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SME - SME Series 312S Tonearm




Product No.:
Limited Stock



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Stereophile - 2018 500 Recommended Components Stereophile - 2017 500 Recommended Components

The Model 312S precision pick-up arm is an extension of the popular Series 300 range designed with maximizing performance and ease of use in mind. It has a detachable magnesium headshell to provide the convenience of rapid cartridge interchange while maintaining a degree of rigidity normally only associated with arms of one piece design. The 12-inch magnesium construction takes advantage of the reduction in maximum tracking error/distortion afforded by the greater arm length when compared with 9-inch models.


  • The 12in pressure die-cast magnesium construction takes advantage of the reduction in maximum tracking error/distortion afforded by the greater arm length when compared with 9in models.
  • Unique pressure die-cast magnesium shell detachable and interchangeable without disturbing cartridge or wiring.
  • Design of headshell clamping ensures a rigid junction with the tone-arm.
  • Internal constrained layer damps minute residual vibrations making tone-arm acoustically inert.
  • Stainless steel cross shaft, ground and thread ground. Carried in massive yoke on 10mm precision ball races. Axes at record mean level to minimise warp-wow.
  • Unique assembly gives high rigidity and allows bearings to be critically adjusted before the tone-arm is fitted.
  • Stainless steel vertical shaft, ground and thread ground, with integral 16mm diameter flange to couple shaft and yoke.
  • 23mm diameter steel pillar, heat treated, ground and honed, carries two 17mm precision ball races, widely spaced to resist tilt.
  • Anti-skate control operates through tension spring and filament. Dial calibrated to correspond with VTF and has positive OFF position.
  • Lowering/raising control gives smooth positive action. Height of lift can be adjusted.
  • Dual-lock base provides movement control with high rigidity.
  • Tungsten-alloy balance weight carried on two-point suspension. Extra-low inertia design assists warp riding.
  • Underslung weight housing corrects centre of gravity and provides non-reflective tone-arm termination.
  • Swivelling, damped output socket minimises vibration transmission in sub-chassis use.
  • Reference lines on tone-arm facilitate VTA setting.
  • Fine adjustment of horizontal tracking angle (HTA).
  • Alignment protractor designed to provide HTA setting with greater accuracy.
  • Cartridge leads and internal wiring in Silver litz.
  • Balanced Silver-hybrid audio lead with gold plated phono plugs

  • Dimensions

    Distance from pivot to stylus     308.80mm
    Distance from pivot to turntable centre     295.60mm
    Cartridge fixing centres     12.70mm
    Offset Angle     17.28º
    Linear Offset     91.54mm
    Overhang     12.60mm
    Height above mounting surface     max. 87.90mm/min. 56.40mm
    Height of record surface above mounting surface     max. 55.90mm/min. `24.40mm
    Depth below mounting surface     56.75mm
    Radial clearance for balance weight     73.00mm


    Effective Mass     14.0g
    Cartridge balance range     7.0-19.0g
    + One accessory weight - up to     24.5g
    + Two accessory weight - up to     30.0g
    Maximum tracking error     0.009°/mm
    Null points:     Inner 63.62mm
    Outer 119.46mm
    Internal wiring:     Ultra-flexible Silver litz
    Audio lead:     Length 1.2m
    Weight net:     820.0g

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