and I notice that the Mac Mini case stays cooler...." Read more

"Works perfectly. Quiet. Moves a lot of air." Read more

74 customers mention "Value for money"74 positive0 negative

Customers appreciate the value for money. They say it's a great product for the price and well worth it.

"...It appears to be well made and also reasonably priced...." Read more

"...Well worth the price for the quality and performance." Read more

"...Other than that little grip, the item is great, looks nice, fits perfectly on the Xbox Series X and more importantly it works well, you will not..." Read more

"...So from our experience, they are well-built, reliable, and relatively inexpensive. You can't really go wrong with AC Infinity!..." Read more

65 customers mention "Speed control"52 positive13 negative

Customers appreciate the adjustable speed control of the fan. They like the three-stage switch with off, low, medium, and high settings. The fan is quiet and moves air consistently, not fast.

"the adjustable speed works great and really cools down mini PC" Read more

"...Very quiet.....and the speed control works great. And they turn off when the computer turns off. Sweet." Read more

"...The fan has a small, inline speed controller that gives you three speeds of operation and airflow options as well as an off switch...." Read more

"...Build quality is top notch, feels commercial quality. Low speed is getting the job done but even on high it’s silent." Read more

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Top reviews from the United States

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J. Pena

Well made quiet fan

Reviewed in the United States on April 28, 2022

Color: BlackSize: 140 mmVerified Purchase

Fan is very quiet, had to place my hand in front of it to check if it was running. It appears to be well made and also reasonably priced. I purchased the fan because my AT&T modem/router was over heating and causing intermittent service. It was either running my A/C at 75 degrees or buying the fan. Saved money buying the fan.

So far, it is running well and keeping the modem/router cool keeping my internet service running smoothly.

Word of advice: If you are experiencing intermittent internet service it maybe your modem/router is over heating. I found out this on my own after 4 visits from the AT&T technician. They couldn’t figure out why it was happening. Fortunately, I kept a log when the internet was going out and reconnecting. As the temp got over 77 degrees during the day the internet would stop working.

2 people found this helpful

Helpful

doesitreallymatter873

Almost Invisible/Stealth Quiet

Reviewed in the United States on June 9, 2021

Color: BlackSize: 140 mmVerified Purchase

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.

9 people found this helpful

Helpful

RedRockRick

very quiet and it pushes air very well!

Reviewed in the United States on October 8, 2024

Color: BlackSize: 140 mmVerified Purchase

I read reviews that said this was noisy so I was a little concerned. My concerns have been a little eliminated. This is very quiet and it immediately took away the heat from my two hard drives that I was trying to protect extremely happy with this fan.

Helpful

SOHO IT

Quiet, Quality product.

Reviewed in the United States on April 21, 2024

Color: BlackSize: 140 mmVerified Purchase

AC Infinity MULTIFAN S4 is working great. I use them to cool my electronics such as POE switches. I have a Raspberry Pi running PI-hole next to a switch with an AC infinity running next to it and dropped the temps of the switch and the Pi significantly. I bought several S4 3 years ago and running 24 hours a day with no audible sound and zero issues. Perfect performance in my life. Like the 3-speed switch and rubber standoffs. I highly recommend it.

Helpful

SSL

We don't like fans ....

Reviewed in the United States on November 22, 2024

Color: BlackSize: 140 mmVerified Purchase

Our goal has always been "completely passive cooling".

So imagine our surprise when these fans turned out to be so quiet they were usable. We own many of them now - all sizes.

Well done. Amazon, please keep them in stock and do not drop ship through UPS. It seems that everything coming from California gets stolen or lost these days. Keeping them in stock at Amazon makes these problems go away.

Helpful

Wesley

So far so good.

Reviewed in the United States on December 5, 2023

Color: BlackSize: 140 mmVerified Purchase

I’ve owned these fans for approximately a year now, and have had no problems with them. They are powerful for their size and get the job done. I confidently recommend them.

Helpful

Kyle

Zero heat. Actually cool.

Reviewed in the United States on April 17, 2024

Color: BlackSize: 140 mmVerified Purchase

I retroed out my xbox series s. Got out my tin snips and plyers and double sided heavy duty utility tape. And this happened. The console went from hot 🔥 to zero heat to be felt coming from the case. Fan air is cool with a hint of luke cool air. Zero heat. It's no joke. I wired the large fan with two brushless 2 inch fans that push air in the side while the 6 inch fan pulls air off the case. You can see in the photos provided all the metal I've removed as well as plastic. Zero heat. Lol. Who has a hot processor, then wraps it in tin, and plastic... and expects it to not get hot as hell????. Microsoft! ( update ) I have hooked up a digital thermo reader to it. Ran somewhere from 106 to 130 F . before I messed with it. Now it holds at ( 85f to no higher then 90F) when I run the fan on Medium and am pushing the processor with difficult frames and processes. ( If you run the fan on High, which is a little loud, processor temps don't ever touch 90 degrees. Fun stuff to tinker with. have a good one. take care folks.

2 people found this helpful

Helpful

Ryan

Work as expected

Reviewed in the United States on October 12, 2024

Color: BlackSize: 140 mmVerified Purchase

Nothing bad to report.. so far after a few months the 2 I have are still going strong with no issues. Well worth the price for the quality and performance.

Helpful

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Jorge S.

Excelente producto! Mega recomendado!

Reviewed in Mexico on October 29, 2024

Color: BlackSize: 140 mmVerified Purchase

Excelente producto, excelente acabado y presentación, funciona perfecto, enciende y apaga junto con el receiver conectado al USB, silencioso, imperceptible incluso a volumen bajo y el receiver trabaja mucho muy fresco en la velocidad más baja del ventilador, que impresionante, mega recomendado!

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Niaz

Stellar Performer that Exceeds Expectations, Simply Outstanding!

Reviewed in Canada on September 4, 2023

Color: BlackSize: 140 mmVerified Purchase

I recently purchased the AC Infinity MULTIFAN S4, and I am astounded by the exceptional quality and performance of this fan. I must confess that, given its price range, I had moderate expectations. However, this product completely shattered those expectations by offering a premium experience.

Key Highlights:

Premium Quality: The build material and finish are impressive, something I did not anticipate at this price point. The build quality is durable and exudes a high-end feel.

Quiet Operation: The fan is incredibly quiet, even at higher speeds. If you're looking for a noise-free environment, this fan has got you covered. It's so quiet that I had to double-check to make sure it was running.

Efficient Cooling: I purchased this fan to keep my good old 2018 Mac Mini i5 cool, and it does the job remarkably well. The temperature drop is noticeable, and the device runs much smoother than before.

If I could give this more than five stars, I absolutely would. Highly recommended for anyone in need of an efficient cooling solution.

Syedh

Silent, fast 3 Speed USB fan

Reviewed in the United Arab Emirates on August 31, 2024

Color: BlackSize: 140 mmVerified Purchase

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.

Alex

Not the cheapest but reliable and very effective

Reviewed in the United Kingdom on July 7, 2020

Color: BlackSize: 140 mmVerified Purchase

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.

=HR=

USB Ventilator AC Infinity S4

Reviewed in Germany on July 4, 2017

Color: BlackSize: 140 mmVerified Purchase

Ich habe gleich zwei davon bestellt um meine PS4 Pro etwas zu kühlen, die bei Horizon Zero Dawn doch passagenweise nervig lautes Kreischen fabriziert. Laut genug um dass ich es selbst unter meinem Headset höre ... klar kann man sagen "Junge, du hast 'n besch***enes Headset" und das stimmt vielleicht sogar, aber dann bin ich lieber froh, dass ich die PS4 noch höre. Obwohl sie schon ein Kühlpad drunter hat, erzeugt sie offenbar so viel Wärme, dass die Lüfter darin annähernd unter Volllast laufen. Das geht natürlich nicht und so habe ich zwei dieser Ventilatoren gekauft.
Ich habe verschiedene Konstruktionen ausprobiert, das beste (PS4 ist am leisesten) hatte ich, als ich beide Ventilatoren rechts neben die Konsole stellte und Luft sowohl in's Gehäuse als auch hinter der Konsole entlangfließen lasse. Damit wird die warme Luft, die die PS4 hinten ausstößt gleich wegtransportiert und staut nicht groß auf. Zudem wird ständig kalte Luft in die PS4 geleitet und darunter und darüber wird die Luft auch ständig in Bewegung gehalten, so dass mehr Wärme über die Oberfläche abgegeben werden kann. Man kann die Ventilatoren auch so platzieren, dass je einer auf einer Seite steht, einer pustet die Luft über die Konsole, der andere saugt sie ab ... allerdings war dies nicht ganz so effizient.

Zum Lüfter selbst. Man kann mehrere Lüfter nacheinander schalten, laut Bedienungsanleitung bis zu 4 Stück. Man muss dabei aber beachten, dass sie in einer Reihe geschaltet sind. Der erste Lüfter kann ohne die anderen betrieben werden, aber der zweite nicht ohne den ersten, der dritte nicht ohne den ersten und zweiten, und so weiter.
Wenn beide Lüfter von allein anlaufen sollen (beispielsweise zusammen mit dem Starten der PS4), muss ich sie von der Geschwindigkeit im ausgeschalteten Zustand (kein Strom über USB) mindestens auf der Stufe "Medium" stehen haben ... und zwar alle beide! Auf "High" geht auch, aber "Low" reicht für den zweiten Lüfter nicht aus.
Die Lüfter sind nicht unbedingt "flüsterleise" und man kann sie besonders unter Vollast doch recht deutlich hören. Allerdings sind sie mit "Medium" durchaus schon kräftig und relativ ruhig (und nicht lauter als die PS4 Pro im regulären Betrieb, beispielsweise beim Abspielen einer BluRay).

Ich habe diese Lüfter auch testweise mal auf meine Onkyo-Anlage gestellt und zwar so, dass sie von vorn betrachtet hintereinander auf den Lüftungsschlitzen liegen. Der hintere hat Luft hineingepustet, der vordere Luft herausgezogen. Selbst bei niedriger Drehzahl der Lüfter (und dann sind sie so gut wie nicht mehr zu hören, gegen den Klang der Anlage sowieso nicht) wird die Anlage zwar immernoch etwas warm, aber nicht mehr so heiß wie sonst üblich. Der Unterschied ist mehr als deutlich und seitdem steht fest, dass ich noch mehr dieser Lüfter bestellen werde.
In einen USB-Anschluss einstecken, einschalten, fertig!
Die Ergebnisse bei der PS4 waren nicht überragend aber spürbar, das Ergebnis bei der Onkyo-Anlage war kaum in Worte zu fassen.

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AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling

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Product details

Top Brand: AC Infinity

From the brand

AIRCOM Series

AIRPLATE Series

CLOUDPLATE Series

MULTIFAN Series

Product Description

MULTIFAN Series

Key Features

Multi-Speed Controller

Ultra-Quiet Fans

Quality Approved

Silicone Rubber Feet

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Top reviews from the United States

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Top reviews from other countries

5.0 out of 5 stars Excelente producto! Mega recomendado!

5.0 out of 5 stars Stellar Performer that Exceeds Expectations, Simply Outstanding!

5.0 out of 5 stars Silent, fast 3 Speed USB fan

5.0 out of 5 stars Not the cheapest but reliable and very effective

5.0 out of 5 stars USB Ventilator AC Infinity S4

Excelente producto! Mega recomendado!

Stellar Performer that Exceeds Expectations, Simply Outstanding!

Silent, fast 3 Speed USB fan

Not the cheapest but reliable and very effective

USB Ventilator AC Infinity S4