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Micro Seiki BL-91

2-Speed Belt-Drive Turntable (1979-1983)

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micro seiki bl91
micro seiki ma-701 low mass straight tonearm
Micro Seiki BL-91


Features a massive, thick, 12.2 inch platter, employing special alloy bearings machined and polished with techniques usually reserved for turbojet engines.

Micro Seiki engineers devised an exclusive oil-bath damping system to support the entire rotating assembly in complete isolation from all mechanical resonances.

A precision-ground drive belt connects the rotating assembly to the brushless, servo-controlled motor with total isolation from motor generated vibration.

In fact, the BL-91 (L) is probably the smoothest, most vibration-free device of its kind ever built.


Drive system: belt drive

Speeds: 33.33 and 45rpm

Speed variation: user variable to +-6%

Wow and flutter: 0.025% wrms

Signal to noise ratio: 75dB

Drive motor: 4-pole, 6-slot outer rotor brushless type, servo controlled

Platter 31cm 3.5kg incl rubber mat

Base construction: multi-laminar natural wood finished with hand rubbed natural ebony

Weight: BL-91 16kg, BL-91L 22kg


instruction/owners manual  Nihongo

L flyer  English

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Micro Seiki BL-91 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 Micro Seiki.