Acoustic Research XB1
Two-speed belt driven turntable with A/C synchronous motor. Introduced in 1972
The National Association of Broadcasters specifies that turntables used for broadcast work must meet certain standards in performance and dimensions.
The AR XB1 meets these standards, except for starting time, including the tolerance limits of the center spindle, which are +0, -0.0005", with a nominal diameter of 0.2830".
Some records have center holes smaller than specified by industry standards, and there may be a few which are tight on the spindle of the turntable.
This can usually be fixed by inserting and twisting the point of a pencil in the center hole to remove any scraps of plastic material left after moulding.
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Acoustic Research Belt Drive Turntables
Acoustic Research XB1 / XB 1 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 for financial gain is strictly prohibited. This website is not affiliated with or sponsored by Acoustic Research.
I used to sell these in early 1970s. brilliant sound for the money, it would out perform all the other decks we sold. Direct drive units did not even have a look in.
9/10 by desertdog