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Condition: New
Warranty: 2 Years
Colour: Black
HTFH Cat. No.: EB357
  • SME - probably the best tonearms in the world
  • Detachable die-cast magnesium headshell
  • Silver litz internal wiring
  • Acoustically inert tonearm damps minute residual vibrations
  • 12" Version of the S309
£3,950.00 Each

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The Model 312S precision pick-up arm is an extension of the popular Series 300 range designed with maximising performance and ease of use in mind. It has a detachable magnesium headshell to provide the convenience of rapid cartridge interchange whilst 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.
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.



Internal constrained layer damps minute residual vibrations making tone-arm acoustically inert. 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.


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. Reference lines on tone-arm facilitate VTA setting. Fine adjustment of horizontal tracking angle (HTA). Cartridge leads and internal wiring in Silver litz.

Technical Specification


Model 312-S Specifications     
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

Model 312-S Dimensions     
A – Distance from pivot to stylus     308.80mm
B – Distance from pivot to turntable centre     295.60mm
C – Cartridge fixing centres     12.70mm
D – Offset angle     17.28°
E – Linear offset     91.54mm
F – Overhang     12.60mm
G – Height above mounting surface     max. 87.90mm - min. 56.40mm
H – Height of record surface above mounting surface     max. 55.90mm - min. 24.40mm
J – Depth below mounting surface     56.75mm
K – Radial clearance for balance weight     73.0mm

2 Years
Model Number
Total weight


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