On Tue, 5 Dec 2017 04:20:59 -0500, Jack wrote:

Short of a volume limiter, I don't believe you can protect a speaker from a teenager.

....Slowly raises hand. I could shake the pictures on the walls at
home. Once came up from the basement, after the stereo sound stopped.

Dang. A speaker was on fire. I threw it out the front door, in the
snow.