SP10mk2: OMA Graphite plinth vs.Dobbins plinth

chakster, the only other mat on my radar would be a stainless steel type.  Weight is a factor not to be dismissed but imho, it's not everything.  The Cu-500 is still Gunmetal.  During listening, I quickly ascertained my AF pure Copper platter mat was heads above the MS Cu-180 Gunmetal Copper alloy, so I had no real motivation to seek out their other mat but perhaps I will buy one to try anyway per your recommendation.  To clarify, does anyone know if the SAEC SS-300 compromised of any stainless steel at all?  At only 870 g it must be a type of lightweight aluminum alloy, no?  I presume by comparison measurements provided at the time by Micro they were referring to weight, density and resonant frequency...ect.  I had the hardened aluminum alloy Oyaide MJ-12 years ago and as I recall it was thin anemic sounding, not at all musical so I sold it. 

.......mmmmhhh   perhaps the heavy weight does not mean everything.

@best-groove My good sir, welcome to the eccentric world of high end audio, nothing means everything! :)
 

@ ferrari275 

What does the pure copper mats do sonically that are heads and shoulders above the gunmetal copper alloy's like the cu-180?   in your opinion.

LOL.......it's nice to read about mat when the title of the 3ad asks for plinth he he he.

Dear @downunder :  """  any other mat I have tried... """

Try to found out the ATs and original SOTAs and test it vs what you already have, I'm sure that even your P3 will be an improvement.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

Dear @ferrari275: """  a pure Copper platter mat's tonal characteristics are superior in.........................................................................................

aluminum alloy..........I recall it was thin anemic sounding, not at all musical ...."""


Tonal/anemic characteristics?, I can't understand why we are looking for a kind of sound in the TT mat when what we have to look is for an " inert /non resonant " mat that can damped and don't interfere coloring the cartridge signal.. Metal is resonant no matters its weigth and unfortunatelly resonances/vibrations colors the audio signal and steel is no different. In the aluminum AT the LP is " running "  on vacuum and the SOTA is non-metal ones. Normally metal is a bad material in TT/tonearms/cartridges and the like. As less metal in a home audio system as better its quality performance levels. No, we can't disappears metal material from audio items  and in some specific items is need it.

R.