My AVR is close to 7 years and is in a 3 side closed cabinet and does runs a bit hot. Had earlier installed a small axial exhaust fan on AC power on back of cabinet. This exhaust though pushed decent air and keeps things little better but its also quite noisy. So its mostly switched off only and switch it on only in hot summer days.
Now since was planning to upgrade to better speakers now so in case new speakers drawing more power further heats up AVR and also to salvage some more life for old AVR, wanted to add some cooling option which can be kept on regularly.
Searched a bit and came across AC Infinity Multifan and Coolerguys fan running on USB power. These seemed decent option for my requirement but these are not locally available and can see only imported option so price was quite high.
As an workaround was thinking to use PC cabinet fans with cctv power supply box for 12V DC points to power these fan.But was not sure how good these would work and look. Also cost was going higher with using better brands and wanted to get something which would work out of box, So decided to wait till can get hands on AC infinity or equivalents.
But still something was required in meantime so thought of giving laptop coolers a try. These run on USB and look cleaner so fits the bills.
Searched a bit and ordered this one.
Initially thought for 2 fan model only but price difference was not much and also was not too confident of fan life so went with 4 fan option..in case 1 or 2 goes bad still there would be some working. It has 4 fans of 140 mm and airflow mentioned on box is 75 CFM which is near to AC infinity mutifan S7 102 CFM. On running is it throws mild air, do not have anything to measure airflow so cannot confirm if specs matches real world performance.
Using it more than a month and have kept it on top of AVR to pull air away. It fits well on top of AVR and also matches it nicely. It comes with USB A-A cable and connected it to a old mobile charger.
You can also see earlier cabinet fan at back of cabinet
Cooling is also decent, On keeping hand on top do not feel much airflow on box its mentioned airflow of but touching AVR can feel its cooler. Though again do not have anything to measure actual gain.
On not too good things:
It does have a 2 rotatory knobs . 2 fans for each knob. These are supposed to control fan speed but more so they only work as rotatory on-off switch.
There are 2 USB ports at back, one to provide power and other is to connect devices but when i connected power USB to my Shield TV and connected other to 1 TB HDD , it did was not recognized.
Fans have bright blue light and there is no option just to switch off light. At my viewing point there do not cause much irritation and in case they do I switch front 2 fans. Though not big issue for me but option should have been there.
Overall happy with. It does provide what I needed for now and can defer proper fan purchase till later.