One of my better purchases for my system is this exhaust fan that’s built to be placed on top of audio components and is extremely quiet.. It has 3 fans that suck the hot air up and blow it out either the front or back depending on the unit. It has an LED temperature gauge to measure the internal temp of the component and you set it like a thermostat to the temp you want and it then cycles on/off to maintain that temperature. I use two of them on placed top of my tube amps. And did I say it’s quiet? It’s brilliant.
AC Infinity AIRCOM T10, Quiet Cooling Blower Fan System 17" Front-Exhaust, for Receivers, Amps, DVR, AV Cabinet Components https://www.amazon.com/dp/B078PQJSRY/ref=cm_sw_r_cp_api_glt_fabc_A0Q6TTEXXKMTGSYFS93T?_encoding=UTF8...
AC Infinity AIRCOM T10, Quiet Cooling Blower Fan System 17" Front-Exhaust, for Receivers, Amps, DVR, AV Cabinet Components https://www.amazon.com/dp/B078PQJSRY/ref=cm_sw_r_cp_api_glt_fabc_A0Q6TTEXXKMTGSYFS93T?_encoding=UTF8...