Inner groove "Rumble"

phono preamp as it ages becomes more sensitive to styli or vinyl surface imperfections and passes rumble.

Marakantz, With much respect, your last statement is a doozy (not a Deusie). Can you say why that would be? Would you say that the converse is true: a new phono stage is less sensitive to rumble? I don't think so. But it does follow from your premise, which should indicate the premise is flawed.

Hi Lewm.....
As you requested up above, you can easily see my analog front end by clicking my system link. So, with all due respect, instead of telling us how Marakanetz's premise is flawed, can you please offer me some constructive advice as to what you may think about the problem I'm having. I would really appreciate your expertise. Thanks a lot.

..just a thought but the main bearing that holds the platter needs lubrication or replacement. That's what I would check first

Have you checked that the arm-lift is not touching the bottom of the arm when it reaches the end?
Some arm-lifts are not truly horizontal and if adjusted so that it has minimal clearance under the arm......can actually touch the arm?