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We perform spectral fitting for a set of O-type stars based onself-consistent wind solutions, which provide mass-loss rate and velocityprofiles directly derived from the initial stellar parameters. The greatadvantage of this self-consistent spectral fitting is therefore the reductionof the number of free parameters to be tuned.  Self-consistent values for the line-force parameters (k,alpha,delta) andsubsequently for the mass-loss rate and terminal velocity are provided by them-CAK prescription introduced in Paper I, updated in this work withimprovements such as a temperature structure for the wind, self-consistentlyevaluated from the line-acceleration. Synthetic spectra are calculated usingthe radiative transfer code FASTWIND, replacing the classical beta-law for ournew calculated velocity profiles.  We found that self-consistent m-CAK solutions provide values for theoreticalmass-loss rates on the order of the most recent predictions of other studies.From here, we generate synthetic spectra with self-consistent hydrodynamics tofit and obtain a new set of stellar and wind parameters for our sample ofO-type stars whose spectra was taken with the high resolution echellespectrograph HERMES (R=85000). We find a satisfactory global fit for ourobservations, with good accuracy for photospheric He I and He II lines and aquite acceptable fit for H lines. Although this self-consistent spectralanalysis is currently constrained in the optical wavelength range only, this isan important step towards the determination of stellar and wind parameterswithout using a beta-law. Given these results, we expect that the valuesintroduced here should be helpful for future studies about the starsconstituting this sample, together with the prospective that the m-CAKself-consistent prescription be extended to numerous studies about massivestars in future.

New self-consistent wind parameters fitting optical spectra of O-type stars observed with HERMES spectrograph