Not really worth it's own thread, but trying to search the answer for this online would be a nightmare so...
I have recently picked up a Mesa Walkabout Scout combo for a good price - fantastic bit of kit! All my current gigs run without a backline with IEMs and everything going straight to FoH, but I picked this up in case any dep gig opportunities come up where I do need an amp.
However, for the moment, I will just be using the Mesa at home. To try and make that a little more considerate for neighbours, I bought one of these speaker isolation pads, Auralex type knockoff jobbie (https://www.amazon.co.uk/dp/B00SVRLR06), only the one I got is smaller and only just fits under the cab, which I prefer for neatness/space. The problem I have is that the amp is making the platform flex - it is made of rubber rather than wood or similar and as such, having the weight of the amp concentrated on four feet in each of its corners is making it sink and sag at the edges and flex up in the middle, which doesn't look great and can't be good for the pad in the long term. So, I decided to take the feet off the Mesa so that it rested flat on the pad instead. Problem solved.
BUT those familiar with the Scout will know that the cab has a downward facing passive radiator on the bottom. Removing the feet means that this radiator is now firing directly into the pad with no clearance.
Now, given I will only be using the combo in this way at home, at volumes low enough to not cause an uprising, I can't see this is an issue at all. But I don't really know what a passive radiator does, other than vaguely understanding it helps the main speaker push more low end out of the cab, effectively. Am I right, is this fine to effectively block?
Most boring thread you've ever read, eh?