Taming the AEA HP Max .35 caliber PCP Airgun. Can you bring this beast down to "Backyard Friendly?"

The AEA HP Max .35 caliber precharged pneumatic air rifle is truly a beast of an airgun. It's small form factor with the folding buttstock makes it backpack friendly, but is it backyard friendly?
In short, no. At least not as it comes in the box.
It's loud, even with a shrouded barrel. I've taken readings several times, and always registered over 125 with no additional moderator. That's above the pain threshold and you really should be wearing hearing protection if you are shooting it that way.
In this video we test the Max with the DonnyFL .357 Ronin, the Ronin plus Extender and with the .45/50 Great Kami. I have not installed any of the included power washers, so it is shooting just north of 800 FPS.
The Max is unregulated, and I have yet to take the time to sort out the flat part of the shot curve. You'll see one magazine (8 shots) in this video.
Whether or not you think this rifle is backyard friendly with moderation is entirely up to how big your shooting space is and how close (and critical) your neighbors are.
I got my Max from The Pellet Shop, https://www.thepelletshop.com/ but you can also get them from ‪@UtahAirguns‬ https://utahairguns.com/ and a variety of other places.
Doing reviews of sound levels is difficult. Short of spending big money on the meter it can be hard to know whether or not you can trust the readings. Your phone can download an app (we use the NIOSH Sound Level Meter) and you can use it, but the microphone on your phone likely has a noise cancelling filter or function which will "diminish" the reading you are hoping to get. Your audience won't hear the full impact of the sound either.
Decibels are a measurement of sound pressure, so any reflection will change that reading. They are also algorithmic, so most of us don't really understand what the numbers mean, or how a few (three) points can be a big difference to the ear. But it doesn't look like much on paper.
For people who are interested in the AEA HP Max in .35 cal, I hope this helps you to make a decision on whether or not it's for you. For those looking to make it a little more friendly to the ear, I hope this helps you pick the right moderator.