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

I bought these fans to cool my 700 watt surround sound system receiver that produces a lot of heat, so this review will be in depth and thorough. I ran two tests, the first with the receiver on top of the cabinet with open airflow, and the second inside the cabinet with closed airflow. I will also use an Infrared Laser thermometer to test temperatures inside of the receiver, from whence the heat is created and is at its hottest, especially on heat sinks and chips. My receiver is vented all over the top and bottom so peeking through isn't a problem.Test 1 - For test one the receiver will sit on top of the cabinet with open airflow. Since heat rises i have placed the fans on top of the receiver blowing upwards since there is no room underneath it and the weight of it will crush these two fans even though they are built pretty tough. With no fans my receiver idles around 150 F and at loud volume rises to 200ish F. That's just too much. Now i throw in the dual AC Infinity fans and start them out at low and move to medium and them high, taking temperatures as i go. On low speed, temperatures only came down to about 190 F, so still no cigar. On medium i got more result, down to 150 F, which is what i call the green zone. And on high, the temps came down to a whopping 98 F. Also, the only time i could hear noise from the fans was on high, so they are indeed quiet and powerful. The static pressure wasn't bad either, i have more powerful inside my PC but you can actually feel some air coming from these.Test 2 - For test two the receiver went inside the cabinet. I expected results to be worse in there due to the restriction of airflow but i was surprised. With the fans in the same place i started with low speed and measured 180 F inside the receiver. I'm guessing the fans get better directional airflow inside a cabinet without things like a ceiling fan interfering. Medium speed is where it got interesting, 125 F is what i measured from the laser. And then on high speed, i measured a chilling 88 F on the heat sink around the power supply inside the receiver, usually the hottest spot i can point at with the laser. Very impeccable results. The only thing is that after 30 - 45 minutes there is a build up of heat inside my entertainment cabinet, so must leave the glass door open for heat to escape while in use, but now i wont haft to worry about it catching fire.Conclusion - Totally awesome fans. Their performance is impeccable. Also, they construction is very very solid and nice. If my reciever was just a little smaller and lighter i could sit it on top of these and have them blowing from the bottom. The grills are child finger proof and easy to clean, and the wiring and switch has nice thick cable and strong plastic. And the extra female USB port is great for when you need that third fan, or another set of AC Infinity fans. The only thing i could see improving here, other than the obvious like RPM's and static pressure, is making a true AC wall jack powered version of these with the double - triple - quadruple fan setup for devices that don't have USB ports. I know AC Inf. makes AC powered fans but they're all singles. Need multiples! I would highly recommend tese fans to anyone who needs extra cooling for their non-desktop PC electronic devices. You wont be disappointed.

These fans are great for ensuring circulation, cooling, and minimizing fan noise for your PS4.I’ll list some PRO TIPS below (pun intended).READ BELOW FOR THE TIPS.Though it’s completely normal for your PS4 to get medium-hot, it never hurts to maximize cooling for any electronic... ESPECIALLY in enclosed places.When the system is cooler, the internal fan don’t need to work as hard, maximizing efficiency and naturally prolonging the life expectancy and overall reducing its noise.These fans are super quiet and by keeping the system cool, the internal fans don’t need to work half as hard, thus reducing overall noise significantly... Which is a great bonus.With these fans on high setting, placed like in my photos, my PS4 never exceeds a mild warmth.These fans are versatile, allowing you to link more fans if you’d like, and allowing you to set them up however you’d like depending on your setting.NOW FOR THE TIPS:1. Do this first!You’re probably aiming to reduce noise and/or keep the system as cool as possible, so I’d HIGHLY recommend to begin by dusting out the internal fan just for the added benefit. It’s very simple with the PS4 PRO. Simply pop off the top cover and air dust or lightly wipe off the fans and place the cover back in. (Refer to how-to videos online). This’ll keep the internal fans running efficiently.2. USB tips:(1). There is a hidden USB port in the BACK of the PS4 PRO use that one to keep it out of the way and to leave your front two USB ports free.(It can turn on and off with your PS4)(2). You’re likely using a 4K TV or any TV with many ports these days, so chances are you have a USB port in the back of your TV, that is another convienent option for you. I use this option.(It can turn on and off with your TV)(3). You can simply use an adapter to plug into the wall, but you’ll have to remember to turn it off and on manually.3. Fan placements:(The side that blows out is the side where the wire is visible)The placements I personally recommend and use myself (pictured) is one fan on the bottom holding up the PS4, blowing UP onto the bottom of the PS4 and one fan sitting on top blowing DOWN onto the PS4.Creating an external fan sandwich.Having the PS4 lifted will also allow the bottom to get some proper air flow.(I found a foam and plastic piece that I placed under the front of the PS4 as well, just to make sure the PS4 sits comfortably & with better balance.. I’d recommend something like that too).Side note: if you’re gonna set it up like this, put something under the feet of the fans if you’re placing it on wood.. Otherwise, it could leave light rings in the wood from the pressure.Alternative placements:(1). You can sit up one of the fans so it blows right into the vents on the right side of the PS4, this’ll help get cold air into your PS4. Not a bad option.(2). You can also sit up a fan at the back of the PS4 (where air escapes from the system), blowing air AWAY from the PS4 - helping suck the air out.But honestly, i think the other methods are more effective. I’d probably only recommend this one if your PS4 is in an enclosed area and you want to help the hot air escape from the area (like fan cutouts at the back of your enclosed area). Otherwise, the other methods work better in my experience.If you found this review helpful, please thumbs up this review! Thank you.