A SP10 MkII plinth in mixed materials (wood based)

[thezenroom]

maglift feet:

http://www.tritonaudio.com/tritonaudio/ ... _guide.pdf

http://tritonaudio.com/index.php?option ... ro%20Audio

http://diyhifisupply.com/node/596

clearaudio also make some, but they cost alot more:

http://www.ebay.co.uk/itm/Clearaudio-Mi ... 763wt_1141

[thezenroom]

I have seen this methodology (on a Japanese site using google translate). Makes sense to move all those electronics away from the table...

not only that, removing all the alloy casing and baseplate, and bolting the motor firmly to the permali should eliminate as much resonance as possible.

This is why I am keen to try the Sorbothane feet.

some hi-fi people are snotty about sorbothane, saying that it deadens the sound: luckily sorbothane feet are not costly- so experimenting is easy.

What I would like to know is if the plinth resonates as a whole (since all the materials are glued together) or if each component resonates at its own frequency. Imagine a graph with spikes for each material... versus a graph with a single spike of the plinth as a whole...

as i understand it: as the sound/vibration/resonance moves through the compound material, each separate material will remove the resonance frequencies that it usually would: including the (50 micron) layer of glue- acting like CLD (constrained layer damping). if you get my drift.

The motor unit supported the armboard...

This one sounded the equal of the plinth I just built...

implying you haven't enjoyed the benefit of extra damping/isolation.

[alternativeroute]

The motor unit supported the armboard...

This one sounded the equal of the plinth I just built...

implying you haven't enjoyed the benefit of extra damping/isolation.

The 'plinthless plinth' turns everything on its head as it is essentially just a tonearm board bolted to the motor unit. Zero table support... Worked well - looked shocking

Now if we agree that a SP10 (in good working condition) has negligible rumble then attaching the tonearm directly to the table is a good move. Put the complete construction on a good turntable platform (to dissipate intrusive environmental disturbances) and the system should be good to go...

I found this old thread today: viewtopic.php?p=268458#p268458

Interesting reading again...