Fans on top of the receiver - worth it, or am I treating a symptom?

OldCooper

Member
Saw another post from someone who finally bought an AC Infinity setup for their rack, called it pricey but cheaper than frying a receiver, and I recognised myself from about two years ago. My AVR lives in a cabinet with a door, because that is the furniture we own and nobody was going to let me replace it, and for the first summer I kept finding the thing in protection mode halfway through a film.

Worth being clear about what the fan is actually doing, though. It is a patch. The real fix is airflow, which means taking the door off, cutting the back panel out, or moving the amp somewhere it can breathe. If you can do any of those, do that first and skip the fans entirely. Active extraction is what you buy when the furniture is not negotiable.

Two things I got wrong at the start. I pointed the fans at the chassis like it was a PC case, when what you want is extraction pulling hot air out of the top of the cabinet, otherwise you are just stirring warm air around a sealed box. And I ignored dust - a fan running most of the day turns the cabinet into a filter, and the amp is the filter.

The failure people worry about is dramatic and it is not usually what happens. What actually happens is years of running hot, capacitors ageing early, and an HDMI board getting flaky long before anything dies outright.

Has anyone here logged temps before and after? Every thread on this ends up at it feels cooler now, which is not exactly data.
 
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