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楽器 Yamaha BB 605のPDF オーナーズマニュアルをオンラインで閲覧またはダウンロードできます。Yamaha BB 605 11 ページ。 Electric bass
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Yamaha BB 605 オーナーズマニュアル

PICKUP HEIGHT ADJUSTMENT

The height of the pickup (i.e. distance from the strings) affects
gain — the higher the pickup, the louder the sound, and vice
versa. If the pickup is set too high, sustain and playability will
suffer because of the magnetic pull on the strings. Adjust overall
height using the screws located at either side of the pickup.
The polepieces should normally be about 2 or 3 millimeters
from the strings.
Pickup adjustment screws
Pickup adjustment screws

TRUSS ROD ADJUSTMENT

The curvature of the neck should be slightly concave.
Clockwise rotation of the nut tightens the rod and corrects for
too much concave bow. Counterclockwise rotation of the nut
loosens the rod and corrects for too much convex bend. Make
any adjustments gradually. Allow five to ten minutes for setting,
and check the curvature after each 1/2 turn of the truss rod nut.
If too much
If too much
convex bend
concave bow
NOTE: Unless you have experience with truss rods, we
suggest that you entrust this adjustment to your
dealer.
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concave
convex