Series 300 Tonearm
The Series 300 broadens the application of SME technology.
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.
- 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.
- Internal wiring in silver litz.
- Balanced audio lead with gold plated phono plugs.
Series 310 Dimensions |
| |
A - Distance from pivot to stylus |
|
238.50mm |
B - Distance from pivot to turntable centre |
|
222.0mm |
C - Cartridge fixing centres |
|
12.70mm |
D - Offset angle |
|
22.569° |
E - Linear offset |
|
91.54mm |
F - Overhang |
|
16.50mm |
G - Height above mounting surface |
|
87.90mm max 56.40mm min |
H - Height of record surface above mounting surface |
|
55.90mm max 24.40mm min |
J - Depth below mounting surface |
|
56.75mm |
K - Radial clearance for balance weight |
|
73.0mm |
L - Clearance between cabinet lid and record surface, assuming cartridge height at 17.0mm |
|
37.0mm |
Series 310 Specifications | | |
Effective mass |
|
9.7g |
Cartridge balance |
|
6 - 17g |
Vertical tracking force |
|
0 - 3g |
Maximum tracking error |
|
0.013°/mm |
Net weight |
|
720.0g |
Pivot-stylus distance |
|
238.5mm |
Pivot-sindle centre distance |
|
220.0mm |
Audio lead |
|
1.2m |