JVC KW-NT1 Manuel D'instructions page 66

Sound equalization
~
Ÿ
!
Select a sound mode.
Storing your own adjustments
You can store your adjustments into <User1>,
<User2>, and <User3>.
1
Repeat steps ~ and Ÿ, then in step !...
2
Adjust (1), then store (2).
Also adjusts the frequency level
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