BandPass filter poles do not match the description on schematic

[kevinjwalters]

The v0.3 schematic describes the active filter as a BandPass filter (72Hz - 720Hz).

If I calculate the poles of the filter I get 159.15 and 723.43, the lower value does not match, why is that? I found an online bode plotter http://sim.okawa-denshi.jp/en/optool.php and it agrees with the frequencies I calculate.

[lorforlinux]

Hey @kevinjwalters, we are using 2.2uF on the production board of Muscle BioAmp Shield. Thus you are seeing 72Hz-720Hz on the specifications. I will update the schematic to reflect this production change.