Hello Scott,

I am interested in upgrading a couple of my APEX 430 condensors. I have
recently been getting some background noise from these mics and I though
this mod would rectify the problem. There must be some caps going bad or
something to that effect. It sounds like a low level rumble. Sometimes it
will go away after a few min.

Are you still selling your upgrade kits for this style of mics? I know that
this upgrade kit is adaptable to the MXL 2001 and a few other brands, but I
wasn't sure if it would work for the APEX 430s. The guts do look similar.

Thanks for your time,
ART