[Request] Perceived volume of a 150W guitar amp with an 8x12 cab

In another subreddit, someone "recommended" a triple Recrifier amp (which is available with 150W) with an 8x12 cab would be the perfect setup for a rental unit with thin walls. Now I know sound (dB) does scale logarithmically, but I have no idea how to calculate that. Now let's say we have a 150W power amp section with a high gain setting, connected to a passive 8x12 (which is 8 12 inch speakers) cab, how loud would that get and what could we compare that to in terms of perceived loudness?