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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.

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




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.


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



Manual for Series 300 Tonearm (PDF)

312S Information Sheet

312S Information Sheet 2

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