[QUESTION] Fender super reverb RI. Wierd sound.

[Question] Hello reddit, I come to you again for help. I just got this used fender super reverb about a month ago. Recently it started making this sound which I think is a blown speaker. It does this on low notes and is really bad when I play a high A on the A string. Just looking for a couple of opinions. Thanks for the help. https://youtu.be/oLvsAOudr-8