EMG BTC BTS treble dip switches

[mav]

These EMG pre's have dip switches to adjust the treble. Mine was set to off/on and it's sparkly bright, which setting would have the least amount of treble? or close to a regular tone knob.
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[Bob_Ross]

The 1 off/2 off position looks like it would most closely approximate some hypothetical ideal passive tone control when you turned the treble control down. But since there's no such thing as a "hypothetical ideal passive tone control" you should probably experiment to see which position generates the response you want to hear. You may prefer 1 off/2 on.
(I'm guessing you won't prefer the other two options, since peaking/dipping filters don't sound like typical passive roll-offs.)