SINFONI J, H, K spectra of the sample, separated into three age groups: (top panel, top to bottom) the 1–3 Myr objects DH Tau B, GQ Lup B, and CT Cha B; (middle panel. top to bottom) the 8 Myr objects 2M1207A, TWA 5B and 2M1207B; (bottom panel, top to bottom) the 30–50 Myr objects GSC 08047B, 2M0141, and AB Pic B. For each age group, the spectra are ordered from hottest (top) to coolest (bottom), and an offset has been added to the flux for ease of comparison. The spectra of the youngest subset have been dereddened based on the extinction measured for the primaries.