{"id":22736,"date":"2021-02-21T12:03:34","date_gmt":"2021-02-21T11:03:34","guid":{"rendered":"https:\/\/alphahighend.be\/?post_type=product&p=22736"},"modified":"2021-02-21T12:03:34","modified_gmt":"2021-02-21T11:03:34","slug":"sme-model-20-3","status":"publish","type":"product","link":"https:\/\/alphahighend.be\/nl\/produit\/sme-model-20-3\/","title":{"rendered":"SME Model 20\/3"},"content":{"rendered":"
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SME Model 20\/3 : Turntable<\/h1>\n

This finely engineered precision turntable is built to the same exacting standard and incorporates many design features originated for the Model 20\/12. Massive construction, extensional damping of major surfaces and lack of vibration from moving parts ensures exceptional detail, resolution and uncoloured performance.<\/p>\n<\/div>\n<\/div>\n

A turntable should address the problems of extraneous vibrations. These emanate from numerous sources including air and structural vibration from loudspeakers, groove modulation, stray electrical fields and mechanical imperfections in moving parts. In the Model 20\/3, superb instrument quality machining is allied with fundamental physics. The higher the mass and stiffness of a body the less it will flex and vibrate; the duration of a vibration can be shortened by suitable damping.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Model 20\/3 weighs approximately 28.6Kg (63lb), significant in relation to its size because it is density that matters. For example, the same weight of metal spread over a large enough area would be aluminium foil! The sub-chassis measures only 440mm (17 5\/16\u201d) by 350mm (13 \u00be\u201d) but weighs 11Kg (24lb). Its thickness 16mm (5\/8\u201d) resists flexing at low frequencies whilst high frequency resonance is attenuated by efficient extensional damping.<\/p>\n

Suspension :<\/p>\n

No sonic footprint, the sub-chassis is hung on 80\u00a0strands of rubber in the form of 40\u00a0purpose moulded \u2018O\u2019 rings. An ingenious method of anchorage allows them to be removed or replaced instantly.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Damping :<\/p>\n

A large centrally placed fluid-damper disciplines sub-chassis movement with a pleasing sense of security when handling records on and off the platter,\u00a0offering a resistive ground-path for acoustic signals.<\/p>\n

In addition to a cartridge\u2019s electrical output, mirror image acoustic signals reacted in the arm and record, will pass into the sub-chassis in the course of dissipation. However the usual closed loop design does not address the problem of their differing phase so in the Model 20\/12 the structural interfaces concerned have received special attention to provide paths of the required impedance.<\/p>\n

This control of vibration is fundamental to the design of the player and goes much of the way to explaining the stunning tonal and dynamic neutrality that it exhibits.<\/p>\n

Platter :<\/p>\n

6.5Kg (14.3lb) platter.\u00a0The 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.<\/p>\n

Motor :<\/p>\n

The turntable is driven by a 3 phase, brushless outrunner motor with 8-pole Neodymium magnets and 3 integrated Hall effect\u00a0sensors and virtually vibrationless by reason of its 2.5 kg (5.5 lbs) weight as well as being\u00a0isolated on urethane mounts that are\u00a0adjustable for accurate belt positioning.<\/p>\n

Speed Control :<\/p>\n

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.<\/p>\n

Power :<\/p>\n

Mains voltages available are 90-110V, 105-125V and 220-240V 50\/60 Hz. Please specify when ordering.<\/p>\n

Specifications : \u00a0 \u00a0 SME Model 20\/3<\/h3>\n

Dimensions<\/b>:<\/strong> 440 x 350 x 172mm
\nNet weight:<\/strong> 31kg (68lb)
\nShipping weight:<\/strong>\u00a045kg (100 lbs)<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

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