  Subtracted geometries are black hole solutions of the four dimensional STU
model with rather interesting ties to asymptotically flat black holes. A
peculiar feature is that the solutions to the Klein-Gordon equation on this
subtracted background can be organized according to representations of the
conformal group $SO(2,2)$. We test if this behavior persists for the linearized
fluctuations of gravitational and matter fields on static, electrically charged
backgrounds of this kind. We find that there is a subsector of the modes that
do display conformal symmetry, while some modes do not. We also discuss two
different effective actions that describe these subtracted geometries and how
the spectrum of quasinormal modes is dramatically different depending upon the
action used.
