Two Speed Direct Drive Turntable
Strathearn's aim with the SMA2 turntable was to improve on the performance of the best existing component arms and turntables, through the use of technology.
The SMA2 is a two-speed, manually operated, electronic servo, direct drive turntable with a precision, low mass pickup arm.
The low mass of the tonearm enables advantage to be taken of very high compliance cartridges.
Precision ball races provide almost frictionless vertical and lateral bearings, while the geometry has been designed to be as close to optimum as possible.
The new design of electronic servo direct drive motor in the SMA-2 has levels of speed variation (wow, flutter and drift) and vibration (rumble) that are so low compared with those on records, that further improvement would be of questionable value.
Because the motor speed is more accurate than the AC line supply frequency, Strathearn developed an electronic strobe using two light emitting diodes to allow more precise adjustment of speed.
Manual operation is made simple and convenient by touch buttons for jolt free operation.
Drive: servo controlled direct drive
Speeds: 33 and 45rpm
Pitch control: +-4%
Wow and flutter: 0.08%
Arm type: low mass detachable pivoted arm
Arm effective mass: less than 5g
Maximum tracking error: less than 2 degrees
Effective length: 220mm
Stylus pressure: 0 to 3.5g
Cartridge weight: 3 to 9.5g
Bias: adjustable for spherical and elliptical styli
Dimensions: 420 x 90 x 380mm
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Strathearn SMA2 / SMA-2 owners manual, service manuals and schematics are for reference only and the Vinyl Engine bears no responsibility for errors or other inaccuracies. The PDF files are provided under strict licence. Reproduction without prior permission or for financial gain is strictly prohibited. This website is not affiliated with or sponsored by Strathearn.