Tonearm mount to the plinth vs arm board vs rotating arm board vs isolated tower

You didn’t strike a nerve, pal, you struck out.

It’s bad enough we have to contend with the forces of the seism, now we have to contend with the forces of evil.  🦹‍♀️ 

Hey, lewm - Blow it out your bagpipes, dude! See if anyone listens to that. 

It’s customary to describe six degrees of motion as follows,

The y axis (vertical direction), z axis (first horizontal direction), x axis (second horizontal direction), plus three rotational directions, rock, roll and twist, around the x, z and y axes, respectively. (There is actually an infinite number of directions in the horizontal plane.) Let’s twist again like we did last summer! 🕺🏻 Think of seismic type forces moving the component like a wave passing under a boat out on the ocean.

ct0517
and GK
Not sure what question or answer you are referring to, or if it was even directed to me. I was replying solely to Nikola’s post.
I will say however.

Blessed is the Audiophile that finds Audio Nirvana on a budget.

Kind of like you and your Walkman that you discuss here frequently. A shining excellent example for everyone to follow.

>>>>Back at ya, slick.

If you don’t know the answer just say you don’t know. Saves a lot of grief later on. 😫

Huh? What the ding dong? 😳 When I use the word isolation I’m referring to the only real kind of isolation. If you’re still unsure what I mean let’s see a show of hands. 

Essentially the problem is that the tonearm and cartridge are designed to have resonant frequencies Fr around 8-12 HZ (well below the lowest speaker frequencies) which ARE in the range of *very low frequency* seismic type vibration coming from the floor. So, that structural vibration can excite the natural frequencies Fr of the tonearm and cartridge. Sadly, damping techniques are not very successful for these *very low frequencies*. If they were LIGO wouldn’t have had to wait 20 years for the development of sufficiently good isolation techniques to observe gravity waves, they could have used damping techniques. But isolating the turntable from seismic forces is very effective, especially when the Fr of the isolating system is 3 Hz or lower.

Once you isolate the turntable all that damping stuff is passé. The isolation is a two way system. 🔛