Boss CEB-3 Owner's Manual page 3

Features
The BOSS CEB-3 is a chorus unit that is specifically designed for electric bass guitar.
The CEB-3 allows you to select the frequency band to which the chorus effect will ap-
ply. That is, you can have the effect applied to the overall sound, or only a specific
frequency range if you wish.
Using the two channel outputs, deeper chorus effects can be created.
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