Odd that you are hearing it coming from the amp. Might want to keep it away from anything else to prevent whatever is doing it causing bleed-over to other channels.
One of the advantages of the BK + amps system over other transducers is the variable low pass filter. Without it other or a separate LPF other transducers can suffer from “voice in butt syndrome” where you feel people’s voices in your backside. Don’t suppose that enhances the reality of many movies, mainstream anyway (anticipating Mark).
Glad to hear they contacted you so quickly. I found dealing with them on my exchange was excellent.
