Although the unique one-piece magnesium tone-arm is used for the Series 300 Model 309, advanced metal techniques produce a fabricated arm of exceptional stiffness for the Series 300 Model 310 and 312 arms thus allowing a choice of three arm lengths to suit all decks.

• Unique pressure die-cast magnesium shell detachable and interchangeable without disturbing cartridge or wiring.
• New design clamping arrangement ensures rigid junction with 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. Axis at record mean level to minimise warp-wow.
• Unique assembly gives high rigidity and allows bearings to be critically adjusted before 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 corresponds 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 damped 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).
• New design alignment protractor sets HTA with great accuracy.
• Cartridge leads and internal wiring LCOFC litz.
• Balanced LCOFC audio lead with gold plated phono plugs.