Mean 3.6 μm surface brightness and A₂ profiles obtained via 2D (solid line) and 1D (dashed line) stacking of early- (T< 5, blue) and late-type (T ≥ 5, red) S⁴G barred galaxies. From the 2D bar stacks we show the azimuthally averaged μ_{3.6 μm}(AB) profile. Bars in early-type systems are more centrally concentrated and present larger density amplitudes than their late-type counterparts.