Bass/Treble settings on Sansa

[Timar]

I read somewhere in the forums here, that the bass/treble settings are supposed to control the "hardware" equalizer and thus should have less impact on battery life than the "software" eq. Is this true (for the Sansa Clip)? Or is it just a simpler setting for those who can't handle a parametric equalizer?

And does someone know which cutoff frequency / q value these settings are fixed to?