Kinetic and magnetic horizontally integrated energy spectra during the saturation phase obtained with ℓ_max = 128 for simulation run B. Opaque lines represent the spectra excluding ℓ = 0 components, while transparent lines include them. The oscillations visible at high k/k_R when including ℓ = 0 components result from the our direct integration of Eq. (A.5) which involves spherical Bessel functions j_ℓ(kr) that are very oscillatory for kr ≫ ℓ.