AC Infinity
MULTIFAN S7 Quiet USB Cooling Fan
Best cooling solution for home theater and AV equipment enthusiasts.
The AC Infinity MULTIFAN S7 is an ultra-quiet, dual 120mm USB cooling fan system engineered for reliable climate control of electronics. Ideal for DVRs, amplifiers, and AV equipment, this unit ensures smooth operation by managing heat effectively. It includes a multi-speed controller, allowing you to precisely balance noise levels against cooling performance. Built with premium dual-ball bearings for a long lifespan, the fans offer 104 CFM total airflow while maintaining a whisper-quiet 19 dBA. Powering is simple via any USB port, and an integrated extra USB port enables easy daisy-chaining for up to four fans.
$21.99
Owner Satisfaction
4.8
/ 5
Category Rank
35
/ 3597
#35 in Computer System Cooling Parts
Price vs Category Average
-85%
Below average
Fan Size
120
/ Dual mm
Who it's for
- Home office workers needing a silent, distraction-free environment
- Users wanting precise control over cooling and noise levels
- System builders requiring durable, scalable cooling for complex setups
Who should skip it
- Users cooling dense equipment requiring high static pressure
- Budget-conscious shoppers looking for the most affordable cooling option
- People without easy access to a nearby USB power source
Performance breakdown
Acoustic profile
Whisper-quiet operation ensures your media setup remains completely distraction-free.
Thermal efficiency
Delivers robust airflow to keep sensitive AV components running cool.
Build longevity
Dual-ball bearings provide exceptional durability for years of continuous service.
Installation versatility
USB power and flexible mounting options simplify integration into any cabinet.
Control precision
Multi-speed controller allows for perfect balance between cooling and noise.
System scalability
Daisy-chaining capability makes expanding your cooling setup effortless and clean.
Key Specs
Fan Size
Dual 120mm
Total Airflow
104 CFM
Noise Level
19 dBA
Speed
1300 RPM
Bearing Type
Dual Ball
Life Expectancy (L10)
67,000 Hours
Power Consumption
2.9 W (0.58 A at 3-7V DC)
Dimensions Per Fan
4.7 x 4.7 x 1.0 in
Features
- Ultra-quiet operation for minimal distraction
- USB powered for versatile placement
- Includes multi-speed controller for airflow tuning
- Dual-ball bearings ensure 67,000 hours lifespan
- Allows daisy-chaining up to four fans
- UL-certified for safety assurance
- Mountable horizontally or vertically
- Provides 104 CFM total airflow
What customers say
The AC Infinity MULTIFAN S7 earns exceptional praise for its remarkably quiet operation, often described as whisper quiet even at higher speeds. This low noise profile makes it perfect for noise sensitive areas like offices and home theaters. Users also highly value the robust build quality, featuring durable construction and protective metal grilles, contributing to a professional aesthetic. A key satisfaction driver is the included in-line speed controller, which offers precise airflow and noise balance for various electronics like routers and AV components. While the price is higher than generic options, customers agree the superior performance, longevity, and thoughtful design features fully justify the investment. It is viewed as an essential, high quality thermal management tool.
Know before you buy
Yes, the MULTIFAN S7 is USB-powered, making it compatible with any standard USB port found on receivers, consoles, or computers. It draws 0.58A, so ensure your device's USB port provides sufficient power for consistent operation.
The system is rated at 19 dBA, which is exceptionally quiet. Even at the maximum 1300 RPM setting, the noise is minimal and generally unnoticeable in a typical living room or office environment.
Yes, the system features an integrated USB port that allows you to daisy-chain up to four fans together. This is a convenient way to cool larger equipment racks using a single power source.
The fans are versatile and can be mounted horizontally or vertically depending on your equipment's ventilation needs. You can place them on top of vents to exhaust heat or position them against the side to pull cool air in.
These fans are built with dual-ball bearings, which are rated for a 67,000-hour lifespan. This design is specifically chosen for long-term reliability in environments where the fans may run 24/7.
The multi-speed controller is designed to adjust the airflow intensity rather than act as a hard power switch. To turn the fans off, you will need to disconnect the USB cable from the power source.
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