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Superconductivity or metallic state may coexist with density wave ordering atimperfect nesting of the Fermi surface. In addition to the macroscopic spatialphase separation, there are, at least, two possible microscopic structures ofsuch coexistence: (i) the soliton-wall phase and (ii) the ungappedFermi-surface pockets. We show that the conductivity anisotropy allows todistinguish between these two microscopic density-wave structures. The resultsobtained may help to analyze the experimental observations in layered organicmetals (TMTSF)$_{2}$PF$_{6}$, (TMTSF)$_{2}$ClO$_{4}$, $\alpha$-(BEDT-TTF)$_{2}$KHg(SCN)$_{4}$ and in other compounds.

Conductivity anisotropy helps to reveal the microscopic structure of a density wave at imperfect nesting