I've now finished my Garrard 401 plinth, after a lot of experiments.
This is what it looks like:
As you can see I opted for a constrained layer, with bamboo 18mm, aluminium AW7075 5mm, bamboo 18mm, stacked with brass spacers, and separating the armboard from the motorboard. I can just make another armboard if I will change the arm. Thinking about a Groove Master 2, which would look great here.
The turntable has Soundcare Superspikes, which work great, better than normal cones I had and a lot better than damping feet/rubber/sorbothane, and its easy to level the turntable.
A few hours of listening and really enjoying myself and this is where I wanted to go, as the MPX monolith sounded so muffled and flat.
I've compared it to digital and analog is now much better;
The treble is more pleasant and realistic, the mids have a incredible directness and intimacy, spaces are beautifully worked out and the bass has the right drive and definition. And the dynamics are really impressive! This has so much musicality, you are really drawn into the music. I really like it!
When I compare this to my MPX monolith, this is quit something, and it costs not much more.
When our new listening room is ready, I will also change my rack and will give constrained layers a try for the rack also.
Regards, Remco