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Micro Seiki BL-91

Turntable Details

Drive

Belt

Motor

Wow & Flutter %

0.025

Rumble [dB]

-75

Speed

33, 45

Dimensions [mm]

Platter Material

Die-cast Al

Platter Diameter [mm]

310.0

Total Weight [kg]

Tonearm

Year Built

16.00

1979

Platter Weight [kg]

3.50

Plinth Material

Price

Additional information

Key Features


  • Drive System: Belt-drive with a precision FG servo DC motor.

  • Motor: 4-pole, 6-slot outer rotor brushless type, servo-controlled for precise speed control.

  • Speeds: 33.33 and 45 rpm.

  • Speed Variation: User-variable to ±6%.

  • Platter: 310 mm die-cast aluminum platter weighing 3.5 kg (including rubber mat).

  • Wow and Flutter: Less than 0.025% WRMS.

  • Signal-to-Noise Ratio: Greater than 75 dB.

  • Tonearm: Compatible with various tonearms, including the MA-701.

  • Base Construction: Multi-laminar natural wood finished with hand-rubbed natural ebony.

  • Dimensions: Not specified for the BL-91, but the BL-91L is 600 x 186 x 4472 mm (WHD).

  • Weight: 16 kg for the BL-91, 22 kg for the BL-91L.

  • Years of Manufacture: 1979 to 1983.

  • Made in: Japan.

  • Original Price: Approximately 1,450 DM.

  • Power Supply: Operates at 120V (USA & Canada) or 220-240V (other areas), 50/60 Hz.


Additional Details


  • The BL-91 is a high-end belt-drive turntable known for its precise speed control and robust build quality.

  • It features an exclusive oil-bath damping system to isolate the rotating assembly from mechanical resonances.

  • The turntable is highly regarded for its smooth operation and is often praised for its sound quality.

  • The BL-91 is considered a classic among audiophiles, blending engineering precision with artistic execution.

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