  Warped string compactifications, characterized by non-singular behavior of
the metric in the infrared (IR), feature departures from the usual anti-de
Sitter warped extra dimensions. We study the implications of the smooth IR
cutoff for Randall-Sundrum (RS) type models. We find that the phenomenology of
the KK gravitons (including their masses and couplings) depends sensitively on
the precise shape of the warp factor in the IR. In particular, we analyze the
warped deformed conifold and find that the spectrum differs significantly from
that of RS, and present a simple prescription (a mass gap ansatz) which can be
used to study the phenomenology of IR modifications to 5-d warped extra
dimensions.
