i have a denon avr s940h reciever in an enclosed cabinet with 4 inches from top of reciever to top of cabinet. Will the s9 or t9 work?

4" from the top of your receiver means only 2.5" from the top of the AIRCOM S9. This may be too little clearance for a top-exhaust unit. You say "enclosed cabinet." I assume one side is open. The hot air needs to vent somewhere. If this is true then go with a front or rear exhaust system instead. The AIRCOM S10 is the front-exhaust version and S8 is rear-exhaust. Also, I like the S-Series because it offers all the control over the fans that I require. The T-Series costs more and seems a little overkill. Unless, however, you really like the LCD display.

Will this work in automobile applications

It works off of 120. You should call the company and ask them if they have fans for automotive applications.

does anyone use these fans in a stack? in between 2 components (amp, fan unit, avr for example)?

As long as you have proper clearance I don't see why it wouldn't cool ok. I think it pulls air upwards better than pushing air but I have used it to push air up thru an amp.

Have a receiver in a cabinet with 3.5" space behind it to back of cabinet or about 5" above it to a glass shelf. Top or rear exhaust unit is better ?

This unit exhausts from the top and I have about 1 inch above the unit. It works perfectly. I’ve had no problems with the receiver overheating, since I purchased the fan. If you have 5” above, it should work very well for you.

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AC Infinity AIRCOM S9, Quiet Cooling Fan System 43 cm

AC Infinity AIRCOM S9, Quiet Cooling Fan System 43 cm

Product ID: 52124108

Details

Brand
AC Infinity
Compatible devices
Amplifier DVR
Cooling method
Air
Material
Alloy Steel
Maximum rotational speed
6700 RPM
Noise level
21 Decibels

💨210 CFM airflow

🔇Ultra-quiet 21 dBA noise

⚙️3 dual-ball bearing PWM fans

₹ 33348

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Description

❄️ Stay cool, stay ahead — silence is the new power move.

WHISPER QUIET COOLING - Keep your AV gear chill without the noise distraction.
ROBUST TRIPLE FAN DESIGN - Three high-RPM dual-ball bearing fans ensure peak performance and longevity.
SLEEK SPACE SMART BUILD - Slim 17 x 13.5 x 1.5 inch profile fits seamlessly into any AV setup.
PRECISION THERMAL CONTROL - Two thermal trigger modes + four speed settings for tailored airflow.
UK READY POWER COMPATIBILITY - Type-G plug and 12V voltage optimized for hassle-free UK use.

The AC Infinity AIRCOM S9 is a premium 43 cm quiet cooling fan system engineered to protect your AV components like receivers, amplifiers, and DVRs from overheating. Featuring three PWM-controlled dual-ball bearing fans delivering 210 CFM airflow at a whisper-quiet 21 dBA, it offers customizable thermal triggers and speed controls for optimal performance. Its slim alloy steel design fits neatly into AV cabinets, and it comes with a UK-compatible Type-G power plug, making it the smart choice for millennial professionals who demand silent, efficient cooling.

Specifications

ASIN	B01LVUWOBX
Air Flow Capacity	210 Cubic Feet Per Minute
Best Sellers Rank	20,521 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 92 in Electronic Cooling Fans
Brand	AC Infinity
Compatible Devices	Amplifier, DVR, Receiver
Cooling Method	Air
Country Of Origin	China
Customer Reviews	4.7 4.7 out of 5 stars (2,831)
Item Dimensions L x W x H	43.2L x 34.3W x 3.8H centimetres
Manufacturer	AC Infinity
Manufacturer Part Number	AI-ACS9
Material	Alloy Steel
Max Rotational Speed	6700 RPM
Model Number	AI-ACS9
Noise Level	21 Decibels
Number of Items	3
Number of Packs	1
Power Connector Type	SATA/Molex or 3-pin/4-pin
UPC	854759004655
Unit Count	1.0 count
Voltage	12 Volts
Wattage	35 watts

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