VonHess

I did remove the passive radiator and switched the active woofers. Again the sound stayed in the same speaker and is coming from the woofer.

Just sort of re-inherited a pair of kg4.2s that I had given to my brother in the 90s. One of the speakers has what I would describe as a ‘knocking’ sound. It doesnt do it at lower volumes and it seems to only do it on certain bass frequencies. It gets worse as I raise the volume. I describe it as a ‘knocking to the beat of the music’. I switched the active woofers between speakers and the sound stays in the left speaker so I’m thinking it has to be in the crossover. Capacitor, possibly?