The reason the pots on this amp cracked/broke is because the PCB inside sat a bit too for from the face of the chassis. The pots on these units are PCB mounted so the were there pushed forward for at least 15 years. Not all of them had come apart but they were on their way though so we replaced them all.

Here’s how the pots were originally mounted.

Original pots removed.

New pots prepared before installation.

New pots installed and board back into place.