I do not use any kind of cooler on my two-channel analog system, even with its 100wpc tube amp. It's just not needed.
However, I found that modern multi-channel AV processor/receivers certainly are in need of additional cooling (mostly due to the A/V boards, I think) so I utilize a Cooler Guys twin fan cooler on top of my Integra receiver that draws the hot air up and out of the unit and allows it to run much cooler after a double feature movie night in my HT room.
However, I found that modern multi-channel AV processor/receivers certainly are in need of additional cooling (mostly due to the A/V boards, I think) so I utilize a Cooler Guys twin fan cooler on top of my Integra receiver that draws the hot air up and out of the unit and allows it to run much cooler after a double feature movie night in my HT room.