  We present an experimental study on the perturbed evolution of
Korteweg-deVries soliton gases in a weakly dissipative nonlinear electrical
transmission line. The system's dynamics reveal that an initially dense, fully
randomized, soliton gas evolves into a coherent macroscopic state identified as
a soliton condensate through nonlinear spectral analysis. The emergence of the
soliton condensate is driven by the spatial rearrangement of the systems's
eigenmodes and by the proliferation of new solitonic states due to nonadiabatic
effects, a phenomenon not accounted for by the existing hydrodynamic theories.
