Post-shock SED as a function of shock velocity. Grey lines indicate the pre-shock SED and red lines the post-shock SED. Dotted and dashed lines indicate the contribution of carbonaceous and silicate grains respectively, to the post-shock SED. The assumed column density is N_H = 10²⁰ cm^-2. The 200 km s^-1 case is almost identical to the case of a 175 km s^-1 shock and is therefore not shown here.