03-04-13: Dave_72
Oh ok, thanks for that. Interesting stuff. However, the stock tonearm on the 1210M5G doesn't ring or send subsonic signals through my speakers when tapped. And the 'table doesn't howl at high volumes. Maybe it's true that this is a better, more heavy duty model over a stock 1200 MK. 2.
My rig is also an SL1210 M5G with an AT150 MLX cartridge. However, every tweak I added as shown in the picture of my turntable produced an audible improvement in frequency linearity, dynamics, clarity, or lowered noise floor. When I tapped the tonearm I didn't get *subsonic* ringing, but a marked resonance where midrange hands off to treble. Still, much of this tweaking may be system-dependent and your TT could be a more natural match for your rack, wiring, electronics, speakers, component layout, and room.
The tonearm of the SL1210 M5G is different from the other 1200 series in a couple of ways--it's wired with oxygen-free copper and there is a set screw near the pivot for adjusting for DJ scratching. Other than that it's the same as the others--same weight, same shape, same bearings, no physical damping of the tube.