After purchasing 4x SRX815p & 4x SRX812p, I've noticed the amp module can give off a rather loud buzz at a certain frequency or frequencies. This one give off a pretty nasty buzz at a bit over 200Hz. It's not super audible in front of the box, but it's pretty nasty when you're behind it. It seems JBL should have done a better job with damping the components in the module.
![](https://s2.save4k.ru/pic/cHzi2_51JL0/maxresdefault.jpg)