JBL Audio RANDOMLY Gets SUPER LOUD/Awesome Then Weak And Not Loud At Max?

[landcruiserc]

Seems to be THUMPING HARD and loud one moment then at MAX 60, there's not much bass you can feel and the volume isn't loud enough to hurt your ears.

Changes from GREAT to MEH whenever I'm driving under X speed or over, etc. VERY RANDOM.

Anyone else have this issue?

Is it the noise canceling BS affecting it?