Real non-Hermitian energy spectra without any symmetry

Non-Hermitian models with real eigenenergies are highly desirable for their stability. Yet, most of the currently known ones constrained by symmetries such as PT-symmetry, which is incompatible realizing some exotic non-Hermitian phenomena. In this work, we investigate how skin effect provides an alternative route towards enforcing spectra and system We showcase, different classes energy dispersions, various ansatz that possess large parameter space regions spectra, despite not having any obvious symmetry. These minimal local can be quickly implemented in non-reciprocal experimental setups electrical circuits operational amplifiers.