I sent back a Samson VX8.1 line array pa unit that was not working properly and decided instead to buy a Turbosound IP1000 which I rec'd 10/12/2019. I only ran the IP1000 a few hours to practice on my Roland RD-2000. The rear metal plate where inputs plug in, gets almost too hot to touch. Should I be concerned about internal heat build up as I don't see a visible cooling fan nor any air vent ports. On the Samson VX8.1 I returned, plus many other models I've researched, do have a visible cooling fan and or air venting with some having possible non-visible internal fans. On this blog somewhere, I read someone was asking IF there was an effective way to retrofit a cooling fan solution for their speaker. I do "know" that excessive heat does in fact break down electronics over time. IS there any internal fan or any air porting/venting in any of the Turbosound Inspire IP1000 thru IP3000 models? I like the sound I'm hearing, I'm also thinking about pa system longevity too.