Motor & Delta Sigma Processor

The ΔΣ-Drive motor control technology delivers a perfect drive sine wave signal to the iron-coreless direct drive motor using a PWM signal generation with ΔΣ (Delta Sigma) modulation, expanding the PWM carrier frequency from around 2 kHz to over 20 kHz and reducing audible noise and further suppressing micro-vibrations. The iron-coreless double-rotor/single stator engine design eliminates unwanted “cogging” and delivers high drive torque for superior rotational power. This new motor design has been reworked using a reinforced stator board with non-magnetic screws to reduce minute vibrations and smooth out the sensitive tracking process.

Pitch control is achieved using a Hall effect sensor hybrid encoder that constantly monitors and corrects rotational speed. This technology compensates for external influences, like warped vinyl and varying stylus drag effects.

The SL-1200GME comes with an S-shaped magnesium tonearm with high-precision bearings all mounted on the 4-layered plinth that is a composite of an aluminium diecast, BMC (Bulk Moulding Compound), a 10mm hairline-brushed aluminum top plate and a heavy-weight rubber coating on the bottom chassis. All resulting in most vibrations being totally suppressed.

The 3-layered heavily damped platter is formed from an aluminum die-cast with vibration suppressing heavyweight rubber on the bottom surface and a 2mm thick brass top plate for additional vibration reduction, for a total weight of 7.9lbs, including its solid rubber matt. Each platter is balanced individually ensuring a perfectly even and steady rotation.

Supporting the entire turntable assembly are four adjustable insulator feet that use a newly developed zinc insulator using αGEL gelatinous material with excellent shock absorption, providing high vibration damping and minimizing feedback.

Power supply and speed control electronics

Finally, there is a new multi-stage silent power supply,  a combination of a low-noise, high-speed switched mode power supply working at over 100kHz, and a noise canceling circuit. This circuit cancels remaining noise by injecting the reversed-phase current of the actual noise. This technique  creates a very low noise floor, enabling excellent signal-to-noise ratio, improving the overall turntable performance.

Features At A Glance:

• New twin-rotor coreless direct drive motor achieving stable rotation
• ΔΣ-Drive suppresses vibrations from the motor for smoother, more accurate rotation
• Anti-vibration structure with a three-layer platter and a four-layer cabinet construction
• High-damping silicon insulators using αGEL
• Magnesium tonearm achieving high Initialmotion sensitivity
• Low-noise, low-voltage power circuit and a switching power supply

Specifications:

• Terminals: Phono (RCA) x 1, Earth x 1