Series 300

The Series 300 broadens the application of SME technology. A one piece magnesium tone arm, available as Model 309 and Model 310.

The detachable magnesium headshell has a new style coupling, providing the convenience of rapid cartridge interchange without loss of rigidity.
Our designers can be justly proud of these models which offer a performance and manufacturing excellence unmatched by many more expensive models.

Series 300 Dimensions Model 309 model 310
A – Distance from pivot to stylus 232.32mm 238.50mm
B – Distance from pivot to turntable centre 215.35mm 222.0mm
C – Cartridge fixing centres 12.70mm 12.70mm
D – Offset angle 23.204° 22.569°
E – Linear offset 91.54mm 91.54mm
F – Overhang 16.98mm 16.50mm
G – Height above mounting surface 87.90mm max
56.40mm min
87.90mm max
56.40mm min
H – Height of record surface above mounting surface 55.90mm max
24.40mm min
55.90mm max
24.40mm min
J – Depth below mounting surface 56.75mm 56.75mm
K – Radial clearance for balance weight 73.0mm 73.0mm
L – Clearance between cabinet lid and record surface, assuming cartridge height at 17.0mm 37.0mm 37.0mm

Additional Information

Build
  • Unique pressure die-cast magnesium shell detachable and interchangeable without disturbing cartridge or wiring.
  • New design clamping arrangement ensures rigid junction with tone-arm.
  • 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.
  • Internal wiring in silver litz.
Damping
  • Internal constrained layer damps minute residual vibrations making tone-arm acoustically inert.
  • 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.
Adjustments
  • 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.
  • Reference lines on tone-arm facilitate VTA setting.
  • Fine adjustment of horizontal tracking angle (HTA).
Specification
Series 300 Specifications Series 309 Series 310
Effective mass 9.5g 9.7g
Cartridge balance 6 – 17g 6 – 17g
Vertical tracking force 0 – 2.5g 0 – 3g
Maximum tracking error 0.013°/mm 0.013°/mm
Net weight 717.0g 720.0g
Pivot-stylus distance 232.2mm 238.5mm
Pivot-sindle centre distance 213.4mm 220.0mm
Audio lead 1.2m 1.2m
Manuals