- The turntable is driven by a 3-phase, 6 pulse, inductance motor,
with 8 pole Neodymium magnets and 3 integrated Hall position sensors.
- The electronic controller uses a high performance microcomputer,
optimised for motor control allowing very and accurate and stable speed control,
including 33.3, 45 and 78 rpm. This design incorporates a 4 layer surface mount
technology pcb with on-board user adjustable speed variation control.
- Complete with a comprehensive set of tools and equipment
- Height Setting Gauge
- Ø300mm Stroboscopic Disc
- Reflex Record Clamp
- Record Spindle Washer
- Soft Cover
- Operating Instruction Manual.
- Dimensions: 530 x 400 x 232mm.
- Packing: Substantial wooden case with internal fitments.
- Net weight with power supply: 53.5kg (118lb)
- Shipping weight approximately: 79.5kg (175lb)
Model 30/12 is available in two formats
- MODEL 30/12 equipped for but not including SME precision pick-up
arm.
- MODEL 30/12A with matching SME Series V~12 precision pick-up
arm.
|
A larger version of our well known Model 30/2, it will accept nine, ten and
twelve inch arms but is especially directed at the exciting Series V-12. This
offers performance 27% better than a nine inch arm in respect of angular error
distortion. Its immaculate construction and finish stem from facilities and
uncompromising quality control which have made the name SME a byword for
engineering excellence.
Created as a companion and to compliment the Series V~12, the Model 30/12
precision turntable enjoys all of the features associated the Model 30/2
precision turntable. The differences are merely ones of scale. The suspension
now provides 60 purpose moulded ‘O’ rings supporting the sub-chassis, which has
been increased in thickness by some 16%, on one hundred and twenty strands of
rubber. The main chassis has received similar attention but in this case the
thickness has been increased by 19%. Small differences but necessary to afford
the increased rigidity required to ensure acoustic neutrality.
In common with the Model 30/2, the Model 30/12 takes special account of sonic
considerations and with equipment of comparable quality can provide a listening
experience that allows L.P. sound to be re-assessed. Detail, resolution, and
neutrality are of a new order with a dynamic range that does justice to the
original sound. In conventional turntables metal supporting springs often
contribute significantly to colouration. Sometimes even their size and nature
can be identified by an experienced ear!
The unique suspension system of the Model 30/12, however has no sonic footprint,
it hangs the sub-chassis on one hundred and twenty strands of rubber in the form
of sixty purpose moulded ‘O’ rings. An ingenious method of anchorage allows them
to be removed or replaced instantly, should this ever be necessary, even while a
record is playing! The illustration shows how this design also places the centre
of gravity where it will give natural stability with minimal sensitivity to
external influences, contrasted with a conventional arrangement.
Sub-chassis motion is disciplined by four fluid dampers, one in each of the
supporting columns. These eliminate overshoot and give almost zero Q recovery,
allowing the user to make record and arm placements with total confidence. The
isolation needed to prevent acoustic feedback is bridged by the resistive
coupling of the damping fluid through which unwanted reacted energy is conducted
away to ‘ground’. This function is adjustable through trimmers which can be used
in conjunction with a gauge to give recommended settings or varied to suit
individual conditions.
Built-in locks one at each corner of the sub-chassis, enable the suspension to
be secured and automatically sealed for transport.
The moving parts of a fine turntable are of paramount importance. The spindle of
the Model 30/12 is 170,5mm (6 ¾“) long and 19mm (3/4”) diameter. The massive
sealed housing and individually fitted sintered bronze bearings in which the
spindle runs are also of the generous proportions needed to ensure that the
330mm (13”) diameter platter weighing 7.5kg (17lb) is adequately supported. The
Model 30/12’s excellent dynamics and pitch stability are largely the result of
the immense care taken in the design and execution of these components.
The platter face is machined with a fine scroll found to interface better than a
plain surface. A substantial reflex clamp ensures maximum contact with the
platter even when severe record warp is present. The sub-chassis/arm mounting
board interface is extensionally damped and the mounting board is reversible to
allow mounting of nine inch pick-up arms when necessary.
The powerful electronically commutated motor is ‘cogging-effect’ free and
virtually vibrationless by reason of its 2,5kg (5.5lb) weight. It is isolated on
urethane mounts and adjustable for accurate belt positioning.
It can be fairly claimed that the engineering of the Model 30/12 is unique in a
turntable. In the quest for perfection even the stainless steel motor pulley has
received detailed attention. It is crowned to ensure belt centrality, concentric
within +/- 2,5 microns (0.0001”) and secured to the precision ground tungsten
steel shaft with twin grub screws to maintain rotational balance.
From this the drive is transmitted via a ground rubber belt to a 209mm (8 ¼“)
sub-platter weighing 2,3kg (5lb). This is extensionally damped and incorporates
four captive transit screws allowing the main spindle’s vertical thrust bearing
to be off loaded for safe transport. Mains voltages available are 90-110V,
105-125V and 220-240V 50/60Hz. Please specify when ordering.
The turntable is driven by a 3 phase, brushless outrunner inductance motor with
8-pole Neodymium magnets and 3 integrated Hall position sensors. The electronic
controller uses a high performance microprocessor, optimised for motor control.
Closed loop speed control is implemented using a proportional plus integral (PI)
algorithm. Fine pitch speed adjustment allows increments/decrements of +/-0.01%
of selected speed. Speed ranges: 33.3, 45 & 78 rpm. |
